java--递归拷贝目录

package com.test;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import com.DIGUI;

public class test_4 {

public static void main(String[] args) throws IOException {
	File src =getDir();
	File dest =getDir();
	copy(src,dest);
}
public static void copy(File src , File dest) throws IOException {
	File newDir=new File(dest,src.getName());
	newDir.mkdir();
	File[] subFiles =src.listFiles();
	for (File file : subFiles) {
		if(file.isFile()) {
			BufferedInputStream bis =new BufferedInputStream(new FileInputStream(file));
			BufferedOutputStream bos =new BufferedOutputStream(new FileOutputStream(new File(newDir,file.getName())));
			int b;
			while((b=bis.read()) != -1) {
				bos.write(b);
			}
			bis.close();
			bos.close();
		}else {
			copy(file,newDir);
		}
	}
}
  	public static File getDir() {
	System.out.println("please:");
	Scanner sc =new Scanner(System.in); 
	while(true) {
		String line = sc.nextLine();
		File dir =new File(line);
		if(!dir.exists()) {
			System.out.println("路基不存在");
		}else if(dir.isFile()) {
			System.out.println("是文件");
		}else {
			return dir;
		}
	}
}