文件3

import java.io.BufferedWriter;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.FileWriter;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.text.SimpleDateFormat;import java.util.Date;import org.apache.commons.logging.LogFactory;import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder;public class FileOperate{public static String mesagePath = "d:\\"; // 日志  public static String nowDateStr = new SimpleDateFormat("yyyyMMdd").format(new Date());/** * 写文件 *  * @param filename * @param str * @throws Exception */public static boolean write1(String filename, String str) {try {BufferedWriter bw = new BufferedWriter(new FileWriter(new File(filename), false));bw.write(str);bw.flush();bw.close();return true;} catch (IOException e) {// TODO Auto-generated catch blockLogFactory.getLog(FileOperate.class).info("写文件异常"+e.getMessage());return false;}}public static boolean write(String filename, String str) {try {BufferedWriter bw = new BufferedWriter(new FileWriter(new File(filename), true));bw.write(str);bw.flush();bw.close();return true;} catch (IOException e) {// TODO Auto-generated catch blockreturn false;}}/** * 根据字符串写成xml文件 * @param fileName * @param xml * @return */public File writeXmlFile(String fileName , String xml){File file = new File(fileName);OutputStream os = null;try {os = new FileOutputStream(file);os.write(xml.getBytes());os.flush();} catch (Exception e) {} finally {try {os.close();} catch (Exception e) {}}return file;}/** * 从InputStream写文件 * @param fileName * @param in * @return */public File writeFromIn(String fileName , InputStream in){File file = new File(fileName);OutputStream os = null;try {os = new FileOutputStream(file);byte buffer[] = new byte[in.available()];while ((in.read(buffer)) != -1) {os.write(buffer);}os.flush();} catch (Exception e) {} finally {try {os.close();} catch (Exception e) {}}return file;}/**  * 删除某个文件夹下的所有文件夹和文件  *  @param delpath String  *  @throws FileNotFoundException  *  @throws IOException * @return boolean */public static boolean deletefile(String delpath){ try { File file = new File(delpath); if (!file.isDirectory()) { file.delete(); } else if (file.isDirectory()) {  String[] filelist = file.list(); for (int i = 0; i < filelist.length; i++){File delfile = new File(delpath + "\\" + filelist[i]);if (!delfile.isDirectory()) {delfile.delete(); } else if (delfile.isDirectory()) { deletefile(delpath + "\\" + filelist[i]); } } //file.delete(); } } catch (Exception e){  e.getMessage(); } return true; }  /**      * 复制整个文件夹内容      * @param oldPath String 原文件路径 ：     * @param newPath String 复制后路径      * @return boolean      */    public static void copyFolder(String oldPath, String newPath) {    FileOutputStream output = null;       FileInputStream input = null;       try {            (new File(newPath)).mkdirs(); //如果文件夹不存在 则建立新文件夹            File a=new File(oldPath);            String[] file=a.list();            File temp=null;                    for (int i = 0; i < file.length; i++) {                if(oldPath.endsWith(File.separator)){                    temp=new File(oldPath+file[i]);                }                else{                    temp=new File(oldPath+File.separator+file[i]);                }                if(temp.isFile()){                    input = new FileInputStream(temp);                    output = new FileOutputStream(newPath + "/" +                            (temp.getName()).toString());                    byte[] b = new byte[1024 * 5];                    int len;                    while ( (len = input.read(b)) != -1) {                        output.write(b, 0, len);                    }                }                if(temp.isDirectory()){//如果是子文件夹                    copyFolder(oldPath+"/"+file[i],newPath+"/"+file[i]);                }            }        }        catch (Exception e) {                    }finally{       try {       if(output != null && input != null)       {output.flush();output.close(); input.close();        }       } catch (IOException e) {          }                  }   }   /**    * 删除文件    * @param fileFath    */   public static void delete(String fileFath){   if(fileFath == null || "".equals(fileFath)){   return ;   }   File file = new File(fileFath);   if(file.isFile() && file.exists()){   file.delete();      }   }   /**    * <p>将文件转成base64 字符串</p>    * @param path 文件路径    * @return    * @throws Exception    */   public static String encodeBase64File(String path) throws Exception {       File  file = new File(path);       FileInputStream inputFile = new FileInputStream(file);       byte[] buffer = new byte[(int)file.length()];       inputFile.read(buffer);       inputFile.close();       return new BASE64Encoder().encode(buffer);   }   /**    * <p>将base64字符解码保存文件</p>    * @param base64Code    * @param targetPath    * @throws Exception    */   public static void decoderBase64File(String base64Code,String targetPath) throws Exception {       byte[] buffer = new BASE64Decoder().decodeBuffer(base64Code);       FileOutputStream out = new FileOutputStream(targetPath);       out.write(buffer);       out.close();   }   /**    * <p>将base64字符保存文本文件</p>    * @param base64Code    * @param targetPath    * @throws Exception    */   public static void toFile(String base64Code,String targetPath) throws Exception {       byte[] buffer = base64Code.getBytes();       FileOutputStream out = new FileOutputStream(targetPath);       out.write(buffer);       out.close();   }   public static void main(String[] args) {       try {           String base64Code =encodeBase64File("C:\\123.pdf");           System.out.println(base64Code);           decoderBase64File(base64Code, "D:\\456.PDF");           toFile(base64Code, "D:\\three.txt");                  } catch (Exception e) {           e.printStackTrace();       }   }  }