这是我自己写的一个历遍目录的类，使用了递归方法，如果大家谁需要，就随便那去用吧！

import java.io.*;
import java.util.*;

public class ListDirectory {
        
        public static int listDir(String dir, ArrayList listFile) throws IOException {
                int result = 0;
                File file = new File(dir);
                File fileList[];
                if (!file.isDirectory()) {
                        result = -1;
                } else {
                        fileList = file.listFiles();
                        for (int i=0; i<fileList.length; i++) {
                                if (fileList[i].isDirectory()) {
                                        listDir(fileList[i].getPath(), listFile);
                                } else {
                                        listFile.add(fileList[i].getPath());
                                }
                        }
                }
                return result;
        }
}