请问，这该如何写？

Question

java.io.File
java.io.*查看ＪＤＫ帮助。

Answer 1

import java.io.File;public class MakeDir{
 
              static File f = new File("d:\\java-io");
                         
     
              static public void md(){
                          
                          f.mkdir();
                          }
                          
                          
              static public void dd(){
                        
                         f.delete();
                       }
                        
              public static void main(String [] args)throws Exception{
              
                                 md();
                                
                                if(f.isDirectory()){
                                 File [] fe = f.listFiles();
                                   go_on:
                                   for (int i = 0;i<fe.length;i++){
                                    if (fe[i].isDirectory()){
                                    File [] fe1 = fe[i].listFiles();
                                      for (int j = 0;j<fe1.length;j++){
                                       if (fe1[j].isDirectory())
                                       continue go_on;
                                       else System.out.println(fe1[i].toString());
                                    }
                                   
                                        }
                                   
                                   else System.out.println(fe[i].toString());
                                   
                                      
                                   
                                    }
                                 }
                               }
                       }

Answer 2

import java.io.File;public class MakeDir{
 
              static File f = new File("d:\\java-io");
                         
     
              static public void md(){
                          
                          f.mkdir();
                          }
                          
                          
              static public void dd(){
                        
                         f.delete();
                       }
                        
              public static void main(String [] args)throws Exception{
              
                           md();
                                
                          if(f.isDirectory()){
                          File [] fe = f.listFiles();
                           go_on:
                           for (int i = 0;i<fe.length;i++){
                           if (fe[i].isDirectory()){
                              File [] fe1 = fe[i].listFiles();
                               for (int j = 0;j<fe1.length;j++){
                                if (fe1[j].isDirectory())
                                continue go_on;
                             
                                  }
                                   
                                    }
                                   
                           else System.out.println(fe[i].toString());
                                   
                                      
                                   
                                }
                             }
                         }
                     }
              
                                   
              

Answer 3

递归
import java.io.*;
class A
{
public static void main(String[] args)
{
File file=new File("c:\\test");
         A a=new A();
a.read(file); }
public void read(File f)
{
File[] files=f.listFiles();
for(int i=0;i<files.length;i++)
{
File tmpFile=files[i]; if(tmpFile.isDirectory())
this.read(tmpFile);
else
System.out.println("file:"+tmpFile);
}
}}

Answer 4

<%@ page contentType="text/html; charset=gb2312" %>
<%@ page import="java.io.*" %>
<%
String url1="C:/aaa";
File  f=(new File(url1));
if(f.isDirectory()){
                          File [] fe = f.listFiles();
                           go_on:
                           for (int i = 0;i<fe.length;i++){
                           if (fe[i].isDirectory()){
                                  
                              File [] fe1 = fe[i].listFiles();
                               for (int j = 0;j<fe1.length;j++){
                                if (fe1[j].isDirectory())
                                continue go_on;
                                 out.println(fe1[j].toString());
            }
        }                 
     else out.println(fe[i].toString());
    }
  }
                        
%>