删除和拷贝文件递归方法（Java实现）

利用递归的方法删除和拷贝文件原理很简单：程序自己调用自己
实现文件的删除和拷贝，代码如下：

import java.io.*;
public class Dptest {
//删除指定文件夹下的所有文件及根文件夹
public void deleteFile(String path) {
    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 {
    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 {
    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:/xxx");
    // dp.copyFiles("c:/yyy", "c:/zzz");
    }
}