文件处理类FileUtil

/** * all rights reserved by ming, 2005 */package com.koubei.util;import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.FileWriter;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.PrintWriter;import java.util.StringTokenizer;public class FileOperate {static String message;public FileOperate() {}/** * 读取文本文件内容 *  * @param filePathAndName *            带有完整绝对路径的文件名 * @param encoding *            文本文件打开的编码方式 * @return 返回文本文件的内容 */public static String readTxt(String filePathAndName, String encoding)throws IOException {encoding = encoding.trim();StringBuffer str = new StringBuffer("");String st = "";try {FileInputStream fs = new FileInputStream(filePathAndName);InputStreamReader isr;if (encoding.equals("")) {isr = new InputStreamReader(fs);} else {isr = new InputStreamReader(fs, encoding);}BufferedReader br = new BufferedReader(isr);try {String data = "";while ((data = br.readLine()) != null) {str.append(data + " ");}} catch (Exception e) {str.append(e.toString());}st = str.toString();} catch (IOException es) {st = "";}return st;}/** * 新建目录 *  * @param folderPath *            目录 * @return 返回目录创建后的路径 */public static String createFolder(String folderPath) {String txt = folderPath;try {java.io.File myFilePath = new java.io.File(txt);txt = folderPath;if (!myFilePath.exists()) {myFilePath.mkdirs();}} catch (Exception e) {e.printStackTrace();message = "创建目录操作出错";}return txt;}/** * 多级目录创建 *  * @param folderPath *            准备要在本级目录下创建新目录的目录路径 例如 c:myf * @param paths *            无限级目录参数，各级目录以单数线区分 例如 a|b|c * @return 返回创建文件后的路径 例如 c:myfac */public static String createFolders(String folderPath, String paths) {String txts = folderPath;try {String txt;txts = folderPath;StringTokenizer st = new StringTokenizer(paths, "|");for (int i = 0; st.hasMoreTokens(); i++) {txt = st.nextToken().trim();if (txts.lastIndexOf("/") != -1) {txts = createFolder(txts + txt);} else {txts = createFolder(txts + txt + "/");}}} catch (Exception e) {message = "创建目录操作出错！";}return txts;}/** * 新建文件 *  * @param filePathAndName *            文本文件完整绝对路径及文件名 * @param fileContent *            文本文件内容 * @return */public static void createFile(String filePathAndName, String fileContent) {try {String filePath = filePathAndName;filePath = filePath.toString();File myFilePath = new File(filePath);if (!myFilePath.exists()) {myFilePath.createNewFile();}FileWriter resultFile = new FileWriter(myFilePath);PrintWriter myFile = new PrintWriter(resultFile);String strContent = fileContent;myFile.println(strContent);myFile.close();resultFile.close();} catch (Exception e) {message = "创建文件操作出错";}}/** * 有编码方式的文件创建 *  * @param filePathAndName *            文本文件完整绝对路径及文件名 * @param fileContent *            文本文件内容 * @param encoding *            编码方式 例如 GBK 或者 UTF-8 * @return */public static void createFile(String filePathAndName, String fileContent,String encoding) {try {String filePath = filePathAndName;filePath = filePath.toString();File myFilePath = new File(filePath);if (!myFilePath.exists()) {myFilePath.createNewFile();}PrintWriter myFile = new PrintWriter(myFilePath, encoding);String strContent = fileContent;myFile.println(strContent);myFile.close();} catch (Exception e) {message = "创建文件操作出错";}}/** * 删除文件 *  * @param filePathAndName *            文本文件完整绝对路径及文件名 * @return Boolean 成功删除返回true遭遇异常返回false */public static boolean delFile(String filePathAndName) {boolean bea = false;try {String filePath = filePathAndName;File myDelFile = new File(filePath);if (myDelFile.exists()) {myDelFile.delete();bea = true;} else {bea = false;message = (filePathAndName + "删除文件操作出错");}} catch (Exception e) {message = e.toString();}return bea;}/** * 删除文件夹 *  * @param folderPath *            文件夹完整绝对路径 * @return */public static void delFolder(String folderPath) {try {delAllFile(folderPath); // 删除完里面所有内容String filePath = folderPath;filePath = filePath.toString();java.io.File myFilePath = new java.io.File(filePath);myFilePath.delete(); // 删除空文件夹} catch (Exception e) {message = ("删除文件夹操作出错");}}/** * 删除指定文件夹下所有文件 *  * @param path *            文件夹完整绝对路径 * @return * @return */public static boolean delAllFile(String path) {boolean bea = false;File file = new File(path);if (!file.exists()) {return bea;}if (!file.isDirectory()) {return bea;}String[] tempList = file.list();File temp = null;for (int i = 0; i < tempList.length; i++) {if (path.endsWith(File.separator)) {temp = new File(path + tempList[i]);} else {temp = new File(path + File.separator + tempList[i]);}if (temp.isFile()) {temp.delete();}if (temp.isDirectory()) {delAllFile(path + "/" + tempList[i]);// 先删除文件夹里面的文件delFolder(path + "/" + tempList[i]);// 再删除空文件夹bea = true;}}return bea;}/** * 复制单个文件 *  * @param oldPathFile *            准备复制的文件源 * @param newPathFile *            拷贝到新绝对路径带文件名 * @return */public static void copyFile(String oldPathFile, String newPathFile) {try {int bytesum = 0;int byteread = 0;File oldfile = new File(oldPathFile);if (oldfile.exists()) { // 文件存在时InputStream inStream = new FileInputStream(oldPathFile); // 读入原文件FileOutputStream fs = new FileOutputStream(newPathFile);byte[] buffer = new byte[1444];while ((byteread = inStream.read(buffer)) != -1) {bytesum += byteread; // 字节数 文件大小fs.write(buffer, 0, byteread);}inStream.close();}} catch (Exception e) {e.printStackTrace();message = ("复制单个文件操作出错");}}/****** *  * @param oldPathFile * @param newPathFile * @param filename */public static void copyFile(String oldPathFile, String newPathFile,String filename) {try {int bytesum = 0;int byteread = 0;File oldfile = new File(oldPathFile);newPathFile+=filename;if (oldfile.exists()) { // 文件存在时InputStream inStream = new FileInputStream(oldPathFile); // 读入原文件FileOutputStream fs = new FileOutputStream(newPathFile);byte[] buffer = new byte[1444];while ((byteread = inStream.read(buffer)) != -1) {bytesum += byteread; // 字节数 文件大小fs.write(buffer, 0, byteread);}inStream.close();}} catch (Exception e) {e.printStackTrace();message = ("复制单个文件操作出错");}}/** * 复制整个文件夹的内容 *  * @param oldPath *            准备拷贝的目录 * @param newPath *            指定绝对路径的新目录 * @return */public static void copyFolder(String oldPath, String newPath) {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()) {FileInputStream input = new FileInputStream(temp);FileOutputStream 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);}output.flush();output.close();input.close();}if (temp.isDirectory()) {// 如果是子文件夹copyFolder(oldPath + "/" + file[i], newPath + "/" + file[i]);}}} catch (Exception e) {e.printStackTrace();message = "复制整个文件夹内容操作出错";}}/** * 移动文件 *  * @param oldPath * @param newPath * @return */public static void moveFile(String oldPath, String newPath) {copyFile(oldPath, newPath);delFile(oldPath);}/** * 移动目录 *  * @param oldPath * @param newPath * @return */public static void moveFolder(String oldPath, String newPath) {copyFolder(oldPath, newPath);delFolder(oldPath);}public static String getMessage() {return message;}/** * 根据id来确定图片放置路径 *  * @param infoId - 数字编号 * @return 分隔目录 */public static String getPathById(int infoId) {return getPathById(infoId+"");}/** * 根据id来确定图片放置路径 *  * @param infoId - 字符编号 * @return 分隔目录 */public static String getPathById(String infoId) {StringBuffer path = new StringBuffer();while (infoId.length() > 1) {path.append(infoId.substring(0, 2)).append("/");infoId = infoId.substring(2);}if (infoId.length() > 0)path.append(infoId).append("/");return path.toString();}}