java递归实现文件的删除和拷贝

 

递归？简单点：程序自己调用自己

实现文件的删除和拷贝，代码如下：

package com.viita; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; public class Dptest {          //删除制定文件夹的所有文件及根文件夹     public void deleteFile(String path) {         // TODO Auto-generated method stub         File f = new File(path);         if(f.isDirectory())         {             File[] file = f.listFiles();             for (File file2 : file) {                 this.deleteFile(file2.toString());                 file2.delete();             }         }else         {             f.delete();         }         f.delete();     }          //拷贝整个文件夹的方法     public void copyFiles(String path1, String path2) throws Exception {         // TODO Auto-generated method stub         File file = new File(path1);         if(file.isDirectory())         {             File f = new File(path2);             if(!f.exists()) f.mkdir();             File[] files = file.listFiles();             for (File file2 : files) {                 //System.out.println(file2.toString()+"-----"+path2+"/"+file2.getName());                 copyFiles(file2.toString(),path2+"/"+file2.getName());             }                      }else         {             copy(path1,path2);         }     }          //拷贝单个文件的方法     public void copy(String path1,String path2) throws IOException {         // TODO Auto-generated method stub                                   DataInputStream in = new DataInputStream(                 new BufferedInputStream(                         new FileInputStream(path1)));                  byte[] date = new byte[in.available()];                  in.read(date);                  DataOutputStream out = new DataOutputStream(                 new BufferedOutputStream(                         new FileOutputStream(path2)));         out.write(date);                  in.close();         out.close();     }     public static void main(String[] args) throws Exception {         Dptest dp = new Dptest();         dp.deleteFile("c:/wmpub"); //        dp.copyFiles("c:/新建文件夹", "c:/xiao");     } }