Java文件操作大全(包括文件加密,String加密)

1.创建文件夹//import java.io.*;File myFolderPath = new File(%%1);try {if (!myFolderPath.exists())myFolderPath.mkdir();}catch (IOException e) {System.err.println("新建目录操作出错");}2.创建文件//import java.io.*;File myFilePath = new File(%%1);try {if (!myFilePath.exists())myFilePath.createNewFile();FileWriter resultFile = new FileWriter(myFilePath);PrintWriter myFile = new PrintWriter(resultFile);myFile.println(%%2);myFile.flush();resultFile.close();}catch (IOException e) {System.err.println("新建文件操作出错");}3.删除文件//import java.io.*;File myDelFile = new File(%%1);try {if(myDelFile.delete()){%%2}}catch (IOException e) {System.err.println("删除文件操作出错");}4.删除文件夹/*import java.io.*;import java.util.*;*/LinkedList<String> folderList = new LinkedList<String>();folderList.add(%%1);while (folderList.size() > 0) {File file = new File((String)folderList.poll());File[] files = file.listFiles();ArrayList<File> fileList = new ArrayList<File>();for (int i = 0; i < files.length; i++) {if (files[i].isDirectory()) {folderList.add(files[i].getPath());} else {fileList.add(files[i]);}}for (File f : fileList) {f.delete();}}folderList = new LinkedList<String>();folderList.add(%%1);while (folderList.size() > 0) {File file = new File((String)folderList.getLast());if (file.delete())folderList.removeLast();else {File[] files = file.listFiles();for (int i = 0; i < files.length; i++) {folderList.add(files[i].getPath());}}}5.删除一个文件下夹所有的文件夹/*import java.io.*;private static LinkedList<String> folderList=null;*/File delfile=new File(%%1);File[] files=delfile.listFiles();for(int i=0;i<files.length;i++){if(files[i].isDirectory()){if(!files[i].delete()){folderList = new LinkedList<String>();folderList.add(files[i]);while (folderList.size() > 0) {File file = new File((String)folderList.poll());File[] files = file.listFiles();ArrayList<File> fileList = new ArrayList<File>();for (int i = 0; i < files.length; i++) {if (files[i].isDirectory())folderList.add(files[i].getPath());elsefileList.add(files[i]);}for (File f : fileList)f.delete();}folderList = new LinkedList<String>();folderList.add(files[i]);while (folderList.size() > 0) {File file = new File((String)folderList.getLast());if (file.delete())folderList.removeLast();else {File[] files = file.listFiles();for (int i = 0; i < files.length; i++) {folderList.add(files[i].getPath());}}}}}}6.清空文件夹//import java.io.*;File delfilefolder=new File(%%1);if (!delfilefolder.exists() && !delfilefolder.delete()){LinkedList<String> folderList = new LinkedList<String>();folderList.add(delfilefolder.getAbsolutePath());while (folderList.size() > 0) {File file = new File((String)folderList.poll());File[] files = file.listFiles();ArrayList<File> fileList = new ArrayList<File>();for (int i = 0; i < files.length; i++) {if (files[i].isDirectory())folderList.add(files[i].getPath());elsefileList.add(files[i]);}for (File f : fileList)f.delete();}folderList = new LinkedList<String>();folderList.add(delfilefolder.getAbsolutePath());while (folderList.size() > 0) {File file = new File((String)folderList.getLast());if (file.delete())folderList.removeLast();else {File[] files = file.listFiles();for (int i = 0; i < files.length; i++) {folderList.add(files[i].getPath());}}}}delfilefolder.mkdir();7.读取文件//import java.io.*;7.1.操作系统默认编码FileReader fr=new FileReader(%%1);BufferedReader br = new BufferedReader();String %%2=nul;try {while ((%%2 = reader.readLine()) != null) {%%3}} catch (IOException e) {e.printStackTrace();} finally{try {br.close();fr.close();} catch (IOException e) {e.printStackTrace();}}7.2.UTF-8编码FileInputStream fis=new FileInputStream(new File(%%1));InputStreamReader read = new InputStreamReader(fis,"UTF-8");BufferedReader reader=new BufferedReader(read);String %%2=null;try {while ((%%2 = reader.readLine()) != null) {%%3}} catch (IOException e) {e.printStackTrace();} finally{try {br.close();read.close();fis.close();} catch (IOException e) {e.printStackTrace();}}7.3.分块读取FileInputStream fis=new FileInputStream(new File(%%1));byte[] buffer=new byte[10240];try {int byteread;while ((byteread=fis.read(buffer)) != -1) {String %%2=new String(buffer);%%3}} catch (IOException e) {e.printStackTrace();} finally{try {read.close();fis.close();} catch (IOException e) {e.printStackTrace();}}8.写入文件//import java.io.*;8.1.操作系统默认编码try {FileWriter fw = new FileWriter(%%1);fw.write(%%2);fw.flush();fw.close();} catch (IOException e) {e.printStackTrace();}8.2.UTF-8编码try {OutputStreamWriter out = new OutputStreamWriter(new FileOutputStream(%%1),"UTF-8");out.write(sb.toString());out.flush();out.close();} catch (UnsupportedEncodingException e) {e.printStackTrace();} catch (FileNotFoundException e){e.printStackTrace();} catch (IOException e){e.printStackTrace();}9.写入随机文件//import java.io.*;try {RandomAcessFile logFile=new RandomAcessFile(%%1,"rw");long lg=logFile.length();logFile.seek(%%2);logFile.writeByte(%%3);}catch(IOException ioe){System.out.println("无法写入文件："+ioe.getMessage());}10.读取文件属性//import java.io.*;// 文件属性的取得File af = new File(%%1);if (af.exists()) {System.out.println(f.getName() + "的属性如下： 文件长度为：" + f.length());System.out.println(f.isFile() ? "是文件" : "不是文件");System.out.println(f.isDirectory() ? "是目录" : "不是目录");System.out.println(f.canRead() ? "可读取" : "不");System.out.println(f.canWrite() ? "是隐藏文件" : "");System.out.println("文件夹的最后修改日期为：" + new Date(f.lastModified()));} else {System.out.println(f.getName() + "的属性如下：");System.out.println(f.isFile() ? "是文件" : "不是文件");System.out.println(f.isDirectory() ? "是目录" : "不是目录");System.out.println(f.canRead() ? "可读取" : "不");System.out.println(f.canWrite() ? "是隐藏文件" : "");System.out.println("文件的最后修改日期为：" + new Date(f.lastModified()));}if(f.canRead()){%%2}if(f.canWrite()){%%3}11.写入属性//import java.io.*;File filereadonly=new File(%%1);try {boolean %%2=filereadonly.setReadOnly();}catch (IOException e) {System.err.println("拒绝写访问："+e.printStackTrace());}12.枚举一个文件夹中的所有文件/*import java.io.*;import java.util.*;*/LinkedList<String> folderList = new LinkedList<String>();folderList.add(%%1);while (folderList.size() > 0) {File file = new File((String)folderList.poll());File[] files = file.listFiles();List<File> fileList = new ArrayList<File>();for (int i = 0; i < files.length; i++) {if (files[i].isDirectory())folderList.add(files[i].getPath());elsefileList.add(files[i]);}for (File f : fileList) {%%2=f.getAbsoluteFile();%%3}}13.复制文件夹/*import java.io.*;import java.util.*;*/LinkedList<String> folderList = new LinkedList<String>();folderList.add(%%1);LinkedList<String> folderList2 = new LinkedList<String>();folderList2.add(%%2+ %%1.substring(%%1.lastIndexOf("\\")));while (folderList.size() > 0) {(new File(folderList2.peek())).mkdirs(); // 如果文件夹不存在 则建立新文件夹File folders = new File(folderList.peek());String[] file = folders.list();File temp = null;try {for (int i = 0; i < file.length; i++) {if (folderList.peek().endsWith(File.separator))temp = new File(folderList.peek() + File.separator+ file[i]);elsetemp = new File(folderList.peek() + File.separator+ file[i]);if (temp.isFile()) {FileInputStream input = new FileInputStream(temp);FileOutputStream output = new FileOutputStream(new File(folderList2.peek() ,temp.getName().toString()));byte[] b = new byte[10240];int len;while ((len = input.read(b)) != -1)output.write(b, 0, len);output.flush();output.close();input.close();}else if (temp.isDirectory()) {// 如果是子文件夹for (File f : temp.listFiles()) {if (f.isDirectory()) {folderList.add(f.getPath());folderList2.add(folderList2.peek()+ File.separator + f.getName());}else if(f.isFile()) {FileInputStream input = new FileInputStream(f);FileOutputStream output = new FileOutputStream(folderList2.peek()+File.separator+temp.getName()+File.separator+ f.getName());byte[] b = new byte[10240];int len;while ((len = input.read(b)) != -1)output.write(b, 0, len);output.flush();output.close();input.close();}}}}} catch (IOException e) {System.err.println("复制整个文件夹内容操作出错");}folderList.removeFirst();folderList2.removeFirst();}14.复制一个目录下所有的文件夹到另一个文件夹下/*import java.io.*;import java.util.*;*/File copyfolders=new File(%%1);File[] copyfoldersList=copyfolders.listFiles();for(int k=0;k<copyfoldersList.length;k++){if(copyfoldersList[k].isDirectory()){List<String>folderList=new ArrayList<String>();folderList.add(copyfoldersList[k].getPath());List<String>folderList2=new ArrayList<String>();folderList2.add(%%2+"/"+copyfoldersList[k].getName());for(int j=0;j<folderList.size();j++){(new File(folderList2.get(j))).mkdirs(); //如果文件夹不存在 则建立新文件夹File folders=new File(folderList.get(j));String[] file=folders.list();File temp=null;try {for (int i = 0; i < file.length; i++) {if(folderList.get(j).endsWith(File.separator))temp=new File(folderList.get(j),file[i]);elsetemp=new File(folderList.get(j),file[i]);FileInputStream input = new FileInputStream(temp);if(temp.isFile()){FileOutputStream output = new FileOutputStream(new File(folderList2.get(j) ,temp.getName()).toString()));byte[] b = new byte[10240];while ( (int len = input.read(b)) != -1)output.write(b, 0, len);output.flush();output.close();input.close();}else if(temp.isDirectory()){//如果是子文件夹for (File f : temp.listFiles()) {if (f.isDirectory()) {folderList.add(f.getPath());folderList2.add(folderList2.peek()+ File.separator + f.getName());}else if(f.isFile()) {FileInputStream input = new FileInputStream(f);FileOutputStream output = new FileOutputStream(folderList2.peek()+File.separator+temp.getName()+File.separator+ f.getName());byte[] b = new byte[10240];int len;while ((len = input.read(b)) != -1) {output.write(b, 0, len);}output.flush();output.close();input.close();}}}}}}catch (IOException e) {System.err.println("复制整个文件夹内容操作出错");}}}}15.移动文件夹/*import java.io.*;import java.util.*;*/LinkedList<String> folderList = new LinkedList<String>();folderList.add(%%1);LinkedList<String> folderList2 = new LinkedList<String>();folderList2.add(%%2 + %%1.substring(%%1.lastIndexOf("\\")));while (folderList.size() > 0) {(new File(folderList2.peek())).mkdirs(); // 如果文件夹不存在 则建立新文件夹File folders = new File(folderList.peek());String[] file = folders.list();File temp = null;try {for (int i = 0; i < file.length; i++) {if (folderList.peek().endsWith(File.separator)) {temp = new File(folderList.peek() , file[i]);} else {temp = new File(folderList.peek() ,file[i]);}if (temp.isFile()) {FileInputStream input = new FileInputStream(temp);FileOutputStream output = new FileOutputStream(folderList2.peek() + File.separator+ (temp.getName()).toString());byte[] b = new byte[10240];while ((int len = input.read(b)) != -1)output.write(b, 0, len);output.flush();output.close();input.close();if (!temp.delete())//删除单个文件操作出错}else if (temp.isDirectory()) {// 如果是子文件夹for (File f : temp.listFiles()) {if (f.isDirectory()) {folderList.add(f.getPath());folderList2.add(folderList2.peek()+ File.separator + f.getName());}else if (f.isFile()) {FileInputStream input = new FileInputStream(f);FileOutputStream output = new FileOutputStream(folderList2.peek()+File.separator+temp.getName()+File.separator+ f.getName());byte[] b = new byte[10240];while ((int len = input.read(b)) != -1)output.write(b, 0, len);output.flush();output.close();input.close();if (!temp.delete())//删除单个文件操作出错}}}}} catch (IOException e) {//复制整个文件夹内容操作出错e.printStackTrace();}folderList.removeFirst();folderList2.removeFirst();}File f = new File(%%1);if (!f.delete()) {for (File file : f.listFiles()) {if (file.list().length == 0)file.delete();}}16.移动一个目录下所有的文件夹到另一个目录下/*import java.io.*;import java.util.*;*/File movefolders=new File(%%1);File[] movefoldersList=movefolders.listFiles();for(int k=0;k<movefoldersList.length;k++){if(movefoldersList[k].isDirectory()){List<String>folderList=new ArrayList<String>();folderList.add(movefoldersList[k].getPath());List<String>folderList2=new ArrayList<String>();folderList2.add(%%2+File.separator+movefoldersList[k].getName());for(int j=0;j<folderList.size();j++){(new File(folderList2.get(j))).mkdirs(); //如果文件夹不存在 则建立新文件夹File folders=new File(folderList.get(j));String[] file=folders.list();File temp=null;try {for (int i = 0; i < file.length; i++) {if(folderList.get(j).endsWith(File.separator))temp=new File(folderList.get(j),file[i]);elsetemp=new File(folderList.get(j),file[i]);FileInputStream input = new FileInputStream(temp);if(temp.isFile()){FileInputStream input = new FileInputStream(temp);FileOutputStream output = new FileOutputStream(new File(folderList2.get(j),temp.getName().toString()));byte[] b = new byte[10240];while ( (int len = input.read(b)) != -1)output.write(b, 0, len);output.flush();output.close();input.close();temp.delete();}else if(temp.isDirectory()){//如果是子文件夹for (File f : temp.listFiles()) {if (f.isDirectory()) {folderList.add(f.getPath());folderList2.add(folderList2.peek()+ File.separator + f.getName());}else if (f.isFile()) {FileInputStream input = new FileInputStream(f);FileOutputStream output = new FileOutputStream(folderList2.peek()+File.separator+temp.getName()+File.separator+ f.getName());byte[] b = new byte[10240];while ((int len = input.read(b)) != -1)output.write(b, 0, len);output.flush();output.close();input.close();if (!temp.delete())//删除单个文件操作出错}}}}catch (IOException e) {//复制整个文件夹内容操作出错e.printStackTrace();}}movefoldersList[k].delete();}}17.以一个文件夹的框架在另一个目录创建文件夹和空文件/*import java.io.*;import java.util.*;*/boolean b=false;//不创建空文件List<String>folderList=new ArrayList<String>();folderList.add(%%1);List<String>folderList2=new ArrayList<String>();folderList2.add(%%2);for(int j=0;j<folderList.size();j++){(new File(folderList2.get(j))).mkdirs(); //如果文件夹不存在 则建立新文件夹File folders=new File(folderList.get(j));String[] file=folders.list();File temp=null;try {for (int i = 0; i < file.length; i++) {if(folderList.get(j).endsWith(File.separator))temp=new File(folderList.get(j),file[i]);elsetemp=new File(folderList.get(j),file[i]);if(temp.isFile() && b)temp.createNewFile();else if(temp.isDirectory()){//如果是子文件夹folderList.add(folderList.get(j)+File.separator+file[i]);folderList2.add(folderList2.get(j)+File.separator+file[i]);}}}catch (IOException e) {//复制整个文件夹内容操作出错e.printStackTrace();}}18.复制文件//import java.io.*;File oldfile = new File(%%1);try {if (oldfile.exists()) { //文件存在时FileInputStream inStream = new FileInputStream(oldfile); //读入原文件FileOutputStream fs = new FileOutputStream(new File(%%2,oldfile.getName()));byte[] buffer = new byte[10240];int byteread;while ( (byteread = inStream.read(buffer)) != -1)fs.write(buffer, 0, byteread);inStream.close();}}catch (IOException e) {//复制单个文件操作出错e.printStackTrace();}19.复制一个目录下所有的文件到另一个目录//import java.io.*;File copyfiles=new File(%%1);File targetfiles = new File(%%2);if (!targetfiles.exists())targetfiles.mkdirs();File[] files=copyfiles.listFiles();for(int i=0;i<files.length;i++){if(files[i].isFile()){try {InputStream inStream = new FileInputStream(files[i]); //读入原文件FileOutputStream fs = new FileOutputStream(new File(%%2,files[i].getName()));byte[] buffer = new byte[10240];int byteread;while ( (byteread = inStream.read(buffer)) != -1)fs.write(buffer, 0, byteread);inStream.close();} catch (IOException e) {//复制单个文件操作出错e.printStackTrace();}}}20.提取扩展名String %%2=%%1.substring(%%1.lastIndexOf('.'));21.提取文件名String %%2=%%1.substring(%%1.lastIndexOf("\\")+1);22.提取文件路径String %%2=%%1.substring(0,%%1.lastIndexOf("\\"));23.替换扩展名//import java.io.*;File replaceExt=new File(%%1);replaceExt.renameTo(replaceExt.getName().split(".")[0]+"."+%%2);24.追加路径final String path=%%1.endsWith("\\")?%%1:%%1+"\\";%%3=path+%%2;25.移动文件//import java.io.*;File oldfile = new File(%%1);try {if (oldfile.exists()) { //文件存在时InputStream inStream = new FileInputStream(oldfile); //读入原文件FileOutputStream fs = new FileOutputStream(new File(%%2,oldfile.getName()));byte[] buffer = new byte[10240];int byteread;while ( (byteread = inStream.read(buffer)) != -1)fs.write(buffer, 0, byteread);inStream.close();oldfile.delete();}}catch (IOException e) {//复制单个文件操作出错e.printStackTrace();}26.移动一个目录下所有文件到另一个目录//import java.io.*;File movefile=new File(%%1);File[] movefiles=movefile.listFiles();for(int i=0;i<movefiles.length;i++){if(movefiles[i].isFile()){File oldfile = new File(movefiles[i]);try {if (oldfile.exists()) { //文件存在时InputStream inStream = new FileInputStream(oldfile); //读入原文件FileOutputStream fs = new FileOutputStream(new File(%%2,oldfile.getName()));byte[] buffer = new byte[10240];int byteread;while ( (byteread = inStream.read(buffer)) != -1)fs.write(buffer, 0, byteread);inStream.close();oldfile.delete();}}catch (IOException e) {//复制单个文件操作出错e.printStackTrace();}}}27.指定目录下搜索文件//import java.io.*;private static final String filter=%%1; //"*.*"private static void doSearch(String path){File file = new File(path);if(file.exists()) {if(file.isDirectory()) {File[] fileArray = file.listFiles();for(File f:fileArray) {if(f.isDirectory()) {doSearch(f.getPath());} else {if(f.getName().indexOf(filter) >= 0) {//f.getPath()}}//f.getPath()}//"The numbers of files had been found:" + countFiles} else {//"Couldn't open the path!"}} else {System.err.println("目录不存在");}}doSearch(%%1);28.打开对话框/*import java.io.*;import javax.swing.*;*/JFileChooser Jfc = new JFileChooser(); //建立选择档案对话方块盒 JfcJfc.showDialog(null, %%1);if (Jfc.getSelectedFile() != null) {File %%2 = Jfc.getSelectedFile();}29.文件分割//import java.io.*;try {File f=new File(%%1);FileInputStream fileInputStream = new FileInputStream(f);byte[] buffer = new byte[fileInputStream.available()];FileInputStream.read(buffer);fileInputStream.close();String strFileName = f.getName();FileOutputStream fileOutputStream = new FileOutputStream(new File(%%2+"\\"+ strFileName + "1"));fileOutputStream.write(buffer,0,buffer.length/2);fileOutputStream.close();fileOutputStream = new FileOutputStream(new File(%%2+"\\"+ strFileName + "2"));fileOutputStream.write(buffer, buffer.length/2, buffer.length-buffer.length/2);fileOutputStream.close();} catch (ArrayIndexOutOfBoundsException e) {e.printStackTrace();}catch(IOException e){e.printStackTrace();}30.文件合并//import java.io.*;String strFileName = %%1.substring(%%1.LastIndexOf("\\") + 1);try {FileInputStream fileInputStream1 = new FileInputStream(new File(%%2 + strFileName + "1"));FileInputStream fileInputStream2 = new FileInputStream(new File(%%2 + strFileName + "2"));byte[] buffer = new byte[fileInputStream1.available()+fileInputStream2.available()];FileInputStream.read(buffer, 0, fileInputStream1.available());FileInputStream2.read(buffer, fileInputStream1.available(), fileInputStream2.available());fileInputStream.close();fileInputStream2.close();FileOutputStream fileOutputStream = new FileOutputStream(new File(%%2+"\\"+ strFileName));fileOutputStream.write(buffer,0,buffer.length);fileOutputStream.close();}catch(IOException e){e.printStackTrace();}31.文件简单加密/*import java.io.*;import javax.swing.*;private static final String CharSet = "0123456789ABCDEF";*/JFileChooser jfc = new JFileChooser();JFileChooser jfc2 = new JFileChooser();jfc.showDialog(null, "请选择要加密编码的文件");jfc2.showDialog(null, "请选择要输出的文件名");if (jfc.getSelectedFile() != null && jfc2.getSelectedFile() != null) {File oldfile = jfc.getSelectedFile();FileInputStream inStream = null;FileWriter fw = null;try {if (oldfile.exists()) {inStream = new FileInputStream(oldfile);fw = new FileWriter(jfc2.getSelectedFile());byte[] sRead = new byte[10240];int byteread;while ((byteread = inStream.read(sRead)) != -1) {StringBuilder smi = new StringBuilder(byteread * 2);int ka = 3, kb = 5, kc = 2, kd = 7, js = 0;if (byteread % 2 != 0)js = 1;for (int i = 0; i < byteread - 1; i += 2) {char c1 = (char) sRead[i];char c2 = (char) sRead[i + 1];int tmp = ka * c1 + kc * c2;while (tmp < 0)tmp += 1024;byte s1 = (byte) (tmp % 1024);int js1 = (int) s1 >> 4 & 0xf;smi.append(CharSet.substring(js1, js1 + 1));int ks1 = s1 & 0xf;smi.append(CharSet.substring(ks1, ks1 + 1));tmp = kb * c1 + kd * c2;while (tmp < 0)tmp += 1024;byte s2 = (byte) (tmp % 1024);int js2 = (int) s2 >> 4 & 0xf;smi.append(CharSet.substring(js2, js2 + 1));int ks2 = s2 & 0xf;smi.append(CharSet.substring(ks2, ks2 + 1));}if (js == 1) {byte s3 = (byte) ((sRead[byteread - 1] - 4) % 1024);int js3 = (int) s3 >> 4 & 0xf;smi.append(CharSet.substring(js3, js3 + 1));int ks3 = (int) s3 & 0xf;smi.append(CharSet.substring(ks3, ks3 + 1));}fw.write(smi.toString());}fw.flush();}} catch (IOException e) {e.printStackTrace();} finally {try {fw.close();inStream.close();} catch (IOException e) {e.printStackTrace();}}}32.文件简单解密/*import java.io.*;import javax.swing.*;private static final String CharSet = "0123456789ABCDEF";*/private static int niyuan(int m, int n) {int a, b, c, d, t, yu = 0, shang, mod;a = m;b = n;mod = a;c = 0;d = 1;while (b < 0)b += a;if (a % b == 0 || b % 2 == 0)return 0;while (b != 1) {t = a % b;shang = a / b;a = b;b = t;yu = c - shang * d;c = d;d = yu;}if (yu < 0)yu += mod;return yu;}JFileChooser jfc = new JFileChooser();JFileChooser jfc2 = new JFileChooser();jfc.showDialog(null, "请选择要解码解密的文件");jfc2.showDialog(null, "请选择要输出的文件名");if (jfc.getSelectedFile() != null && jfc2.getSelectedFile() != null) {FileOutputStream fw = null;try {FileInputStream fis = new FileInputStream(jfc.getSelectedFile());fw = new FileOutputStream(jfc2.getSelectedFile());byte[] buffer = new byte[20480];int ka = 3, kb = 5, kc = 2, kd = 7, js = 0, tmp;int aany, ddny;int r00 = ka * kc * kd;int r01 = -ka * kb * kc;int r10 = -kb * kc * kc;int r11 = ka * kb * kc;int x00 = ka * ka * kc * kd - ka * kb * kc * kc;int x11 = ka * kb * kc * kd - kb * kb * kc * kc;while (x00 % 2 == 0) {x00 /= 2;r00 /= 2;r01 /= 2;}while (x11 % 2 == 0) {x11 /= 2;r10 /= 2;r11 /= 2;}aany = x00;ddny = x11;if (niyuan(1024, aany) != 0 && niyuan(1024, ddny) != 0) {int kn00 = r00 * niyuan(1024, x00);int kn01 = r01 * niyuan(1024, x00);int kn10 = r10 * niyuan(1024, x11);int kn11 = r11 * niyuan(1024, x11);ka = kn00;kb = kn01;kc = kn10;kd = kn11;} else {JOptionPane.showMessageDialog(null, "无逆矩阵！");System.exit(0);}while (ka < 0)ka += 1024;while (kb < 0)kb += 1024;while (kc < 0)kc += 1024;while (kd < 0)kd += 1024;ka %= 1024;kb %= 1024;kc %= 1024;kd %= 1024;try {int byteread;while ((byteread = fis.read(buffer)) != -1) {int nLen = byteread / 2;byte[] sming = new byte[nLen];String chs=new String(buffer,"US-ASCII");for (int i = 0; i < nLen; i++) {byte bTmp;if (byteread < 2)bTmp = -1;bTmp = (byte) (CharSet.indexOf(chs.substring(i * 2,i * 2+1)) * 16 + CharSet.indexOf(chs.substring(i * 2 + 1,i * 2 + 2)));sming[i] = bTmp;}if (nLen % 2 != 0)js = 1;for (int i = 0; i < nLen - 1; i += 2) {char c1 = (char) sming[i];char c2 = (char) sming[i + 1];tmp = ka * c1 + kc * c2;while (tmp < 0)tmp += 1024;char s1 = (char) (tmp % 1024);fw.write(s1);tmp = kb * c1 + kd * c2;while (tmp < 0)tmp += 1024;char s2 = (char) (tmp % 1024);fw.write(s2);}if (js == 1) {char c3 = (char) ((sming[nLen - 1] - 4) % 1024);fw.write(c3);}}fw.flush();} catch (IOException e) {e.printStackTrace();} finally {try {fis.close();fw.close();} catch (IOException e) {e.printStackTrace();}}} catch (FileNotFoundException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}}33.读取ini文件属性/*import java.io.*;import java.util.*;import java.util.regex.*;private static HashMap configMap=null;private static FileReader fileReader = null;*/private static boolean readIni() {if (configMap == null) {configMap = new HashMap<String, ArrayList>();String strLine = null;String currentNode = null;String previousNode = null;ArrayList<Properties> vec = new ArrayList<Properties>();int row = 0;BufferedReader bufferedReader = new BufferedReader(fileReader);try {while ((strLine = bufferedReader.readLine()) != null) {String oneLine = strLine.trim();if (oneLine.length() >= 1) {Pattern p = Pattern.compile("\\[\\s*.*\\s*\\]");int nodelen = oneLine.split("[;]").length;String[] strArray1 = new String[4];if (nodelen == 1) {oneLine = oneLine.split("[;]")[0].trim();} else if (nodelen == 2) {strArray1[3] = oneLine.split("[;]")[1].trim();oneLine = oneLine.split("[;]")[0].trim();}Matcher m = p.matcher(oneLine);if (m.matches()) {strArray1[0] = "@Node";strArray1[1] = oneLine;strArray1[2] = "";} else {int keylen = oneLine.split("=").length;if (keylen == 1) {strArray1[0] = "@Key";strArray1[1] = oneLine.split("=")[0];strArray1[2] = "";} else if (keylen == 2) {strArray1[0] = "@Key";strArray1[1] = oneLine.split("=")[0];strArray1[2] = oneLine.split("=")[1];} else {strArray1[0] = "@ElementError";strArray1[1] = "";strArray1[2] = "";strArray1[3] = "";}}if (strArray1[0].equals("@Node")) {previousNode = currentNode;currentNode = strArray1[1];if (row > 0) {configMap.put(previousNode, (ArrayList)vec.clone());vec.clear();row = 0;}} else if (strArray1[0].equals("@Key") && row == 0) {Properties ht = new Properties();ht.setProperty(strArray1[1], strArray1[2]);vec.add(ht);row++;} else if (strArray1[0].equals("@Key") && row > 0) {Properties ht2 = new Properties();ht2.put(strArray1[1], strArray1[2]);vec.add(ht2);row++;}}}configMap.put(currentNode, (ArrayList)vec.clone());} catch (FileNotFoundException e) {configMap = null;e.printStackTrace();return false;} catch (IOException e) {configMap = null;e.printStackTrace();return false;}}return true;}try {fileReader = new FileReader(%%1); //"Setup.ini"} catch (FileNotFoundException e1) {e1.printStackTrace();}if (readIni()) {ArrayList<Properties> li = null;li = (ArrayList<Properties>) configMap.get(%%2); //"[DataSource]"for (Properties pro : li) {if(pro.containsKey(%%3))%%4=pro.getProperty(%%3);}}try {fileReader.close();} catch (IOException e) {e.printStackTrace();}34.合并一个目录下所有的文件//import java.io.*;File combinefiles=new File(%%1);File[] files=combinefiles.listFiles();FileOutputStream fs;try {fs=new FileOutputStream(new File(%%2));}catch(IOException e){e.printStackTrace();}for(int i=0;i<files.length;i++){if(files[i].isFile()){try {FileInputStream inStream=new FileInputStream(files[i]);byte[] buffer = new byte[10240];int byteread;while((byteread=inStream.read(buffer))!=-1)fs.write(buffer,0,byteread);inStream.close();}catch(Exception e){//复制文件出错e.printStackTrace();}}}try {fs.close();}catch(IOException e){e.printStackTrace();}35.写入ini文件属性/*import java.io.*;import java.util.*;import java.util.regex.*;private static HashMap configMap=null;*/if (readIni()) {ArrayList<Properties> li = null;try {FileWriter fw = new FileWriter(%%1);li = (ArrayList<Properties>) configMap.get(%%2); //"[DataSource]"fw.write("%%2\r\n");for (Properties pro : li) {if (pro.containsKey(%%3)) //"ip"fw.write("%%3=" + %%6 + "\r\n");}fw.flush();fw.close();} catch (IOException e) {e.printStackTrace();}}36.获得当前路径String %%1=getClass().getResource("/").getPath();//String %%1=System.getProperty("user.dir");37.读取XML数据库/*import java.io.*;import javax.xml.parsers.*;import org.w3c.dom.*;private static Document document;private static Element node;*/File xml_file = new File(%%1);DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();try {DocumentBuilder builder = factory.newDocumentBuilder();document = builder.parse(xml_file);} catch (Exception e) {e.printStackTrace();}String subNodeTag = %%2;Element rootNode = document.getDocumentElement();//%%2="Product" //%%4="id" //%%6="port"//%%3="Name" //%%5="001"NodeList nlist = rootNode.getElementsByTagName(subNodeTag);int len = nlist.getLength();for (int i = 0; i < len; i++) {node = nlist.item(i);String getNodeAttrValue = null;NamedNodeMap attrList = node.getAttributes();for (int j = 0; j < attrList.getLength(); j++) {if (attrList.item(j).getNodeName().equals(%%4)) {getNodeAttrValue = attrList.item(j).getNodeValue();break;}}if (getNodeAttrValue.equals(%%5)) {nlist = node.getChildNodes();String %%9=((Element) node).getElementsByTagName(%%3).item(0).getFirstChild().getNodeValue();break;}}38.写入XML数据库/*import java.io.*;import javax.xml.parsers.*;import org.w3c.dom.*;import javax.xml.transform.*;import javax.xml.transform.dom.*;import javax.xml.transform.stream.*;private Document document;private Element node;*/File xml_file = new File(%%1);DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();try {DocumentBuilder builder = factory.newDocumentBuilder();document = builder.parse(xml_file);} catch (Exception e) {e.printStackTrace();}String subNodeTag = %%2;Element rootNode = document.getDocumentElement();// %%2="Product" //%%4="pid" //%%6="author"// %%3="Name" //%%5="price"NodeList nlist = rootNode.getElementsByTagName(subNodeTag);String ss = null;int len = nlist.getLength();for (int i = 0; i < len; i++) {node = (Element) nlist.item(i);//node.setAttribute(%%4, "0"+String.valueOf(i)); //ID格式化String getNodeAttrValue = null;NamedNodeMap attrList = node.getAttributes();for (int j = 0; j < attrList.getLength(); j++) {if (attrList.item(j).getNodeName().equals(%%4)) {getNodeAttrValue = attrList.item(j).getNodeValue();break;}}if (getNodeAttrValue.equals("001")) {nlist = node.getChildNodes();ss = ((Element) node).getElementsByTagName(%%3).item(0).getFirstChild().getNodeValue();ss = ((Element) node).getElementsByTagName(%%6).item(0).getFirstChild().getNodeValue();ss = ((Element) node).getElementsByTagName(%%5).item(0).getFirstChild().getNodeValue();((Element) node).getElementsByTagName(%%3).item(0).getFirstChild().setTextContent(%%7);((Element) node).getElementsByTagName(%%6).item(0).getFirstChild().setTextContent(%%8);((Element) node).getElementsByTagName(%%5).item(0).getFirstChild().setTextContent(%%9);break;}}if (ss == null) {node = document.createElement(%%2);node.setAttribute(%%4, String.valueOf(nlist.getLength() + 1));node.appendChild(document.createTextNode("\n"));Element server = document.createElement(%%3);server.appendChild(document.createTextNode(%%7));node.appendChild(server);Element ipNode = document.createElement(%%6);ipNode.appendChild(document.createTextNode(%%8));node.appendChild(ipNode);node.appendChild(document.createTextNode("\n"));Element port = document.createElement(%%5);port.appendChild(document.createTextNode(%%9));node.appendChild(port);node.appendChild(document.createTextNode("\n"));rootNode.appendChild(node);}TransformerFactory tFactory = TransformerFactory.newInstance();Transformer transformer = null;try {transformer = tFactory.newTransformer();DOMSource source = new DOMSource(document);StreamResult result = new StreamResult(xml_file);transformer.transform(source, result);} catch (IOException e) {e.printStackTrace();}39.ZIP压缩文件/*import java.io.*;import java.util.zip.*;*///创建文件输入流对象FileInputStream fis=new FileInputStream(%%1);//创建文件输出流对象FileOutputStream fos=new FileOutputStream(%%2);//创建ZIP数据输出流对象ZipOutputStream zipOut=new ZipOutputStream(fos);//创建指向压缩原始文件的入口ZipEntry entry=new ZipEntry(args[0]);try {zipOut.putNextEntry(entry);//向压缩文件中输出数据int nNumber;byte[] buffer=new byte[1024];while((nNumber=fis.read(buffer))!=-1)zipOut.write(buffer,0,nNumber);//关闭创建的流对象zipOut.close();fos.close();fis.close();}catch(IOException e){e.printStackTrace();}40.ZIP解压缩/*import java.io.*;import java.util.zip.*;*///创建文件输入流对象实例FileInputStream fis=new FileInputStream(%%1);//创建ZIP压缩格式输入流对象实例ZipInputStream zipin=new ZipInputStream(fis);//创建文件输出流对象实例FileOutputStream fos=new FileOutputStream(%%2);//获取Entry对象实例ZipEntry entry=zipin.getNextEntry();byte[] buffer=new byte[1024];int nNumber;try{while((nNumber=zipin.read(buffer,0,buffer.length))!=-1)fos.write(buffer,0,nNumber);//关闭文件流对象zipin.close();fos.close();fis.close();}catch(IOException e) {e.printStackTrace();}41.获得应用程序完整路径String %%1=System.getProperty("user.dir");42.递归删除目录中的文件/*import java.io.*;import java.util.*;*/ArrayList<String> folderList = new ArrayList<String>();folderList.add(%%1);for (int j = 0; j < folderList.size(); j++) {File file = new File(folderList.get(j));File[] files = file.listFiles();ArrayList<File> fileList = new ArrayList<File>();for (int i = 0; i < files.length; i++) {if (files[i].isDirectory()) {folderList.add(files[i].getPath());} else {fileList.add(files[i]);}}for (File f : fileList) {f.delete();}}43.ZIP压缩文件夹/*import java.io.*;import java.util.*;import java.util.zip.*;*/public static String zipFileProcess(ArrayList outputZipFileNameList, String outputZipNameAndPath) {ArrayList fileNames = new ArrayList();ArrayList files = new ArrayList();FileOutputStream fileOut = null;ZipOutputStream outputStream = null;FileInputStream fileIn = null;StringBuffer sb = new StringBuffer(outputZipNameAndPath);// FileInputStream fileIn =null;try {if (outputZipNameAndPath.indexOf(".zip") != -1) {outputZipNameAndPath = outputZipNameAndPath;} else {sb.append(".zip");outputZipNameAndPath = sb.toString();}fileOut = new FileOutputStream(outputZipNameAndPath);outputStream = new ZipOutputStream(fileOut);int outputZipFileNameListSize = 0;if (outputZipFileNameList != null) {outputZipFileNameListSize = outputZipFileNameList.size();}for (int i = 0; i < outputZipFileNameListSize; i++) {File rootFile = new File(outputZipFileNameList.get(i).toString());listFile(rootFile, fileNames, files, "");}for (int loop = 0; loop < files.size(); loop++) {fileIn = new FileInputStream((File) files.get(loop));outputStream.putNextEntry(new ZipEntry((String) fileNames.get(loop)));byte[] buffer = new byte[1024];while (fileIn.read(buffer) != -1) {outputStream.write(buffer);}outputStream.closeEntry();fileIn.close();}return outputZipNameAndPath;} catch (IOException ioe) {return null;} finally {if (outputStream != null) {try {outputStream.close();} catch (IOException e) {}}if (fileIn != null) {try {fileIn.close();} catch (IOException e) {}}}}private static void listFile(File parentFile, List nameList, List fileList, String directoryName) {if (parentFile.isDirectory()) {File[] files = parentFile.listFiles();for (int loop = 0; loop < files.length; loop++) {listFile(files[loop], nameList, fileList, directoryName + parentFile.getName() + "/");}} else {fileList.add(parentFile);nameList.add(directoryName + parentFile.getName());}}String savePath=%%1;ArrayList<String> outputZipFileName=new ArrayList<String>();outputZipFileName.add(%%2);zipFileProcess(outputZipFileName,savePath);44.IDEA加密算法private byte[] bytekey;public byte[] getKey(String key){int len1 =key.length();if (len1>=16) {key=key.substring(0, 16);} else {for (int i=0;i<16-len1;i++){key=key.concat("0");}}bytekey=key.getBytes();return bytekey;}/*** 加密String明文输入,String密文输出* @param strMing* @return*/public String getEncString(String strMing) {byte[] byteMi = null;byte[] byteMing = null;String strMi = "";try {return byte2hex(IdeaEncrypt(bytekey,strMing.getBytes(),true) );}catch(Exception e){e.printStackTrace();}finally {byteMing = null;byteMi = null;}return strMi;}/*** 解密 以String密文输入,String明文输出* @param strMi* @return*/public String getDesString(String strMi) {byte[] byteMing = null;byte[] byteMi = null;String strMing = "";try {String tmp= new String(IdeaEncrypt(bytekey,hex2byte(strMi.getBytes()),false ));int len1=tmp.length();return tmp.substring(0, len1-6);}catch(Exception e) {e.printStackTrace();}finally {byteMing = null;byteMi = null;}return strMing;}private byte[] Encrypt(byte[] bytekey, byte[] inputBytes, boolean flag) {byte[] encryptCode = new byte[8];// 分解子密钥int[] key = get_subkey(flag, bytekey);// 进行加密操作encrypt(key, inputBytes, encryptCode);// 返回加密数据return encryptCode;}private int bytesToInt(byte[] inBytes, int startPos) {return ((inBytes[startPos] << 8) & 0xff00) +(inBytes[startPos + 1] & 0xff);}private void intToBytes(int inputInt, byte[] outBytes, int startPos) {outBytes[startPos] = (byte) (inputInt >>> 8);outBytes[startPos + 1] = (byte) inputInt;}private int x_multiply_y(int x, int y) {if (x == 0) {x = 0x10001 - y;} else if (y == 0) {x = 0x10001 - x;} else {int tmp = x * y;y = tmp & 0xffff;x = tmp >>> 16;x = (y - x) + ((y < x) ? 1 : 0);}return x & 0xffff;}private void encrypt(int[] key, byte[] inbytes, byte[] outbytes) {int k = 0;int a = bytesToInt(inbytes, 0);int b = bytesToInt(inbytes, 2);int c = bytesToInt(inbytes, 4);int d = bytesToInt(inbytes, 6);for (int i = 0; i < 8; i++) {a = x_multiply_y(a, key[k++]);b += key[k++];b &= 0xffff;c += key[k++];c &= 0xffff;d = x_multiply_y(d, key[k++]);int tmp1 = b;int tmp2 = c;c ^= a;b ^= d;c = x_multiply_y(c, key[k++]);b += c;b &= 0xffff;b = x_multiply_y(b, key[k++]);c += b;c &= 0xffff;a ^= b;d ^= c;b ^= tmp2;c ^= tmp1;}intToBytes(x_multiply_y(a, key[k++]), outbytes, 0);intToBytes(c + key[k++], outbytes, 2);intToBytes(b + key[k++], outbytes, 4);intToBytes(x_multiply_y(d, key[k]), outbytes, 6);}private int[] encrypt_subkey(byte[] byteKey) {int[] key = new int[52];if (byteKey.length < 16) {byte[] tmpkey = new byte[16];System.arraycopy(byteKey, 0, tmpkey,tmpkey.length - byteKey.length, byteKey.length);byteKey = tmpkey;}for (int i = 0; i < 8; i++) {key[i] = bytesToInt(byteKey, i * 2);}for (int j = 8; j < 52; j++) {if ((j & 0x7) < 6) {key[j] = (((key[j - 7] & 0x7f) << 9) | (key[j - 6] >> 7)) &0xffff;} else if ((j & 0x7) == 6) {key[j] = (((key[j - 7] & 0x7f) << 9) | (key[j - 14] >> 7)) &0xffff;} else {key[j] = (((key[j - 15] & 0x7f) << 9) | (key[j - 14] >> 7)) &0xffff;}}return key;}private int fun_a(int a) {if (a < 2) {return a;}int b = 1;int c = 0x10001 / a;for (int i = 0x10001 % a; i != 1;) {int d = a / i;a %= i;b = (b + (c * d)) & 0xffff;if (a == 1) {return b;}d = i / a;i %= a;c = (c + (b * d)) & 0xffff;}return (1 - c) & 0xffff;}private int fun_b(int b) {return (0 - b) & 0xffff;}private int[] uncrypt_subkey(int[] key) {int dec = 52;int asc = 0;int[] unkey = new int[52];int aa = fun_a(key[asc++]);int bb = fun_b(key[asc++]);int cc = fun_b(key[asc++]);int dd = fun_a(key[asc++]);unkey[--dec] = dd;unkey[--dec] = cc;unkey[--dec] = bb;unkey[--dec] = aa;for (int k1 = 1; k1 < 8; k1++) {aa = key[asc++];bb = key[asc++];unkey[--dec] = bb;unkey[--dec] = aa;aa = fun_a(key[asc++]);bb = fun_b(key[asc++]);cc = fun_b(key[asc++]);dd = fun_a(key[asc++]);unkey[--dec] = dd;unkey[--dec] = bb;unkey[--dec] = cc;unkey[--dec] = aa;}aa = key[asc++];bb = key[asc++];unkey[--dec] = bb;unkey[--dec] = aa;aa = fun_a(key[asc++]);bb = fun_b(key[asc++]);cc = fun_b(key[asc++]);dd = fun_a(key[asc]);unkey[--dec] = dd;unkey[--dec] = cc;unkey[--dec] = bb;unkey[--dec] = aa;return unkey;}private int[] get_subkey(boolean flag, byte[] bytekey) {if (flag) {return encrypt_subkey(bytekey);} else {return uncrypt_subkey(encrypt_subkey(bytekey));}}private byte[] ByteDataFormat(byte[] data, int unit) {int len = data.length;int padlen = unit - (len % unit);int newlen = len + padlen;byte[] newdata = new byte[newlen];System.arraycopy(data, 0, newdata, 0, len);for (int i = len; i < newlen; i++)newdata[i] = (byte) padlen;return newdata;}public byte[] IdeaEncrypt(byte[] idea_key, byte[] idea_data, boolean flag) {byte[] format_key = ByteDataFormat(idea_key, 16);byte[] format_data = ByteDataFormat(idea_data, 8);int datalen = format_data.length;int unitcount = datalen / 8;byte[] result_data = new byte[datalen];for (int i = 0; i < unitcount; i++) {byte[] tmpkey = new byte[16];byte[] tmpdata = new byte[8];System.arraycopy(format_key, 0, tmpkey, 0, 16);System.arraycopy(format_data, i * 8, tmpdata, 0, 8);byte[] tmpresult = Encrypt(tmpkey, tmpdata, flag);System.arraycopy(tmpresult, 0, result_data, i * 8, 8);}return result_data;}/*** 二行制转字符串* @param b* @return*/public static String byte2hex(byte[] b) { //一个字节的数，// 转成16进制字符串String hs = "";String stmp = "";for (int n = 0; n < b.length; n++) {//整数转成十六进制表示stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));if (stmp.length() == 1)hs = hs + "0" + stmp;elsehs = hs + stmp;}return hs.toUpperCase(); //转成大写}public static byte[] hex2byte(byte[] b) {if((b.length%2)!=0)throw new IllegalArgumentException("长度不是偶数");byte[] b2 = new byte[b.length/2];for (int n = 0; n < b.length; n+=2) {String item = new String(b,n,2);// 两位一组，表示一个字节,把这样表示的16进制字符串，还原成一个进制字节b2[n/2] = (byte)Integer.parseInt(item,16);}return b2;}public static void main(String[] args) {IDEA idea = new IDEA();idea.getKey("aadd");//生成密匙String strEnc = idea.getEncString("1234567890");//加密字符串,返回String的密文System.out.println(strEnc);String strDes = idea.getDesString(strEnc);//把String 类型的密文解密System.out.println(strDes);// String key = "0000000000000000";// String data = "11111111冯";// byte[] bytekey = key.getBytes();// byte[] bytedata = data.getBytes();//// IDEA idea = new IDEA();// byte[] encryptdata = idea.IdeaEncrypt(bytekey, bytedata, true);// byte[] decryptdata = idea.IdeaEncrypt(bytekey, encryptdata, false);//// System.out.println("--------------------------------");//// for (int i = 0; i < bytedata.length; i++) {// System.out.print(" " + bytedata[i] + " ");// }//// System.out.println("");//// for (int i = 0; i < encryptdata.length; i++) {// System.out.print(" " + encryptdata[i] + " ");// }//// System.out.println("");//// for (int i = 0; i < decryptdata.length; i++) {// System.out.print(" " + decryptdata[i] + " ");// }}45.验证Schema/*import javax.xml.*;import javax.xml.transform.stream.*;import javax.xml.validation.*;import org.xml.sax.*;*/SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);StreamSource ss = new StreamSource(%%1); //"mySchema.xsd"try {Schema schema = factory.newSchema(ss);} catch (SAXException e) {e.printStackTrace();}46.Grep/*import java.util.regex.*;import java.io.*;*/throws ExceptionPattern pattern = Pattern.compile(%%1); // 第一个参数为需要匹配的字符串Matcher matcher = pattern.matcher("");String file = %%2;BufferedReader br = null;String line;try {br = new BufferedReader (new FileReader (file)); // 打开文件} catch (IOException e) {// 没有打开文件，则产生异常System.err.println ("Cannot read '" + file+ "': " + e.getMessage());}while ((line = br.readLine()) != null) { // 读入一行，直到文件结束matcher.reset (line); // 匹配字符串if (matcher.find()) { // 如果有匹配的字符串，则输出//line}}br.close(); // 关闭文件47.直接创建多级目录//import java.io.*;File f=new File(%%1);f.mkdirs();48.批量重命名//import java.io.*;File target = new File("%%1");String[] files = target.list();File f = null;String filename = null;for (String file : files) {f = new File(target, file);filename = f.getName();if (filename.substring(filename.lastIndexOf('.')).equalsIgnoreCase("%%2")) {f.renameTo(new File(target.getAbsolutePath(), filename.replace("%%2", "%%3")));// 这里可以反复使用replace替换,当然也可以使用正则表达式来替换了 ".txt" ".bat"}}49.文本查找替换//import java.nio.*;String s1=%%1;String s2=%%2;String s3=%%3;int pos=%%4;/*变量i和j分别表示主串和模式串中当前字符串的位置，k表示匹配次数*/int i,j,k=0;i = pos;j = 0;//将s1转化成StringBuffer型进行操作repStr = new StringBuffer(s1);while(i<repStr.length()&&j<s2.length()){if(repStr.charAt(i) == s2.charAt(j)){++i; ++j;if(j==s2.length()){/*j=s2.length()表示字符串匹配成功，匹配次数加1，此外对主串进行字符串替换*/k = k+1;repStr.replace(i-j,i,s3);//将j进行重新赋值开始新的比较j = 0;}}else {i = i-j+1; j = 0;}}return k;50.文件关联//import java.io.*;try {Runtime.getRuntime().exec(%%1); //"assoc .txt =mynote" "assoc [.ext[=[filetype]]]"} catch (IOException e) {e.printStackTrace();}51.批量转换编码从GB2312到Unicode52.设置JDK环境变量@echo offIF EXIST %1\bin\java.exe (rem 如输入正确的 Java2SDK 安装目录，开始设置环境变量@setx JAVA_HOME %1@setx path %path%;%JAVA_HOME%\bin@setx classpath %classpath%;.@setx classpath %classpath%;%JAVA_HOME%\lib\tools.jar@setx classpath %classpath%;%JAVA_HOME%\lib\dt.jar@setx classpath %classpath%;%JAVA_HOME%\jre\lib\rt.jar@echo on@echo Java 2 SDK 环境参数设置完毕，正常退出。) ELSE (IF "%1"=="" (rem 如没有提供安装目录，提示之后退出@echo on@echo 没有提供 Java2SDK 的安装目录,不做任何设置，现在退出环境变量设置。) ELSE (rem 如果提供非空的安装目录但没有bin\java.exe，则指定的目录为错误的目录@echo on@echo 非法的 Java2SDK 的安装目录,不做任何设置，现在退出环境变量设置。))//http://sourceforge.net/projects/jregistrykey///import ca.beq.util.win32.registry.*;//import java.util.*;1.打开键RegistryKey r = new RegistryKey(RootKey.HKEY_LOCAL_MACHINE, "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Shell Folders");2.添加键RegistryKey r = new RegistryKey(RootKey.HKEY_CURRENT_USER, "Software\\BEQ Technologies");r.create();9.写入字符串值RegistryKey r = new RegistryKey(RootKey.HKEY_CURRENT_USER, "Software\\BEQ Technologies");RegistryValue v = new RegistryValue("myVal", ValueType.REG_SZ, "data");r.setValue(v);6.获取DWORD值RegistryKey r = new RegistryKey(RootKey.HKEY_CURRENT_USER, "Software\\BEQ Technologies");if(r.hasValue("myValue")) {RegistryValue v = r.getValue("myValue");v.setType(ValueType.REG_DWORD);} // if53.批量转换编码从Unicode到GB231254.删除空文件夹//import java.io.*;File f=new File(%%1);if (isFolerNull(f)) {for (File file :f.listFiles()) {if (file.list().length == 0)file.delete();}}55.GB2312文件转UTF-8格式//import java.io.*;public class CharsetConvertor {public static void main(String[] args) {String str = "This is a test for *中网!@#$。，？";try {File f = new File("D:/test.txt");FileOutputStream fio = new FileOutputStream(f);String s = gbToUtf8(str);fio.write(s.getBytes("UTF-8"));fio.close();}catch (Exception e) {e.printStackTrace();}}public static String gbToUtf8(String str) throws UnsupportedEncodingException {StringBuffer sb = new StringBuffer();for (int i = 0; i < str.length(); i++) {String s = str.substring(i, i + 1);if (s.charAt(0) > 0x80) {byte[] bytes = s.getBytes("Unicode");String binaryStr = "";for (int j = 2; j < bytes.length; j += 2) {// the first byteString hexStr = getHexString(bytes[j + 1]);String binStr = getBinaryString(Integer.valueOf(hexStr, 16));binaryStr += binStr;// the second bytehexStr = getHexString(bytes[j]);binStr = getBinaryString(Integer.valueOf(hexStr, 16));binaryStr += binStr;}// convert unicode to utf-8String s1 = "1110" + binaryStr.substring(0, 4);String s2 = "10" + binaryStr.substring(4, 10);String s3 = "10" + binaryStr.substring(10, 16);byte[] bs = new byte[3];bs[0] = Integer.valueOf(s1, 2).byteValue();bs[1] = Integer.valueOf(s2, 2).byteValue();bs[2] = Integer.valueOf(s3, 2).byteValue();String ss = new String(bs, "UTF-8");sb.append(ss);} else {sb.append(s);}}return sb.toString();}private static String getHexString(byte b) {String hexStr = Integer.toHexString(b);int m = hexStr.length();if (m < 2) {hexStr = "0" + hexStr;} else {hexStr = hexStr.substring(m - 2);}return hexStr;}private static String getBinaryString(int i) {String binaryStr = Integer.toBinaryString(i);int length = binaryStr.length();for (int l = 0; l < 8 - length; l++) {binaryStr = "0" + binaryStr;}return binaryStr;}}56.UTF-8文件转GB2312格式private String utf8Togb2312(String str){StringBuffer sb = new StringBuffer();for(int i=0; i<str.length(); i++) {char c = str.charAt(i);switch (c) {case '+':sb.append(' ');break;case '%':try {sb.append((char)Integer.parseInt(str.substring(i+1,i+3),16));}catch (NumberFormatException e) {throw new IllegalArgumentException();}i += 2;break;default:sb.append(c);break;}}// Undo conversion to external encodingString result = sb.toString();String res=null;try{byte[] inputBytes = result.getBytes("8859_1");res= new String(inputBytes,"UTF-8");}catch(Exception e){}return res;}57.获取文件路径的父路径String %%2=%%1.substring(0,%%1.lastIndexOf("\\"));58.Unicode文件转UTF-8格式try {// Convert from Unicode to UTF-8String string = "abc\u5639\u563b";byte[] utf8 = string.getBytes("UTF-8");// Convert from UTF-8 to Unicodestring = new String(utf8, "UTF-8");} catch (UnsupportedEncodingException e) {}/*** unicode 转换成 utf-8* @author fanhui* 2007-3-15* @param theString* @return*/public static String unicodeToUtf8(String theString) {char aChar;int len = theString.length();StringBuffer outBuffer = new StringBuffer(len);for (int x = 0; x < len;) {aChar = theString.charAt(x++);if (aChar == '\\') {aChar = theString.charAt(x++);if (aChar == 'u') {// Read the xxxxint value = 0;for (int i = 0; i < 4; i++) {aChar = theString.charAt(x++);switch (aChar) {case '0':case '1':case '2':case '3':case '4':case '5':case '6':case '7':case '8':case '9':value = (value << 4) + aChar - '0';break;case 'a':case 'b':case 'c':case 'd':case 'e':case 'f':value = (value << 4) + 10 + aChar - 'a';break;case 'A':case 'B':case 'C':case 'D':case 'E':case 'F':value = (value << 4) + 10 + aChar - 'A';break;default:throw new IllegalArgumentException("Malformed \\uxxxx encoding.");}}outBuffer.append((char) value);} else {if (aChar == 't')aChar = '\t';else if (aChar == 'r')aChar = '\r';else if (aChar == 'n')aChar = '\n';else if (aChar == 'f')aChar = '\f';outBuffer.append(aChar);}} elseoutBuffer.append(aChar);}return outBuffer.toString();}59.CRC循环冗余校验/*import java.nio.*;import java.util.zip.*;*/try {FileInputStream in = new FileInputStream(%%1);FileChannel channel = in.getChannel();CRC32 crc = new CRC32();int length = (int)channel.size();MappedByteBuffer buffer = channel.map(FileChannel.MapMode.READ_ONLY, 0, length);for(int i = 0;i<length;i++){int c = buffer.get(i);crc.update(c);}System.out.println("crc校验和："+(Long.toHexString(crc.getValue())).toUpperCase());} catch (Exception e) {e.printStackTrace();}60.判断是否为空文件//import java.io.*;FileReader fr=new FileReader(%%1);if(fr.read()==1)//空白文件61.终止程序Runtime.exec("taskkill /F /IM %%1.exe");62.定时关机import java.awt.*;import java.awt.event.*;import java.awt.geom.*;import java.util.*;import javax.swing.*;public class ClockFrame extends JFrame {private JComboBox hourBox, minuteBox, secondBox;private int hour, minute, second, totalSeconds, currentSeconds;private long argue;private GregorianCalendar calendar;private boolean change = true;private static final int WIDTH = 200;private static final int HEIGHT = 150;public ClockFrame() {setTitle("关机定时");setSize(200, 150);Container contentPanel = getContentPane();JPanel timePanel = new JPanel();timePanel.setLayout(new GridLayout(4, 2));JLabel minuteLable = new JLabel("设置分钟");timePanel.add(minuteLable);minuteBox = new JComboBox();timePanel.add(minuteBox);for (int i = 0; i < 60; i++) {minuteBox.addItem(i);}minuteBox.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent evt) {minute = ((Integer) minuteBox.getSelectedItem()).intValue();}});JLabel secondLable = new JLabel("设置秒钟");timePanel.add(secondLable);secondBox = new JComboBox();timePanel.add(secondBox);for (int i = 0; i < 60; i++) {secondBox.addItem(i);}secondBox.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent evt) {second = ((Integer) secondBox.getSelectedItem()).intValue();}});contentPanel.add(timePanel, BorderLayout.CENTER);JButton check = new JButton("确定");contentPanel.add(check, BorderLayout.SOUTH);check.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent evt) {JButton check=(JButton) evt.getSource();if (check.getText().equals("确定")) {calendar = new GregorianCalendar();int currentSeconds = calendar.get(Calendar.HOUR_OF_DAY)* 3600 + calendar.get(Calendar.MINUTE) * 60+ calendar.get(Calendar.SECOND);totalSeconds = hour * 3600 + minute * 60 + second;if (totalSeconds - currentSeconds >= 0) {argue = (totalSeconds - currentSeconds) * 1000;JOptionPane.showMessageDialog(ClockFrame.this,"您设置的时间为 " + hour + ":" + minute + ":" + second+ "\n程序将在后台运行，并在此时自动关闭计算机！", "设置成功",JOptionPane.INFORMATION_MESSAGE);hideFrame();}try {// Thread.sleep(argue);//这句没用Runtime.getRuntime().exec("shutdown.exe -s -c \"我要关机了噢！不好意思！\" -t "+ totalSeconds);check.setText("取消");} catch (Exception e) {e.printStackTrace();}}else{try {Runtime.getRuntime().exec("shutdown.exe -a");check.setText("确定");} catch (Exception e) {e.printStackTrace();}}}});}private void hideFrame() {this.setVisible(false);}public static void main(String[] args) {JFrame frame = new ClockFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setLocationByPlatform(true);frame.show();}}63.显示进程列表//import java.io.*;BufferedReader br=null;try {Process proc=Runtime.getRuntime().exec("tasklist");br=new BufferedReader(new InputStreamReader(proc.getInputStream()));@SuppressWarnings("unused")String line=null;while((line=br.readLine())!=null){//br.readLine()}} catch (IOException e) {e.printStackTrace();}finally{if(br!=null){try {br.close();} catch (Exception e) {e.printStackTrace();}}}64.遍历文件夹列出文件大小65.目录下所有文件移动到整合操作/*import java.io.*;import java.util.*;import javax.swing.*;*/JFileChooser Jfc = new JFileChooser("请选择源路径"); // 建立选择档案对话方块盒 JfcJfc.showDialog(null, %%1);if (!Jfc.getSelectedFile() != null) {return;}String %%1 = Jfc.getSelectedFile().getParent();Jfc = new JFileChooser("请选择目标路径"); // 建立选择档案对话方块盒 JfcJfc.showDialog(null, %%1);if (!Jfc.getSelectedFile() != null) {return;}String %%2 = Jfc.getSelectedFile().getParent();66.对目标压缩文件解压缩到指定文件夹/*import java.io.*;import java.util.zip.*;*/String zipFileName=%%1;String extPlace=%%2;File myFolderPath = new File(extPlace);try {if (!myFolderPath.exists()) {myFolderPath.mkdir();}} catch (Exception e) {//新建目录操作出错e.printStackTrace();return;}try {ZipInputStream in = new ZipInputStream(new FileInputStream(zipFileName));ZipEntry entry = null;while ((entry = in.getNextEntry()) != null) {String entryName = entry.getName();File file = new File(extPlace , entryName);if (entry.isDirectory()) {file.mkdirs();} else {FileOutputStream os = new FileOutputStream(file);// Transfer bytes from the ZIP file to the output// filebyte[] buf = new byte[10240];int len;while ((len = in.read(buf)) > 0) {os.write(buf, 0, len);}os.close();in.closeEntry();}}} catch (IOException e) {e.printStackTrace();}67.创建目录副本整合操作/*import java.io.*;import java.util.*;import javax.swing.*;*/JFileChooser Jfc = new JFileChooser("请选择源路径"); // 建立选择档案对话方块盒 JfcJfc.showDialog(null, %%1);if (!Jfc.getSelectedFile() != null) {return;}String %%1 = Jfc.getSelectedFile().getParent();Jfc = new JFileChooser("请选择目标路径"); // 建立选择档案对话方块盒 JfcJfc.showDialog(null, %%1);if (!Jfc.getSelectedFile() != null) {return;}String %%2 = Jfc.getSelectedFile().getParent();68.打开网页//import java.io.*;try{String command = "C:\\Program Files\\Internet Explorer\\Iexplore.exe "+%%1;Runtime.getRuntime().exec(command);} catch (IOException ex) {ex.printStackTrace();}69.删除空文件夹整合操作/*import java.io.*;import java.util.*;import javax.swing.*;*/70.获取磁盘所有分区，把结果放在数组drives中String root; //root代表盘符路径for(i=0;i<20;i++) //0-20代表最大的盘符数{root.Format("%c:\\",allfenqu[i]);if(GetDriveType(root)==5)allfenqu[i]='\0';}但我用这样的代码时结果却无法去掉光驱盘符，allfenqu[]中还是会包含光驱盘符：String root;for(i=0;i<20;i++){root=allfenqu[i]+":\\";if(GetDriveType(root)==5)allfenqu[i]='\0';}71.激活一个程序或程序关联的文件//import java.io.*;try {Runtime.getRuntime().exec(%%1);} catch (IOException e) {e.printStackTrace();}72.MP3播放//必须下载 jmf包//import javax.media.bean.playerbean.MediaPlayer; //必须下载 jmf 媒体播放包MediaPlayer player;player = new MediaPlayer();setLayout(new FlowLayout());try{player.setMediaLocation("file:/F:\\音乐\\mp3\\黑白配.mp3");// <<file:/>>不能删除 音频文件路径} catch (Exception e) {System.err.println("文件不存在");}player.start();player.stop();73.WAV播放/*import javax.sound.sampled.*;import java.io.*;*/private AudioFormat format;private byte[] samples;private String filename;try {// open the audio input streamAudioInputStream stream =AudioSystem.getAudioInputStream(new File(filename));format = stream.getFormat();// get the audio samplessamples = getSamples(stream);}catch (UnsupportedAudioFileException ex) {ex.printStackTrace();}catch (IOException ex) {ex.printStackTrace();}private byte[] getSamples(AudioInputStream audioStream) {// get the number of bytes to readint length = (int)(audioStream.getFrameLength() * format.getFrameSize());// read the entire streambyte[] samples = new byte[length];DataInputStream is = new DataInputStream(audioStream);try {is.readFully(samples);}catch (IOException ex) {ex.printStackTrace();}// return the samplesreturn samples;}public void play(InputStream source) {// use a short, 100ms (1/10th sec) buffer for real-time// change to the sound streamint bufferSize = format.getFrameSize() *Math.round(format.getSampleRate() / 10);byte[] buffer = new byte[bufferSize];// create a line to play toSourceDataLine line;try {DataLine.Info info =new DataLine.Info(SourceDataLine.class, format);line = (SourceDataLine)AudioSystem.getLine(info);line.open(format, bufferSize);}catch (LineUnavailableException ex) {ex.printStackTrace();return;}// start the lineline.start();// copy data to the linetry {int numBytesRead = 0;while (numBytesRead != -1) {numBytesRead =source.read(buffer, 0, buffer.length);if (numBytesRead != -1) {line.write(buffer, 0, numBytesRead);}}}catch (IOException ex) {ex.printStackTrace();}// wait until all data is played, then close the lineline.drain();line.close();}throws ExceptionString filename=%%1;InputStream stream =new ByteArrayInputStream(sound.getSamples());// play the soundsound.play(stream);74.写图像到剪切板/*import java.awt.*;import java.awt.datatransfer.*;import java.io.*;private final Image image;*/Transferable trans = new Transferable() {public DataFlavor[] getTransferDataFlavors() {return new DataFlavor[] { DataFlavor.imageFlavor };}public boolean isDataFlavorSupported(DataFlavor flavor) {return DataFlavor.imageFlavor.equals(flavor);}public Object getTransferData(DataFlavor flavor)throws UnsupportedFlavorException, IOException {if (isDataFlavorSupported(flavor))return image;throw new UnsupportedFlavorException(flavor);}};Toolkit.getDefaultToolkit().getSystemClipboard().setContents(trans,null);75.从剪贴板复制图像到窗体76.删除文件夹下的所有文件且不删除文件夹下的文件夹/*import java.io.*;import java.util.*;*/LinkedList<String> folderList = new LinkedList<String>();folderList.add(%%1);while (folderList.size() > 0) {File file = new File((String)folderList.poll());File[] files = file.listFiles();ArrayList<File> fileList = new ArrayList<File>();for (int i = 0; i < files.length; i++) {if (files[i].isDirectory()) {folderList.add(files[i].getPath());} else {fileList.add(files[i]);}}for (File f : fileList) {f.delete();}}78.Unicode文件转GB2312格式private static boolean isNeedConvert(char para){return ((para&(0x00FF))!=para);}String dataStr=%%1;"\\u9009 \\u5173";int index = 0;StringBuffer buffer = new StringBuffer();while(index<dataStr.length()) {if(!"\\u".equals(dataStr.substring(index,index+2))){buffer.append(dataStr.charAt(index));index++;continue;}String charStr = "";charStr = dataStr.substring(index+2,index+6);char letter = (char) Integer.parseInt(charStr, 16 );buffer.append(letter);index+=6;}String %%2=buffer.toString();79.开源程序库Xercesc-C++代码工程中内联import java.io.*;import java.util.*;import java.util.regex.*;public class InlineXercesc {private final String filter = ".cpp";private ArrayList<String> all = new ArrayList<String>();private LinkedList<String> fal2 = new LinkedList<String>();private static String CurDir = System.getProperty("user.dir");private void doSearch(String path) {File filepath = new File(path);if (filepath.exists() && filepath.isDirectory()) {File[] fileArray = filepath.listFiles();for (File f : fileArray) {if (f.isDirectory()) {doSearch(f.getPath());} else {if (f.getName().indexOf(filter) >= 0) {for (String file : all) {if (file.substring(file.lastIndexOf("\\") + 1).equals(f.getName())) {fal2.add(f.getAbsolutePath());}}}}}}}public InlineXercesc(String lib) throws IOException {String SourceLib = "D:\\Desktop\\大项目\\xerces-c-3.0.1\\src";Pattern pattern = Pattern.compile("include.*?" + lib + ".*?>"); // 第一个参数为需要匹配的字符串Matcher matcher = pattern.matcher("");LinkedList<String> fal = new LinkedList<String>();File delfile = new File(CurDir);File[] files2 = delfile.listFiles();for (int l = 0; l < files2.length; l++) {if (files2[l].isDirectory()) {String enumDir = CurDir + "\\" + files2[l].getName() + "\\";LinkedList<String> folderList = new LinkedList<String>();folderList.add(files2[l].getAbsolutePath());while (folderList.size() > 0) {File file = new File((String)folderList.poll());File[] files = file.listFiles();for (int i = 0; i < files.length; i++) {if (files[i].isDirectory()) {folderList.add(files[i].getPath());} else {String fileStr = files[i].getAbsolutePath(); // 第2个参数开始，均为文件名。BufferedReader br = null;String line;try {br = new BufferedReader(new FileReader(fileStr)); // 打开文件} catch (IOException e) {// 没有打开文件，则产生异常System.err.println("Cannot read '" + fileStr+ "': " + e.getMessage());continue;}StringBuilder sb = new StringBuilder(2048);while ((line = br.readLine()) != null) { // 读入一行，直到文件结束matcher.reset(line); // 匹配字符串if (matcher.find()) { // 如果有匹配的字符串，则输出sb.append(line.replace(line.substring(line.indexOf("<"),line.lastIndexOf("/") + 1),"\"").replace('>', '\"'));line = line.substring(line.indexOf("<") + 1,line.lastIndexOf(">")).replace('/','\\');fal.add(SourceLib + "\\" + line);} else {sb.append(line);}sb.append("\r\n");}br.close(); // 关闭文件FileWriter fw2 = new FileWriter(fileStr);fw2.write(sb.toString());fw2.flush();fw2.close();}}}while (fal.size() > 0) {String file = fal.poll(); // 第2个参数开始，均为文件名。String targetPath = enumDir+ file.substring(file.lastIndexOf("\\") + 1);if (!new File(targetPath).exists()) {BufferedReader br = null;String line;try {br = new BufferedReader(new FileReader(file)); // 打开文件} catch (IOException e) {// 没有打开文件，则产生异常System.err.println("Cannot read '" + file + "': "+ e.getMessage());continue;}FileWriter fw = new FileWriter(targetPath);while ((line = br.readLine()) != null) { // 读入一行，直到文件结束matcher.reset(line); // 匹配字符串if (matcher.find()) { // 如果有匹配的字符串，则输出fal.add(SourceLib+ "\\"+ line.substring(line.indexOf("<") + 1,line.lastIndexOf(">")).replace('/', '\\'));line = line.replace(line.substring(line.indexOf("<"),line.lastIndexOf("/") + 1), "\"");line = line.replace(">", "\"");}fw.write(line + "\r\n");}fw.flush();fw.close();br.close(); // 关闭文件}}LinkedList<String> folderListArr = new LinkedList<String>();folderListArr.add(CurDir);while (folderListArr.size() > 0) {File file = new File(folderListArr.poll());File[] files = file.listFiles();for (int i = 0; i < files.length; i++) {if (files[i].isDirectory()) {folderListArr.add(files[i].getPath());} else {if (files[i].getName().substring(files[i].getName().lastIndexOf('.')).equals(".hpp"))all.add(files[i].getAbsoluteFile().toString().replace(".hpp", ".cpp"));}}}int count = 1;while (count > 0) {doSearch(SourceLib);all.clear();while (fal2.size() > 0) {String file1 = fal2.poll(); // 第2个参数开始，均为文件名。String targetPath = enumDir+ file1.substring(file1.lastIndexOf("\\") + 1);if (!new File(targetPath).exists()) {BufferedReader br = null;String line;try {br = new BufferedReader(new FileReader(file1)); // 打开文件} catch (IOException e) {// 没有打开文件，则产生异常System.err.println("Cannot read '" + file1+ "': " + e.getMessage());continue;}FileWriter fw;try {fw = new FileWriter(targetPath);while ((line = br.readLine()) != null) { // 读入一行，直到文件结束matcher.reset(line); // 匹配字符串if (matcher.find()) { // 如果有匹配的字符串，则输出fal2.add(SourceLib+ "\\"+ line.substring(line.indexOf('<') + 1,line.lastIndexOf('>')).replace('/', '\\'));all.add(fal2.getLast().replace(".hpp",".cpp"));line = line.replace(line.substring(line.indexOf('<'), line.lastIndexOf('/') + 1), "\"");line = line.replace('>', '\"');}fw.write(line + "\r\n");}fw.flush();fw.close();br.close(); // 关闭文件} catch (IOException e) {e.printStackTrace();}}}count = all.size();}}}}public static void main(String[] args) {try {new InlineXercesc("xercesc");// 将数据写入文件try {FileWriter fw = new FileWriter(CurDir + "\\DetailCpp.cmd");fw.write("copy StdAfx.cpp+*.c+*.cpp " + CurDir+ "\\StdAfx.cpp && del *.c && del *.cpp");fw.flush();fw.close();} catch (IOException e) {e.printStackTrace();}} catch (IOException e) {}}}80.提取包含头文件列表import java.io.*;import java.util.regex.*;import java.util.*;public class InlineExt {private String CurDir = System.getProperty("user.dir");public InlineExt() {Pattern pattern = Pattern.compile("include.*?\".*?.hpp\""); // 第一个参数为需要匹配的字符串Matcher matcher = pattern.matcher("");File delfile = new File(CurDir);File[] files2 = delfile.listFiles();for (int l = 0; l < files2.length; l++) {if (files2[l].isDirectory()) {Set<String> ts = new LinkedHashSet<String>();File file = new File(files2[l].getPath(), "StdAfx.cpp");BufferedReader br = null;FileWriter fw = null;String line;try {br = new BufferedReader(new FileReader(file)); // 打开文件while ((line = br.readLine()) != null) {matcher.reset(line); // 匹配字符串if (matcher.find()) { // 如果有匹配的字符串，则输出ts.add(line.substring(line.indexOf('\"') + 1, line.lastIndexOf('\"')));}}Iterator<String> it = ts.iterator();File file2 = new File(files2[l], "ReadMe.txt");if (file2.exists()) {fw = new FileWriter(file2);while (it.hasNext()) {fw.write("#include \"" + it.next() + "\"\r\n");}}} catch (IOException e) {// 没有打开文件，则产生异常System.err.println("Cannot read '" + file + "': "+ e.getMessage());continue;} finally {try {if (br != null)br.close();if (fw != null)fw.close();} catch (IOException e) {e.printStackTrace();}}}}}public static void main(String[] args) {new InlineExt();}}81.GB2312文件转Unicode格式82.Java程序打包/*import java.io.*;import java.util.*;private static String className;private static File myFilePath;*/String path=%%1;ProcessBuilder pb = null;myFilePath = new File(path, "conf.txt");LinkedList<String> folderList = new LinkedList<String>();folderList.add(path);while (folderList.size() > 0) {File file = new File((String)folderList.poll());File[] files = file.listFiles();for (int i = 0; i < files.length; i++) {if (files[i].isDirectory()) {folderList.add(files[i].getPath());} else {if (files[i].getName().substring(2).contains(".")&& files[i].getName().substring(files[i].getName().lastIndexOf('.')).equals(".java")) {try {className = files[i].getName().substring(0,files[i].getName().lastIndexOf('.'));if (!myFilePath.exists())myFilePath.createNewFile();FileWriter resultFile = new FileWriter(myFilePath);PrintWriter myFile = new PrintWriter(resultFile);myFile.println("Main-Class:" + className);myFile.flush();myFile.close();resultFile.close();pb = new ProcessBuilder("javac", files[i].getAbsolutePath()+ " && jar cmf "+ myFilePath.getAbsolutePath()+ " "+ className+ ".jar "+ className+ ".class");pb.start();} catch (IOException e) {e.printStackTrace();}}}}}folderList = new LinkedList<String>();folderList.add(path);while (folderList.size() > 0) {File file = new File((String)folderList.poll());File[] files = file.listFiles();for (int i = 0; i < files.length; i++) {if (files[i].isDirectory()) {folderList.add(files[i].getPath());} else {if (files[i].getName().substring(2).contains(".")&& files[i].getName().substring(files[i].getName().lastIndexOf('.')).equals(".class")) {files[i].delete();}}}}83.UTF-8文件转Unicode格式/*** utf-8 转换成 unicode* @author fanhui* 2007-3-15* @param inStr* @return*/public static String utf8ToUnicode(String inStr) {char[] myBuffer = inStr.toCharArray();StringBuffer sb = new StringBuffer();for (int i = 0; i < inStr.length(); i++) {UnicodeBlock ub = UnicodeBlock.of(myBuffer[i]);if(ub == UnicodeBlock.BASIC_LATIN){//英文及数字等sb.append(myBuffer[i]);}else if(ub == UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS){//全角半角字符int j = (int) myBuffer[i] - 65248;sb.append((char)j);}else{//汉字short s = (short) myBuffer[i];String hexS = Integer.toHexString(s);String unicode = "\\u"+hexS;sb.append(unicode.toLowerCase());}}return sb.toString();}84.创建PDF文档/*http://www.lowagie.com/iText/http://jaist.dl.sourceforge.net/sourceforge/itext/itext-1.4.jarhttp://itextdocs.lowagie.com/downloads/iTextAsian.jarhttp://itextdocs.lowagie.com/downloads/iTextAsianCmaps.jarimport java.io.*;import com.lowagie.text.*;import com.lowagie.text.pdf.PdfWriter;*/Document document = new Document();try{PdfWriter.getInstance(document, new FileOutputStream(%%1)); //"HelloWorld.pdf"// 添加PDF文档的一些信息document.addTitle("Hello World example");document.addAuthor("Bruno Lowagie");document.addSubject("This example explains how to add metadata.");document.addKeywords("iText, Hello World, step 3, metadata");document.addCreator("My program using iText");document.open();// 插入一个段落document.add(new Paragraph("Hello World!"));}catch (DocumentException de){System.err.println(de.getMessage());}catch (IOException ioe){System.err.println(ioe.getMessage());}// 关闭打开的文档document.close();三、中文问题：由于iText不支持东亚语言，我们下载了iTextAsian.jar 以后，就可以在PDF里面写中文：/*** AsianTest.java*/import java.io.*;import com.lowagie.text.*;import com.lowagie.text.pdf.*;import java.awt.*;public class AsianTest{public static void main(String[] args) {// 创建一个Document对象Document document = new Document();try{// 生成名为 AsianTest.pdf 的文档PdfWriter.getInstance(document, new FileOutputStream("AsianTest.pdf"));/** 新建一个字体,iText的方法* STSongStd-Light 是字体，在iTextAsian.jar 中以property为后缀* UniGB-UCS2-H 是编码，在iTextAsian.jar 中以cmap为后缀* H 代表文字版式是 横版， 相应的 V 代表 竖版*/BaseFont bfChinese = BaseFont.createFont("STSongStd-Light", "UniGB-UCS2-H", false);Font fontChinese = new Font(bfChinese, 12, Font.NORMAL, Color.GREEN);// 打开文档，将要写入内容document.open();// 插入一个段落Paragraph par = new Paragraph("我们",fontChinese);document.add(par);}catch (DocumentException de){System.err.println(de.getMessage());}catch (IOException ioe){System.err.println(ioe.getMessage());}// 关闭打开的文档document.close();}}就可以显示中文了。四、其他问题：（应导入相应的包）1. 换页：document.newPage();2. 表格：// 设置 TableTable aTable = new Table(3);int width[] = {25,25,50};aTable.setWidths(width);aTable.setWidth(80); // 占页面宽度 80%aTable.setDefaultHorizontalAlignment(Element.ALIGN_LEFT);aTable.setDefaultVerticalAlignment(Element.ALIGN_MIDDLE);aTable.setAutoFillEmptyCells(true); //自动填满aTable.setPadding(1);aTable.setSpacing(1);aTable.setDefaultCellBorder(0);aTable.setBorder(0);Cell cell = new Cell(new Phrase("这是一个测试的 3*3 Table 数据", fontChinese ));cell.setVerticalAlignment(Element.ALIGN_TOP);cell.setRowspan(3);aTable.addCell(cell);aTable.addCell(new Cell("#1"));aTable.addCell(new Cell("#2"));aTable.addCell(new Cell("#3"));aTable.addCell(new Cell("#4"));aTable.addCell(new Cell("#5"));aTable.addCell(new Cell("#6"));document.add(aTable);3. 图片：// 可以是绝对路径，也可以是URLImage img = Image.getInstance("logo.gif");// Image image = Image.getInstance(new URL(http://xxx.com/logo.jpg));img.setAbsolutePosition(0, 0);document.add(img);五、参考文档：iTexthttp://www.lowagie.com/iText/iText API:http://itext.sourceforge.net/docs/http://www.sentom.net/list.asp?id=4285.创建Word文档/*import java.awt.*;import java.io.*;import com.lowagie.text.*;import com.lowagie.text.pdf.*;import com.lowagie.text.rtf.*;*/public void createDocContext(String file) throws DocumentException,IOException {// 设置纸张大小Document document = new Document(PageSize.A4);// 建立一个书写器(Writer)与document对象关联，通过书写器(Writer)可以将文档写入到磁盘中RtfWriter2.getInstance(document, new FileOutputStream(file));document.open();// 设置中文字体BaseFont bfChinese = BaseFont.createFont("STSongStd-Light","UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);// 标题字体风格Font titleFont = new Font(bfChinese, 12, Font.BOLD);// 正文字体风格Font contextFont = new Font(bfChinese, 10, Font.NORMAL);Paragraph title = new Paragraph("标题");// 设置标题格式对齐方式title.setAlignment(Element.ALIGN_CENTER);title.setFont(titleFont);document.add(title);String contextString = "iText是一个能够快速产生PDF文件的java类库。"+ " \n"// 换行+ "iText的java类对于那些要产生包含文本，"+ "表格，图形的只读文档是很有用的。它的类库尤其与java Servlet有很好的给合。"+ "使用iText与PDF能够使你正确的控制Servlet的输出。";Paragraph context = new Paragraph(contextString);// 正文格式左对齐context.setAlignment(Element.ALIGN_LEFT);context.setFont(contextFont);// 离上一段落（标题）空的行数context.setSpacingBefore(5);// 设置第一行空的列数context.setFirstLineIndent(20);document.add(context);//利用类FontFactory结合Font和Color可以设置各种各样字体样式/*** Font.UNDERLINE 下划线，Font.BOLD 粗体*/Paragraph underline = new Paragraph("下划线的实现", FontFactory.getFont(FontFactory.HELVETICA_BOLDOBLIQUE, 18, Font.UNDERLINE,new Color(0, 0, 255)));document.add(underline);// 设置 Table 表格Table aTable = new Table(3);int width[] = {25,25,50};aTable.setWidths(width);//设置每列所占比例aTable.setWidth(90); // 占页面宽度 90%aTable.setAlignment(Element.ALIGN_CENTER);//居中显示aTable.setAlignment(Element.ALIGN_MIDDLE);//纵向居中显示aTable.setAutoFillEmptyCells(true); //自动填满aTable.setBorderWidth(1); //边框宽度aTable.setBorderColor(new Color(0, 125, 255)); //边框颜色aTable.setPadding(2);//衬距，看效果就知道什么意思了aTable.setSpacing(3);//即单元格之间的间距aTable.setBorder(2);//边框//设置表头/*** cell.setHeader(true);是将该单元格作为表头信息显示；* cell.setColspan(3);指定了该单元格占3列；* 为表格添加表头信息时，要注意的是一旦表头信息添加完了之后，* 必须调用 endHeaders()方法，否则当表格跨页后，表头信息不会再显示*/Cell haderCell = new Cell("表格表头");haderCell.setHeader(true);haderCell.setColspan(3);aTable.addCell(haderCell);aTable.endHeaders();Font fontChinese = new Font(bfChinese, 12, Font.NORMAL, Color.GREEN);Cell cell = new Cell(new Phrase("这是一个测试的 3*3 Table 数据", fontChinese ));cell.setVerticalAlignment(Element.ALIGN_TOP);cell.setBorderColor(new Color(255, 0, 0));cell.setRowspan(2);aTable.addCell(cell);aTable.addCell(new Cell("#1"));aTable.addCell(new Cell("#2"));aTable.addCell(new Cell("#3"));aTable.addCell(new Cell("#4"));Cell cell3 = new Cell(new Phrase("一行三列数据", fontChinese ));cell3.setColspan(3);cell3.setVerticalAlignment(Element.ALIGN_CENTER);aTable.addCell(cell3);document.add(aTable);document.add(new Paragraph("\n"));//添加图片Image img=Image.getInstance("d:\\img01800.jpg");img.setAbsolutePosition(0, 0);img.setAlignment(Image.RIGHT);//设置图片显示位置img.scaleAbsolute(12,35);//直接设定显示尺寸img.scalePercent(50);//表示显示的大小为原尺寸的50%img.scalePercent(25, 12);//图像高宽的显示比例img.setRotation(30);//图像旋转一定角度document.add(img);document.close();}/*** @param args*/public static void main(String[] args) {CreateWordDemo word = new CreateWordDemo();String file = "c:/demo1.doc";try {word.createDocContext(file);} catch (DocumentException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}/* 内部线程类 */class Son extends Thread{private ICallBack event;public Son(ICallBack callback){event=callback;}public void run(){try{java.text.SimpleDateFormat fmt=new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");while(true){Thread.currentThread().sleep(3000);event.output(fmt.format(new java.util.Date()));Thread.currentThread().sleep(3000);}}catch (Exception e){}}}/* 回调接口 */interface ICallBack{public void output();}86.快速高效的文件加密/*import java.util.*;import java.io.*;import javax.swing.*;*/private static final String CharSet = "0123456789ABCDEF";private static final int a[] = { 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 };private static final int b[] = { 3, 3, 3, 5, 5, 3, 3, 3, 5, 3, 5, 3, 7, 3,11, 7, 11, 3, 5, 3, 3, 3, 7, 5, 5, 3, 7, 3, 11, 13, 3 };private static final int c[] = { 3, 5, 7, 5, 7, 11, 13, 19, 17, 29, 19, 31,17, 41, 11, 19, 13, 47, 29, 53, 59, 67, 29, 41, 43, 71, 31, 73, 23,23, 101 };private static final int d[] = { 5, 7, 11, 13, 17, 17, 19, 29, 43, 43, 47,47, 59, 61, 61, 67, 71, 71, 73, 79, 89, 101, 101, 103, 107, 107,109, 109, 127, 149, 151 };private static int ka, kb, kc, kd;private static void init() {Date t1 = new Date();Date t2 = new Date(79, 8, 23, 8, 30, 0); // "9-23-1979 8:30"int GetDays = 0;int result = 0;Calendar start = new GregorianCalendar();Calendar end = new GregorianCalendar();start.setTime(t2);end.setTime(t1);Calendar startCalendar = start;int startYear = start.get(Calendar.YEAR);int startMonth = start.get(Calendar.MONTH);int startDayOfM = start.get(Calendar.DAY_OF_MONTH);int startDayOfY = start.get(Calendar.DAY_OF_YEAR);Calendar endCalendar = end;int endYear = end.get(Calendar.YEAR);int endMonth = end.get(Calendar.MONTH);int endDayOfM = end.get(Calendar.DAY_OF_MONTH);int endDayOfY = end.get(Calendar.DAY_OF_YEAR);int startLastYear = 0, startLastDayOfY = 0;if (endYear == startYear) {startLastYear = endDayOfY < startDayOfY ? startYear : endYear;startLastDayOfY = endDayOfY < startDayOfY ? startDayOfY : endDayOfY;} else if (endYear < startYear) {startLastYear = startYear;startLastDayOfY = startDayOfY;} else {startLastYear = endYear;startLastDayOfY = endDayOfY;}if ((endYear == startYear && endDayOfY == startDayOfY)|| (startLastYear == startYear && startLastDayOfY == startDayOfY)) {GetDays = result;} else if (startYear == endYear) {GetDays = endDayOfY - startDayOfY;} else {Calendar tmp = Calendar.getInstance();result = startCalendar.getActualMaximum(Calendar.DAY_OF_YEAR)- startDayOfY;for (int i = startYear + 1; i < endYear; i++) {tmp.set(i, tmp.get(Calendar.MONTH), tmp.get(Calendar.DAY_OF_MONTH));result += tmp.getActualMaximum(Calendar.DAY_OF_YEAR);}result += end.get(Calendar.DAY_OF_YEAR);GetDays = result;}Random rand = new Random(GetDays * 8 - 55);int r = rand.nextInt(GetDaysInMoths(t2.getMonth() + 1));r=0;ka = a[r];kb = b[r];kc = c[r];kd = d[r];}private static int GetDaysInMoths(int nMoths) {switch (nMoths) {case 2: {int nYear = new Date().getYear() + 1900;if ((nYear % 4 == 0) && (nYear % 400) != 0) {return 29;} else {return 28;}}case 1:case 3:case 5:case 7:case 8:case 10:case 12:return 31;case 4:case 6:case 9:case 11:return 30;default:return -1;}}private static int niyuan(int m, int n) {int a, b, c, d, t, yu = 0, shang, mod;a = m;b = n;mod = a;c = 0;d = 1;while (b < 0)b += a;if (a % b == 0 || b % 2 == 0)return 0;while (b != 1) {t = a % b;shang = a / b;a = b;b = t;yu = c - shang * d;c = d;d = yu;}if (yu < 0)yu += mod;return yu;}JFileChooser chooser = new JFileChooser();chooser.setCurrentDirectory(new File("E:"));chooser.addChoosableFileFilter(new javax.swing.filechooser.FileFilter() {public boolean accept(File f) {return f.getName().toLowerCase().endsWith(".zip")|| f.isDirectory();}public String getDescription() {return "Compress Files(*.zip)";}});chooser.addChoosableFileFilter(new javax.swing.filechooser.FileFilter() {public boolean accept(File f) {return f.getName().toLowerCase().endsWith(".txt")|| f.isDirectory();}public String getDescription() {return "Text Files(*.txt)";}});chooser.addChoosableFileFilter(new javax.swing.filechooser.FileFilter() {public boolean accept(File f) {return f.getName().toLowerCase().endsWith(".exe")|| f.isDirectory();}public String getDescription() {return "Executeable Files(*.exe)";}});if (chooser.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {String name = chooser.getSelectedFile().getPath();JFileChooser chooser2 = new JFileChooser();chooser2.setCurrentDirectory(new File("E:"));if (name.substring(name.lastIndexOf('.')).equals(".txt")) {char[] sRead = new char[10240];char[] hexstr = new char[10240];char[] pbuf = new char[20480];char[] rRead = new char[20480];char[] out2 = new char[10240];chooser2.addChoosableFileFilter(new javax.swing.filechooser.FileFilter() {public boolean accept(File f) {return f.getName().toLowerCase().endsWith(".zip")|| f.isDirectory();}public String getDescription() {return "Compress Files(*.zip)";}});chooser2.addChoosableFileFilter(new javax.swing.filechooser.FileFilter() {public boolean accept(File f) {return f.getName().toLowerCase().endsWith(".exe")|| f.isDirectory();}public String getDescription() {return "Executeable Files(*.exe)";}});if (chooser2.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {init();FileOutputStream fw = null;try {FileInputStream fis = new FileInputStream(chooser.getSelectedFile());fw = new FileOutputStream(chooser2.getSelectedFile());byte[] buffer = new byte[20480];int js = 0, tmp;int aany, ddny;int r00 = ka * kc * kd;int r01 = -ka * kb * kc;int r10 = -kb * kc * kc;int r11 = ka * kb * kc;int x00 = ka * ka * kc * kd - ka * kb * kc * kc;int x11 = ka * kb * kc * kd - kb * kb * kc * kc;while (x00 % 2 == 0) {x00 /= 2;r00 /= 2;r01 /= 2;}while (x11 % 2 == 0) {x11 /= 2;r10 /= 2;r11 /= 2;}aany = x00;ddny = x11;if (niyuan(1024, aany) != 0 && niyuan(1024, ddny) != 0) {int kn00 = r00 * niyuan(1024, x00);int kn01 = r01 * niyuan(1024, x00);int kn10 = r10 * niyuan(1024, x11);int kn11 = r11 * niyuan(1024, x11);ka = kn00;kb = kn01;kc = kn10;kd = kn11;} else {JOptionPane.showMessageDialog(null, "无逆矩阵！");System.exit(0);}while (ka < 0)ka += 1024;while (kb < 0)kb += 1024;while (kc < 0)kc += 1024;while (kd < 0)kd += 1024;ka %= 1024;kb %= 1024;kc %= 1024;kd %= 1024;try {int byteread;while ((byteread = fis.read(buffer)) != -1) {int nLen = byteread / 2;byte[] sming = new byte[nLen];String chs = new String(buffer, "US-ASCII");for (int i = 0; i < nLen; i++) {byte bTmp;if (byteread < 2)bTmp = -1;bTmp = (byte) (CharSet.indexOf(chs.substring(i * 2, i * 2 + 1)) * 16 + CharSet.indexOf(chs.substring(i * 2 + 1,i * 2 + 2)));sming[i] = bTmp;}if (nLen % 2 != 0)js = 1;for (int i = 0; i < nLen - 1; i += 2) {char c1 = (char) sming[i];char c2 = (char) sming[i + 1];tmp = ka * c1 + kc * c2;while (tmp < 0)tmp += 1024;char s1 = (char) (tmp % 1024);fw.write(s1);tmp = kb * c1 + kd * c2;while (tmp < 0)tmp += 1024;char s2 = (char) (tmp % 1024);fw.write(s2);}if (js == 1) {char c3 = (char) ((sming[nLen - 1] - 4) % 1024);fw.write(c3);}}fw.flush();} catch (IOException e) {e.printStackTrace();} finally {try {fis.close();fw.close();} catch (IOException e) {e.printStackTrace();}}} catch (FileNotFoundException e1) {e1.printStackTrace();}if(!chooser2.getFileFilter().accept(chooser2.getSelectedFile())){if(chooser2.getFileFilter().getDescription().equals("Compress Files(*.zip)"))chooser2.getSelectedFile().renameTo(new File(chooser2.getSelectedFile().getAbsolutePath()+".zip"));else if(chooser2.getFileFilter().getDescription().equals("Executeable Files(*.exe)"))chooser2.getSelectedFile().renameTo(new File(chooser2.getSelectedFile().getAbsolutePath()+".exe"));}}} else {chooser2.setFileFilter(new javax.swing.filechooser.FileFilter() {public boolean accept(File f) {return f.getName().toLowerCase().endsWith(".txt")|| f.isDirectory();}public String getDescription() {return "Text Files";}});if (chooser2.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {if (chooser2.getSelectedFile() != null) {init();File oldfile = chooser.getSelectedFile();FileInputStream inStream = null;FileWriter fw = null;try {if (oldfile.exists()) {inStream = new FileInputStream(oldfile);fw = new FileWriter(chooser2.getSelectedFile());byte[] sRead = new byte[10240];int byteread;while ((byteread = inStream.read(sRead)) != -1) {StringBuilder smi = new StringBuilder(byteread * 2);int js = 0;if (byteread % 2 != 0)js = 1;for (int i = 0; i < byteread - 1; i += 2) {char c1 = (char) sRead[i];char c2 = (char) sRead[i + 1];int tmp = ka * c1 + kc * c2;while (tmp < 0)tmp += 1024;byte s1 = (byte) (tmp % 1024);int js1 = (int) s1 >> 4 & 0xf;smi.append(CharSet.substring(js1,js1 + 1));int ks1 = s1 & 0xf;smi.append(CharSet.substring(ks1,ks1 + 1));tmp = kb * c1 + kd * c2;while (tmp < 0)tmp += 1024;byte s2 = (byte) (tmp % 1024);int js2 = (int) s2 >> 4 & 0xf;smi.append(CharSet.substring(js2,js2 + 1));int ks2 = s2 & 0xf;smi.append(CharSet.substring(ks2,ks2 + 1));}if (js == 1) {byte s3 = (byte) ((sRead[byteread - 1] - 4) % 1024);int js3 = (int) s3 >> 4 & 0xf;smi.append(CharSet.substring(js3,js3 + 1));int ks3 = (int) s3 & 0xf;smi.append(CharSet.substring(ks3,ks3 + 1));}fw.write(smi.toString());}fw.flush();}} catch (IOException e) {e.printStackTrace();} finally {try {fw.close();inStream.close();} catch (IOException e) {e.printStackTrace();}}if(!chooser2.getFileFilter().accept(chooser2.getSelectedFile()))chooser2.getSelectedFile().renameTo(new File(chooser2.getSelectedFile().getAbsolutePath()+".txt"));}}}}87.菜单勾选/取消开机自启动程序88.菜单勾选/取消自动登录系统89.模拟键盘输入字符串/*import java.awt.*;import java.awt.event.*;throws Exception{*/static Robot robot;static{try {robot = new Robot();} catch (AWTException e) {}}static void sendKey(String ks){KeyStore k = KeyStore.findKeyStore(ks);if(k!=null){if(k.upCase)upCase(k.v);elsesendKey(k.v);}else{for(int i=0; i<ks.length(); i++){char c = ks.charAt(i);if(c>='0'&&c<='9'){sendKey(c);}else if(c>='a'&&c<='z'){sendKey(c-32);}else if(c>='A'&&c<='Z'){upCase(c);}}}}private static void upCase(int kc){robot.keyPress(KeyEvent.VK_SHIFT);robot.keyPress(kc);robot.keyRelease(kc);robot.keyRelease(KeyEvent.VK_SHIFT);}private static void sendKey(int kc){robot.keyPress(kc);robot.keyRelease(kc);}static class KeyStore{//special keysfinal static KeyStore[] sp = {new KeyStore("{Tab}",KeyEvent.VK_TAB),//tabnew KeyStore("{Enter}",KeyEvent.VK_ENTER),//enternew KeyStore("{PUp}",KeyEvent.VK_PAGE_UP),//page upnew KeyStore("{<}",KeyEvent.VK_LESS),//<new KeyStore("{Up}",KeyEvent.VK_UP),//up keynew KeyStore("{At}",KeyEvent.VK_AT,true),//@new KeyStore("{Dollar}",KeyEvent.VK_DOLLAR,true),//$};String k;int v;boolean upCase;KeyStore(String k,int v){this(k,v,false);}KeyStore(String s,int i,boolean up){k=s;v=i;upCase=up;}static KeyStore findKeyStore(String k){for(int i=0; i<sp.length; i++){if(sp[i].k.equals(k))return sp[i];}return null;}}Thread.sleep(1000);sendKey("{Tab}");//tabsendKey("{<}");//<sendKey("abcd123AHahahAA");//abcd123AHahahAAsendKey("{At}");//@sendKey("{Dollar}");//$sendKey("{Up}");//up arrow90.提取PDF文件中的文本//http://incubator.apache.org/pdfbox//*import java.io.*;import org.pdfbox.pdfparser.*;import org.pdfbox.pdmodel.*;import org.pdfbox.util.*;*/public class SimplePDFReader {/*** simply reader all the text from a pdf file.* You have to deal with the format of the output text by yourself.* 2008-2-25* @param pdfFilePath file path* @return all text in the pdf file*/public static String getTextFromPDF(String pdfFilePath) {String result = null;FileInputStream is = null;PDDocument document = null;try {is = new FileInputStream(pdfFilePath);PDFParser parser = new PDFParser(is);parser.parse();document = parser.getPDDocument();PDFTextStripper stripper = new PDFTextStripper();result = stripper.getText(document);} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} finally {if (is != null) {try {is.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}if (document != null) {try {document.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}return result;}}得到PDF的文本内容之后，自己根据文件的格式，取得想要的文本（这里我找的就是文章的标题，在文本中恰巧都是文件的第一行的内容），然后通过java的File相关api，对文件进行更名操作。import java.io.File;import java.io.FilenameFilter;public class PaperNameMender {public static void changePaperName(String filePath) {//使用SimplePDFReader得到pdf文本String ts = SimplePDFReader.getTextFromPDF(filePath);//取得一行内容String result = ts.substring(0, ts.indexOf('\n'));//得到源文件名中的最后一个逗点.的位置int index = filePath.indexOf('.');int nextIndex = filePath.indexOf('.', index + 1);while(nextIndex != -1) {index = nextIndex;nextIndex = filePath.indexOf('.', index + 1);}//合成新文件名String newFilename = filePath.substring(0, index) + " " +result.trim() + ".pdf";File originalFile = new File(filePath);//修改文件名originalFile.renameTo(new File(newFilename));}}91.操作内存映射文件/*import java.io.*;import java.nio.*;import java.nio.channels.*;*/private static int length = 0x8FFFFFF; // 128 MbMappedByteBuffer out =new RandomAccessFile("test.dat", "rw").getChannel().map(FileChannel.MapMode.READ_WRITE, 0, length);for(int i = 0; i < length; i++)out.put((byte)'x');for(int i = length/2; i < length/2 + 6; i++)//(char)out.get(i);92.重定向windows控制台程序的输出信息92.1 取得Runtime.getRuntime().exec("cmd /c dir")的输入输出//import java.io.*;try {String command = "cmd /c dir";Process proc = Runtime.getRuntime().exec(command);InputStreamReader ir = new InputStreamReader(proc.getInputStream());LineNumberReader lnr = new LineNumberReader(ir);String line;while( (line = lnr.readLine()) != null){//line}} catch (IOException e) {e.printStackTrace();}92.2 利用ProcessBuilder来创建Process对象，执行外部可执行程序// //Eg1:// String address = null;//// String os = System.getProperty("os.name");// System.out.println(os);//// if (os != null) {// if (os.startsWith("Windows")) {// try {// ProcessBuilder pb = new ProcessBuilder("ipconfig", "/all");// Process p = pb.start();//// BufferedReader br = new BufferedReader(// new InputStreamReader(p.getInputStream()));//// String line;// while ((line = br.readLine()) != null) {// if (line.indexOf("Physical Address") != -1) {// int index = line.indexOf(":");// address = line.substring(index + 1);// break;// }// }// br.close();// address = address.trim();// } catch (IOException e) {// // TODO Auto-generated catch block// e.printStackTrace();// }// } else if (os.startsWith("Linux")) {// try {// ProcessBuilder pb = new ProcessBuilder(//// "ifconfig", "/all");//// Process p = pb.start();// BufferedReader br = new BufferedReader(// new InputStreamReader(p.getInputStream()));// String line;// while ((line = br.readLine()) != null) {// int index = line.indexOf("硬件地址");// if (index != -1) {// address = line.substring(index + 4);// break;// }// }// br.close();// address = address.trim();// } catch (IOException e) {// e.printStackTrace();// }// }// }// //Eg2:// try {// Process proc;// proc = Runtime.getRuntime().exec("cmd.exe");// BufferedReader read = new BufferedReader(new InputStreamReader(proc// .getInputStream()));// new Thread(new Echo(read)).start();//// PrintWriter out = new PrintWriter(new OutputStreamWriter(proc// .getOutputStream()));// BufferedReader in = new BufferedReader(new InputStreamReader(// System.in));// String instr = in.readLine();// while (!"exit".equals(instr)) {// instr = in.readLine();// out.println(instr);// out.flush();// }//// in.readLine();// read.close();// out.close();// } catch (IOException e) {// // TODO Auto-generated catch block// e.printStackTrace();// }}}class Echo implements Runnable {private BufferedReader read;public Echo(BufferedReader read) {read = read;}public void run() {try {String line = read.readLine();while (line != null) {//lineline = read.readLine();}} catch (IOException ex) {ex.printStackTrace();}}}93.序列化//import java.io.*;class tree implements Serializable{public tree left;public tree right;public int id;public int level;private static int count = 0 ;public tree( int depth) {id = count ++ ;level = depth;if (depth > 0 ) {left = new tree(depth - 1 );right = new tree(depth - 1 );}}public void print( int levels) {for ( int i = 0 ; i < level; i ++ )System.out.print( " " );System.out.println( " node " + id);if (level <= levels && left != null )left.print(levels);if (level <= levels && right != null )right.print(levels);}}try {/**/ /* 创建一个文件写入序列化树。 */FileOutputStream ostream = new FileOutputStream(%%1);/**/ /* 创建输出流 */ObjectOutputStream p = new ObjectOutputStream(ostream);/**/ /* 创建一个二层的树。 */tree base = new tree( 2 );p.writeObject(base); // 将树写入流中。p.writeObject( " LiLy is 惠止南国 " );p.flush();ostream.close(); // 关闭文件。} catch (Exception ex) {ex.printStackTrace();}}94.反序列化//import java.io.*;class tree implements Serializable{public tree left;public tree right;public int id;public int level;private static int count = 0 ;public tree( int depth) {id = count ++ ;level = depth;if (depth > 0 ) {left = new tree(depth - 1 );right = new tree(depth - 1 );}}public void print( int levels) {for ( int i = 0 ; i < level; i ++ )System.out.print( " " );System.out.println( " node " + id);if (level <= levels && left != null )left.print(levels);if (level <= levels && right != null )right.print(levels);}}try {FileInputStream istream = new FileInputStream(%%1);ObjectInputStream q = new ObjectInputStream(istream);/**/ /* 读取树对象，以及所有子树 */tree new_tree = (tree)q.readObject();new_tree.print( 2 ); // 打印出树形结构的最上面 ２级String name = (String)q.readObject();System.out.println( " \n " + name);} catch (Exception ex) {ex.printStackTrace();}}95.报表相关//http://www.jfree.org/jfreechart//*import java.io.*;import java.awt.*;import org.jfree.chart.*;import org.jfree.chart.title.TextTitle;import org.jfree.data.general.*;*/String title = "梦泽科技员工学历情况统计";DefaultPieDataset piedata = new DefaultPieDataset();piedata.setValue("大专", 8.1);piedata.setValue("大学", 27.6);piedata.setValue("硕士", 53.2);piedata.setValue("博士及以上", 19.2);piedata.setValue("大专以下", 1.9);JFreeChart chart = ChartFactory.createPieChart(title, piedata, true, true, true);chart.setTitle(new TextTitle(title, new Font("宋体", Font.BOLD, 25)));chart.addSubtitle(new TextTitle("最后更新日期：2005年5月19日", new Font("楷书", Font.ITALIC, 18)));chart.setBackgroundPaint(Color.white);try {ChartUtilities.saveChartAsJPEG(new File("PieChart.jpg"), chart, 360, 300);} catch (IOException exz) {System.err.print("....Cant′t Create image File");}96.全屏幕截取/*import java.awt.*;import java.awt.image.*;import java.io.*;import javax.imageio.*;*/try{Dimension d = Toolkit.getDefaultToolkit().getScreenSize();BufferedImage screenshot = (new Robot()).createScreenCapture(new Rectangle(0, 0,(int) d.getWidth(), (int) d.getHeight()));// 根据文件前缀变量和文件格式变量，自动生成文件名String name = %%1 + "."+ %%2; //"png"File f = new File(name);ImageIO.write(screenshot, %%2, f);} catch (Exception ex) {ex.printStackTrace();}97.区域截屏/*import java.awt.*;import java.awt.image.*;import java.io.*;import java.util.*;import javax.imageio.*;*/interface ImageType {public final static String JPG = "JPG";public final static String PNG = "PNG";public final static String GIF = "GIF";}public class ScreenDumpHelper {/** ScreenDumpHelper 静态对象 */private static ScreenDumpHelper defaultScreenDumpHelper;public static ScreenDumpHelper getDefaultScreenDumpHelper() {if (defaultScreenDumpHelper == null)return new ScreenDumpHelper();return defaultScreenDumpHelper;}public ScreenDumpHelper() {Dimension dime = Toolkit.getDefaultToolkit().getScreenSize();setScreenArea(new Rectangle(dime));}private Rectangle screenArea;public Rectangle getScreenArea() {return screenArea;}public void setScreenArea(Rectangle screenArea) {screenArea = screenArea;}public void setScreenArea(int x, int y, int width, int height) {screenArea = new Rectangle(x, y, width, height);}private BufferedImage getBufferedImage() throws AWTException {BufferedImage imgBuf = null;;imgBuf = (new Robot()).createScreenCapture(getScreenArea());return imgBuf;}/*** 将 图像数据写到 输出流中去,方便再处理** @param fileFormat* @param output* @return*/public boolean saveToOutputStream(String fileFormat, OutputStream output) {try {ImageIO.write(getBufferedImage(), fileFormat, output);} catch (AWTException e) {return false;// e.printStackTrace();} catch (IOException e) {return false;// e.printStackTrace();}return true;}/*** 根据文件格式 返回随机文件名称** @param fileFormat* @return*/public String getRandomFileName(String fileFormat) {return "screenDump_" + (new Date()).getTime() + "." + fileFormat;}/*** 抓取 指定区域的截图 到指定格式的文件中 -- 这个函数是核心,所有的都是围绕它来展开的 * 图片的编码并不是以后缀名来判断: 比如s.jpg* 如果其采用png编码,那么这个图片就是png格式的** @param fileName* @param fileFormat* @return boolean*/public boolean saveToFile(String fileName, String fileFormat) {if (fileName == null)fileName = getRandomFileName(fileFormat);try {FileOutputStream fos = new FileOutputStream(fileName);saveToOutputStream(fileFormat, fos);} catch (FileNotFoundException e) {System.err.println("非常规文件或不能创建抑或覆盖此文件: " + fileName);}return true;}/*** 抓取 指定 Rectangle 区域的截图 到指定格式的文件中** @param fileName* @param fileFormat* @param screenArea* @return*/public boolean saveToFile(String fileName, String fileFormat,Rectangle screenArea) {setScreenArea(screenArea);return saveToFile(fileName, fileFormat);}/*** 抓取 指定区域的截图 到指定格式的文件中** @param fileName* @param fileFormat* @param x* @param y* @param width* @param height*/public boolean saveToFile(String fileName, String fileFormat, int x, int y,int width, int height) {setScreenArea(x, y, width, height);return saveToFile(fileName, fileFormat);}/*** 将截图使用 JPG 编码** @param fileName*/public void saveToJPG(String fileName) {saveToFile(fileName, ImageType.JPG);}public void saveToJPG(String fileName, Rectangle screenArea) {saveToFile(fileName, ImageType.JPG, screenArea);}public void saveToJPG(String fileName, int x, int y, int width, int height) {saveToFile(fileName, ImageType.JPG, x, y, width, height);}/*** 将截图使用 PNG 编码** @param fileName*/public void saveToPNG(String fileName) {saveToFile(fileName, ImageType.PNG);}public void saveToPNG(String fileName, Rectangle screenArea) {saveToFile(fileName, ImageType.PNG, screenArea);}public void saveToPNG(String fileName, int x, int y, int width, int height) {saveToFile(fileName, ImageType.PNG, x, y, width, height);}public void saveToGIF(String fileName) {throw new UnsupportedOperationException("不支持保存到GIF文件");// saveToFile(fileName, ImageType.GIF);}/*** @param args*/public static void main(String[] args) {for (int i = 0; i < 5; i++)ScreenDumpHelper.getDefaultScreenDumpHelper().saveToJPG(null,i * 150, i * 150, 400, 300);}}98.计算文件MD5值/*import java.io.*;import java.math.*;import java.security.*;import java.util.*;*/File file=new File(%%1);if (!file.isFile()){return null;}MessageDigest digest = null;FileInputStream in=null;byte buffer[] = new byte[1024];int len;try {digest = MessageDigest.getInstance("MD5");in = new FileInputStream(file);while ((len = in.read(buffer, 0, 1024)) != -1) {digest.update(buffer, 0, len);}in.close();} catch (Exception e) {e.printStackTrace();return null;}BigInteger bigInt = new BigInteger(1, digest.digest());return bigInt.toString(16);}99.计算获取文件夹中文件的MD5值/*import java.io.*;import java.math.*;import java.security.*;import java.util.*;*/public static String getFileMD5(File file) {if (!file.isFile()){return null;}MessageDigest digest = null;FileInputStream in=null;byte buffer[] = new byte[1024];int len;try {digest = MessageDigest.getInstance("MD5");in = new FileInputStream(file);while ((len = in.read(buffer, 0, 1024)) != -1) {digest.update(buffer, 0, len);}in.close();} catch (Exception e) {e.printStackTrace();return null;}BigInteger bigInt = new BigInteger(1, digest.digest());return bigInt.toString(16);}/*** 获取文件夹中文件的MD5值* @param file* @param listChild ;true递归子目录中的文件* @return*/public static Map<String, String> getDirMD5(File file,boolean listChild) {if(!file.isDirectory()){return null;}//<filepath,md5>Map<String, String> map=new HashMap<String, String>();String md5;File files[]=file.listFiles();for(int i=0;i<files.length;i++){File f=files[i];if(f.isDirectory()&&listChild){map.putAll(getDirMD5(f, listChild));} else {md5=getFileMD5(f);if(md5!=null){map.put(f.getPath(), md5);}}}return map;}getDirMD5(%%1,%%2);100.复制一个目录下所有文件到一个文件夹中/*import java.io.*;import java.util.*;*/LinkedList<String> folderList = new LinkedList<String>();folderList.add(%%1);LinkedList<String> folderList2 = new LinkedList<String>();folderList2.add(%%2+ %%1.substring(%%1.lastIndexOf("\\")));while (folderList.size() > 0) {File folders = new File(folderList.peek());String[] file = folders.list();File temp = null;try {for (int i = 0; i < file.length; i++) {if (folderList.peek().endsWith(File.separator)) {temp = new File(folderList.peek() + File.separator+ file[i]);} else {temp = new File(folderList.peek() + File.separator+ file[i]);}if (temp.isFile()) {FileInputStream input = new FileInputStream(temp);FileOutputStream output = new FileOutputStream(new File(%%2,temp.getName()));byte[] b = new byte[10240];int len;while ((len = input.read(b)) != -1) {output.write(b, 0, len);}output.flush();output.close();input.close();}if (temp.isDirectory()) {// 如果是子文件夹for (File f : temp.listFiles()) {if (f.isDirectory()) {folderList.add(f.getPath());folderList2.add(folderList2.peek()+ File.separator + f.getName());}}}}} catch (IOException e) {System.err.println("复制整个文件夹内容操作出错");}folderList.removeFirst();folderList2.removeFirst();}101.移动一个目录下所有文件到一个文件夹中/*import java.io.*;import java.util.*;*/LinkedList<String> folderList = new LinkedList<String>();folderList.add(%%1);LinkedList<String> folderList2 = new LinkedList<String>();folderList2.add(%%2 + %%1.substring(%%1.lastIndexOf("\\")));while (folderList.size() > 0) {File folders = new File(folderList.peek());String[] file = folders.list();File temp = null;try {for (int i = 0; i < file.length; i++) {if (folderList.peek().endsWith(File.separator)) {temp = new File(folderList.peek() + File.separator+ file[i]);} else {temp = new File(folderList.peek() + File.separator+ file[i]);}if (temp.isFile()) {FileInputStream input = new FileInputStream(temp);FileOutputStream output = new FileOutputStream(new File(%%2,temp.getName()));byte[] b = new byte[10240];int len;while ((len = input.read(b)) != -1) {output.write(b, 0, len);}output.flush();output.close();input.close();if (!temp.delete())//删除单个文件操作出错}if (temp.isDirectory()) {// 如果是子文件夹for (File f : temp.listFiles()) {if (f.isDirectory()) {folderList.add(f.getPath());folderList2.add(folderList2.peek()+ File.separator + f.getName());}}}}} catch (Exception e) {//复制整个文件夹内容操作出错e.printStackTrace();}folderList.removeFirst();folderList2.removeFirst();}File f = new File(%%1);if (!f.delete()) {for (File file : f.listFiles()) {if (file.list().length == 0) {file.delete();}}}102.文件RSA高级加密/*import javax.crypto.*;import java.security.*;import java.security.spec.*;import java.security.interfaces.*;import java.io.*;import java.math.BigInteger;*//*** 生成密钥对* @return KeyPair* @throws EncryptException*/public static KeyPair generateKeyPair() throws EncryptException {try {KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA",new org.bouncycastle.jce.provider.BouncyCastleProvider());final int KEY_SIZE = 1024;//没什么好说的了，这个值关系到块加密的大小，可以更改，但是不要太大，否则效率会低keyPairGen.initialize(KEY_SIZE, new SecureRandom());KeyPair keyPair = keyPairGen.genKeyPair();return keyPair;} catch (Exception e) {throw new EncryptException(e.getMessage());}}/*** 生成公钥* @param modulus* @param publicExponent* @return RSAPublicKey* @throws EncryptException*/public static RSAPublicKey generateRSAPublicKey(byte[] modulus, byte[] publicExponent) throws EncryptException {KeyFactory keyFac = null;try {keyFac = KeyFactory.getInstance("RSA", new org.bouncycastle.jce.provider.BouncyCastleProvider());} catch (NoSuchAlgorithmException ex) {throw new EncryptException(ex.getMessage());}RSAPublicKeySpec pubKeySpec = new RSAPublicKeySpec(new BigInteger(modulus), new BigInteger(publicExponent));try {return (RSAPublicKey) keyFac.generatePublic(pubKeySpec);} catch (InvalidKeySpecException ex) {throw new EncryptException(ex.getMessage());}}/*** 生成私钥* @param modulus* @param privateExponent* @return RSAPrivateKey* @throws EncryptException*/public static RSAPrivateKey generateRSAPrivateKey(byte[] modulus, byte[] privateExponent) throws EncryptException {KeyFactory keyFac = null;try {keyFac = KeyFactory.getInstance("RSA", new org.bouncycastle.jce.provider.BouncyCastleProvider());} catch (NoSuchAlgorithmException ex) {throw new EncryptException(ex.getMessage());}RSAPrivateKeySpec priKeySpec = new RSAPrivateKeySpec(new BigInteger(modulus), new BigInteger(privateExponent));try {return (RSAPrivateKey) keyFac.generatePrivate(priKeySpec);} catch (InvalidKeySpecException ex) {throw new EncryptException(ex.getMessage());}}/*** 加密* @param key 加密的密钥* @param data 待加密的明文数据* @return 加密后的数据* @throws EncryptException*/public static byte[] encrypt(Key key, byte[] data) throws EncryptException {try {Cipher cipher = Cipher.getInstance("RSA", new org.bouncycastle.jce.provider.BouncyCastleProvider());cipher.init(Cipher.ENCRYPT_MODE, key);int blockSize = cipher.getBlockSize();//获得加密块大小，如：加密前数据为128个byte，而key_size=1024 加密块大小为127 byte,加密后为128个byte;因此共有2个加密块，第一个127 byte第二个为1个byteint outputSize = cipher.getOutputSize(data.length);//获得加密块加密后块大小int leavedSize = data.length % blockSize;int blocksSize = leavedSize != 0 ? data.length / blockSize + 1 : data.length / blockSize;byte[] raw = new byte[outputSize * blocksSize];int i = 0;while (data.length - i * blockSize > 0) {if (data.length - i * blockSize > blockSize)cipher.doFinal(data, i * blockSize, blockSize, raw, i * outputSize);elsecipher.doFinal(data, i * blockSize, data.length - i * blockSize, raw, i * outputSize);//这里面doUpdate方法不可用，查看源代码后发现每次doUpdate后并没有什么实际动作除了把byte[]放到ByteArrayOutputStream中，而最后doFinal的时候才将所有的byte[]进行加密，可是到了此时加密块大小很可能已经超出了OutputSize所以只好用dofinal方法。i++;}return raw;} catch (Exception e) {throw new EncryptException(e.getMessage());}}/*** 解密* @param key 解密的密钥* @param raw 已经加密的数据* @return 解密后的明文* @throws EncryptException*/public static byte[] decrypt(Key key, byte[] raw) throws EncryptException {try {Cipher cipher = Cipher.getInstance("RSA", new org.bouncycastle.jce.provider.BouncyCastleProvider());cipher.init(cipher.DECRYPT_MODE, key);int blockSize = cipher.getBlockSize();ByteArrayOutputStream bout = new ByteArrayOutputStream(64);int j = 0;while (raw.length - j * blockSize > 0) {bout.write(cipher.doFinal(raw, j * blockSize, blockSize));j++;}return bout.toByteArray();} catch (Exception e) {throw new EncryptException(e.getMessage());}}File file = new File("test.html");FileInputStream in = new FileInputStream(file);ByteArrayOutputStream bout = new ByteArrayOutputStream();byte[] tmpbuf = new byte[1024];int count = 0;while ((count = in.read(tmpbuf)) != -1) {bout.write(tmpbuf, 0, count);tmpbuf = new byte[1024];}in.close();byte[] orgData = bout.toByteArray();KeyPair keyPair = RSAUtil.generateKeyPair();RSAPublicKey pubKey = (RSAPublicKey) keyPair.getPublic();RSAPrivateKey priKey = (RSAPrivateKey) keyPair.getPrivate();byte[] pubModBytes = pubKey.getModulus().toByteArray();byte[] pubPubExpBytes = pubKey.getPublicExponent().toByteArray();byte[] priModBytes = priKey.getModulus().toByteArray();byte[] priPriExpBytes = priKey.getPrivateExponent().toByteArray();RSAPublicKey recoveryPubKey = RSAUtil.generateRSAPublicKey(pubModBytes,pubPubExpBytes);RSAPrivateKey recoveryPriKey = RSAUtil.generateRSAPrivateKey(priModBytes,priPriExpBytes);byte[] raw = RSAUtil.encrypt(priKey, orgData);file = new File("encrypt_result.dat");OutputStream out = new FileOutputStream(file);out.write(raw);out.close();byte[] data = RSAUtil.decrypt(recoveryPubKey, raw);file = new File("decrypt_result.html");out = new FileOutputStream(file);out.write(data);out.flush();out.close();103.计算文件大小/*import java.io.*;private final long KB=1024;private final long MB=1024*KB;private final long GB=1024*MB;*///文件属性File file=new File(%%1);//如果文件存在而且是文件，直接返回文件大小if(file.exists()&&file.isFile()){long filesize= file.length();String showsize;if(filesize>=GB)showsize=filesize/GB+" GB";else if(filesize>=MB)showsize=filesize/MB+" MB";else if(filesize>=KB)showsize=filesize/KB+" KB";else if(filesize>1)showsize=filesize/GB+" Bytes";elseshowsize="1 Byte";String %%2=showsize;}104.计算文件夹的大小/*import java.io.*;import java.math.*;//bt字节参考量private static final long SIZE_BT=1024L;//KB字节参考量private static final long SIZE_KB=SIZE_BT*1024L;//MB字节参考量private static final long SIZE_MB=SIZE_KB*1024L;//GB字节参考量private static final long SIZE_GB=SIZE_MB*1024L;//TB字节参考量private static final long SIZE_TB=SIZE_GB*1024L;private static final int SACLE=2;//文件大小属性private static long longSize;*/private void getFileSize(File file) {// 获得文件目录下文件对象数组File[] fileArray = file.listFiles();// 如果文件目录数组不为空或者length!=0,即目录为空目录if (fileArray != null && fileArray.length != 0) {// 遍历文件对象数组for (int i = 0; i < fileArray.length; i++) {File fileSI = fileArray[i];// 如果是目录递归遍历if (fileSI.isDirectory()) {// 递归遍历getFileSize(fileSI);}// 如果是文件if (fileSI.isFile()) {longSize += fileSI.length();}}} else {// 如果文件目录数组为空或者length==0,即目录为空目录longSize = 0;}}// 文件存在而且是目录，递归遍历文件目录计算文件大小File file = new File(folderPath);if (file.exists() && file.isDirectory()) {getFileSize(file);// 递归遍历}String %%2="0 Byte";if (longSize == 1) {%%2="1 Byte";} else if (longSize >= 2 && longSize < SIZE_BT) {%%2=longSize + " Bytes";} else if (longSize >= SIZE_BT && longSize < SIZE_KB) {%%2=longSize / SIZE_BT + " KB";} else if (longSize >= SIZE_KB && longSize < SIZE_MB) {%%2=longSize / SIZE_KB + " MB";} else if (longSize >= SIZE_MB && longSize < SIZE_GB) {BigDecimal longs = new BigDecimal(Double.valueOf(longSize + "").toString());BigDecimal sizeMB = new BigDecimal(Double.valueOf(SIZE_MB + "").toString());String result = longs.divide(sizeMB, SACLE,BigDecimal.ROUND_HALF_UP).toString();// double result=longSize/(double)SIZE_MB;%%2=result + " GB";} else {BigDecimal longs = new BigDecimal(Double.valueOf(longSize + "").toString());BigDecimal sizeMB = new BigDecimal(Double.valueOf(SIZE_GB + "").toString());String result = longs.divide(sizeMB, SACLE,BigDecimal.ROUND_HALF_UP).toString();%%2=result + " TB";}105.快速获得当前程序的驱动器、路径、文件名和扩展名String %%2=%%1.substring(0,%%1.lastIndexOf(":"));String %%5=%%1.substring(0,%%1.lastIndexOf("\\"));String %%4=%%1.substring(%%1.lastIndexOf("\\")+1);String %%3=%%1.substring(%%1.lastIndexOf('.'));106.磁盘剩余空间计算//import java.io.*;File file = new File(%%1); //"C:"long %%2 = file.getFreeSpace(); //file.getTotalSpace()107.获取当前程序进程IDjava是在jvm上跑的，jvm本身作为系统的一个进程在跑，所以平时见到的都是java多线程，没有进程间通信，为什么呢，就是因为java中没有进程这一说法，除非指的是程序本身这个进程。这个进程的话需要用到系统命令或者底层c语言才能够得到。呃，本人jni不是太熟悉，可以参考http://hi.baidu.com/lff0305/blog/item/4f301a7b20d3d3f20bd187e3.html，linux下直接调用ps-ef再用管道提取吧。108.全盘搜索文件import java.io.*;//ArrayList fileNames=new ArrayList();void listDirectory(String dir){File f=new File(dir);File[] files=f.listFiles();if(files==null)return;for(int i=0;i<files.length;i++){if(files[i].isDirectory()){System.out.println("-----------"+files[i]+" is a directory has more files bellow:");listDirectory(files[i].getAbsolutePath());//listDirectory(files[i].getName());//listDirectory(files[i].toString());}else{System.out.println(files[i]);}}}File[] roots=File.listRoots();for(int i=0;i<roots.length;i++){System.out.println(roots[i]);}}lrt.listDirectory("D:"+File.separator);