多线程下载图片

import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

import org.apache.commons.io.FileUtils;
/*
 * 下载类
 */
public class WebDownload {
    public void download(String url,String name){
        try {
            FileUtils.copyURLToFile(new URL(url), new File(name));
        } catch (MalformedURLException e) {
            System.out.println("不合法的URL");
        } catch (IOException e) {
            System.out.println("下载失败");
        }
        
    }

}

/*
 * 多线程实现方式一
 */
public class DownLoader extends Thread{
    private String url;
    private String name;
    public DownLoader(String url, String name) {
        super();
        this.url = url;
        this.name = name;
    }
    @Override
    public void run() {
        WebDownload wdl=new WebDownload();
        wdl.download(url, name);
        System.out.println(this.getName());
    }
    public static void main(String[] args) {
        DownLoader dl1=new DownLoader("https://ss0.bdstatic.com/70cFvHSh_Q1YnxGkpoWK1HF6hhy/it/u=1237924924,3470614764&fm=26&gp=0.jpg","tupian/haitun.jpg");
        DownLoader dl2=new DownLoader("https://ss0.bdstatic.com/70cFuHSh_Q1YnxGkpoWK1HF6hhy/it/u=1317686978,2345730812&fm=26&gp=0.jpg","tupian/laoshu.jpg");
        DownLoader dl3=new DownLoader("https://ss2.bdstatic.com/70cFvnSh_Q1YnxGkpoWK1HF6hhy/it/u=2531381064,3648016782&fm=26&gp=0.jpg","tupian/tiger.jpg");
        dl1.start();
        dl2.start();
        dl3.start();
    }

}

/*
 * 多线程实现方式二
 */
public class DownLoader2 implements Runnable{
    private String url;
    private String name;
    

    public DownLoader2(String url, String name) {
        super();
        this.url = url;
        this.name = name;
    }


    @Override
    public void run() {
        WebDownload wdl=new WebDownload();
        wdl.download(url, name);
        System.out.println(Thread.currentThread().getName());
        
    }
    public static void main(String[] args) {
        DownLoader2 dl1=new DownLoader2("https://ss0.bdstatic.com/70cFvHSh_Q1YnxGkpoWK1HF6hhy/it/u=1237924924,3470614764&fm=26&gp=0.jpg","tupian/haitun.jpg");
        DownLoader2 dl2=new DownLoader2("https://ss0.bdstatic.com/70cFuHSh_Q1YnxGkpoWK1HF6hhy/it/u=1317686978,2345730812&fm=26&gp=0.jpg","tupian/laoshu.jpg");
        DownLoader2 dl3=new DownLoader2("https://ss2.bdstatic.com/70cFvnSh_Q1YnxGkpoWK1HF6hhy/it/u=2531381064,3648016782&fm=26&gp=0.jpg","tupian/tiger.jpg");
        Thread t1=new Thread(dl1);
        Thread t2=new Thread(dl2);
        Thread t3=new Thread(dl3);
        t1.start();
        t2.start();
        t3.start();
        
    }

}