JAVA文件操作方法汇总

    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);       }    }