java.io.file 各种文件操作

1. package cn.edu.tongji.cims.wade.system;     import java.io.*;     public class FileOperate {     public FileOperate() {     }       /**     * 新建目录     * @param folderPath String 如 c:/fqf     * @return boolean     */    public void newFolder(String folderPath) {       try {         String filePath = folderPath;         filePath = filePath.toString();         java.io.File myFilePath = new java.io.File(filePath);         if (!myFilePath.exists()) {           myFilePath.mkdir();         }       }       catch (Exception e) {         System.out.println("新建目录操作出错");         e.printStackTrace();       }     }       /**     * 新建文件     * @param filePathAndName String 文件路径及名称 如c:/fqf.txt     * @param fileContent String 文件内容     * @return boolean     */    public void newFile(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);         resultFile.close();         }       catch (Exception e) {         System.out.println("新建目录操作出错");         e.printStackTrace();         }       }       /**     * 删除文件     * @param filePathAndName String 文件路径及名称 如c:/fqf.txt     * @param fileContent String     * @return boolean     */    public void delFile(String filePathAndName) {       try {         String filePath = filePathAndName;         filePath = filePath.toString();         java.io.File myDelFile = new java.io.File(filePath);         myDelFile.delete();         }       catch (Exception e) {         System.out.println("删除文件操作出错");         e.printStackTrace();         }       }       /**     * 删除文件夹     * @param filePathAndName String 文件夹路径及名称 如c:/fqf     * @param fileContent String     * @return boolean     */    public 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) {         System.out.println("删除文件夹操作出错");         e.printStackTrace();         }       }       /**     * 删除文件夹里面的所有文件     * @param path String 文件夹路径 如 c:/fqf     */    public void delAllFile(String path) {       File file = new File(path);       if (!file.exists()) {         return;       }       if (!file.isDirectory()) {         return;       }       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         }       }     }       /**     * 复制单个文件     * @param oldPath String 原文件路径 如：c:/fqf.txt     * @param newPath String 复制后路径 如：f:/fqf.txt     * @return boolean     */    public void copyFile(String oldPath, String newPath) {       try {         int bytesum = 0;         int byteread = 0;         File oldfile = new File(oldPath);         if (oldfile.exists()) { //文件存在时           InputStream inStream = new FileInputStream(oldPath); //读入原文件           FileOutputStream fs = new FileOutputStream(newPath);           byte[] buffer = new byte[1444];           int length;           while ( (byteread = inStream.read(buffer)) != -1) {             bytesum += byteread; //字节数 文件大小             System.out.println(bytesum);             fs.write(buffer, 0, byteread);           }           inStream.close();         }       }       catch (Exception e) {         System.out.println("复制单个文件操作出错");         e.printStackTrace();         }       }       /**     * 复制整个文件夹内容     * @param oldPath String 原文件路径 如：c:/fqf     * @param newPath String 复制后路径 如：f:/fqf/ff     * @return boolean     */    public 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) {         System.out.println("复制整个文件夹内容操作出错");         e.printStackTrace();         }       }       /**     * 移动文件到指定目录     * @param oldPath String 如：c:/fqf.txt     * @param newPath String 如：d:/fqf.txt     */    public void moveFile(String oldPath, String newPath) {       copyFile(oldPath, newPath);       delFile(oldPath);       }       /**     * 移动文件到指定目录     * @param oldPath String 如：c:/fqf.txt     * @param newPath String 如：d:/fqf.txt     */    public void moveFolder(String oldPath, String newPath) {       copyFolder(oldPath, newPath);       delFolder(oldPath);       }   }