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);

    }

}