+ View Code?

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// 工具方法 private static FilenameFilter getFilter(final String mode) {         return new FilenameFilter() {             Pattern pattern;                           {                 pattern = Pattern.compile(mode);             }                           public boolean accept(File file, String name) {                 return pattern.matcher(name).matches();             }                       }; }   // 调用该接口, 可修改为返回 fs : File[] public static void find(File dir) {         if (dir.isDirectory()) {             File[] tfs = dir.listFiles();             // 复制子目录             File[] cfs = new File[tfs.length];             int count = 0;             for (File fs : tfs) {                 if (fs.isDirectory()) {                     cfs[count++] = fs;                 }             }             // 递归遍历子目录             for (int i = 0; i < count; i++) {                 find(cfs[i]);             }             // 将该目录下的所有文件夹匹配正则表达式             File[] fs = dir.listFiles(getFilter(".+\\.java"));             /*             // 由于需要递归, 所以不能在此创建匿名内部类, 而应使用单例             fs = dir.listFiles(                 new FilenameFilter() {                     Pattern pattern;                                           // 匿名内部类的构造块                     {                         pattern = Pattern.compile(".+\\.java");                     }                                           // 对于一个 File 数组, 将所有元素依次传入该回调函数, 以询问是否同意该元素加入集合, 其中 namne 等价于 f.getName()                     public boolean accept(File f, String name) {                         return pattern.matcher(name).matches();                     }             });             */             // 打印当前已筛选的文件的全路径             for(File f : fs) {                 try{                     System.out.println(f.getCanonicalPath());                 } catch(IOException e) {                     e.printStackTrace();                 }             }         } }