Java遍历文件夹的2种方法

A.不使用递归： import java.io.File;import java.util.LinkedList;public class FileSystem { public static void main(String[] args) { long a = System.currentTimeMillis(); LinkedList list = new LinkedList(); File dir = new File("c:\\java\\"); File file[] = dir.listFiles(); for (int i = 0; i < file.length; i++) { if (file[i].isDirectory()) list.add(file[i]); else System.out.println(file[i].getAbsolutePath()); } File tmp; while (!list.isEmpty()) { tmp = list.removeFirst(); if (tmp.isDirectory()) { file = tmp.listFiles(); if (file == null) continue; for (int i = 0; i < file.length; i++) { if (file[i].isDirectory()) list.add(file[i]); else System.out.println(file[i].getAbsolutePath()); } } else { System.out.println(tmp.getAbsolutePath()); } } System.out.println(System.currentTimeMillis() - a); }}

B.使用递归：

       import java.io.File;import java.util.ArrayList;public class FileSystem1 {    private static ArrayList filelist = new ArrayList();         public static void main(String[] args) {                long a = System.currentTimeMillis();        refreshFileList("c:\\java");        System.out.println(System.currentTimeMillis() - a);    }    public static void refreshFileList(String strPath) {         File dir = new File(strPath);         File[] files = dir.listFiles();                 if (files == null)             return;         for (int i = 0; i < files.length; i++) {             if (files[i].isDirectory()) {                 refreshFileList(files[i].getAbsolutePath());             } else {                 String strFileName = files[i].getAbsolutePath().toLowerCase();                System.out.println("---"+strFileName);                filelist.add(files[i].getAbsolutePath());                                }         }     }}
结论：经过测试，使用递归的方法B性能相对好一些。