Java File 文件操作详解编程语言

 public static long getFileSize(File f) throws Exception { 

 long size = 0; 

 File flist[] = f.listFiles(); 

 for (int i = 0; i flist.length; i++) { 

 if (flist[i].isDirectory()) { 

 size = size + getFileSize(flist[i]); 

 } else { 

 size = size + flist[i].length(); 

 return size; 

 } 

public static String FormetFileSize(long fileS) { 

 DecimalFormat df = new DecimalFormat("#.00"); 

 String fileSizeString = ""; 

 if (fileS == 0) { 

 fileSizeString = "0KB"; 

 } else if (fileS 1024) { 

 fileSizeString = df.format((double) fileS) + "B"; 

 } else if (fileS 1048576) { 

 fileSizeString = df.format((double) fileS / 1024) + "KB"; 

 } else if (fileS 1073741824) { 

 fileSizeString = df.format((double) fileS / 1048576) + "MB"; 

 } else { 

 fileSizeString = df.format((double) fileS / 1073741824) + "G"; 

 return fileSizeString; 

 } 

public static void deleteFolderFile(String filePath, boolean deleteThisPath) 

 throws IOException { 

 if (!TextUtils.isEmpty(filePath)) { 

 File file = new File(filePath); 

 if (file.isDirectory()) {// 处理目录 

 File files[] = file.listFiles(); 

 for (int i = 0; i files.length; i++) { 

 deleteFolderFile(files[i].getAbsolutePath(), true); 

 if (deleteThisPath) { 

 // 如果是文件，删除 

 if (!file.isDirectory()) { 

 file.delete(); 

 } else { 

 // 目录下没有文件或者目录，删除 

 if (file.listFiles().length == 0) { 

 file.delete(); 

 } 

 /** 

 * 获取文件名 

 * @param path 

 * @return 

 public static String getFileName(String path) { 

 int start = path.lastIndexOf("/") + 1; 

 return path.substring(start); 

 /** 

 * 获取文件名 

 * @param file 

 * @return 

 public static String getFileName(File file) { 

 String filePath = file.getAbsolutePath(); 

 return getFileName(filePath); 

 } 

原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/10579.html