深层遍历一个目录下面的子目录子文件

深层遍历---------dfs（递归）

package test;
 
 
import java.io.*;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.zip.InflaterInputStream;
 
import javax.annotation.processing.FilerException;
 
import privateclass.Filterby_Name;
import privateclass.Filterby_hidden;
import privateclass.Filterby_java;
import privateclass.MyBufferedReader;
 
public class Main {
 
    private static final String space_operator = " ";
    private static final double pi = Math.PI;
    private static final String LINE_SEPARATOR = System.getProperty("line.separator");
    public static void main(String[] args) throws Exception {
 
        File file = new File("d:\文档");
        listall(file,0);
         
    }
    public static void listall(File file,int deep) {
        System.out.println(getdeep(deep) + file.getName());
        deep++;
        for(File x : file.listFiles())
        {
            if(x.isDirectory())
            {
                listall(x,deep);
            }
            else
            {
                System.out.println(getdeep(deep) + x.getName());
            }
        }
         
    }
    public static String getdeep(int deep) {
        StringBuilder s = new StringBuilder();
        for(int i = 0; i < deep; i ++)
        {
            s.append("    ");
        }
        return s.toString();
    }
}