public class Thread1 implements Runnable {
    private String url;
    private String name;
    public Thread1(String url,String name){
        this.url=url;
        this.name=name;
    }

    @Override
    public void run() {
        WebDownloader webDownloader=new WebDownloader();
        webDownloader.downloader(url,name);
        System.out.println("下载了文件名为:"+name);
    }

    public static void main(String[] args) {
        Thread1 t1=new Thread1("https://gimg2.baidu.com/image_search/src=http%3A%2F%2F1812.img.pp.sohu.com.cn%2Fimages%2Fblog%2F2009%2F11%2F18%2F18%2F8%2F125b6560a6ag214.jpg&refer=http%3A%2F%2F1812.img.pp.sohu.com.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1626153777&t=bd341a9f4ae5498503823c0e7d30cfd3","1.jpg");
        Thread1 t2=new Thread1("https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fcar0.autoimg.cn%2Fupload%2F2013%2F1%2F15%2Fu_20130115225028999264.jpg&refer=http%3A%2F%2Fcar0.autoimg.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1626153893&t=e2c4bac17511a5e0901293d3d33ae664","2.jpg");
        Thread1 t3=new Thread1("https://q-extra.paixin.com/admin/1593661475237.png","3.jpg");
        new Thread(t1).start();
        new Thread(t2).start();
        new Thread(t3).start();
    }
}

//下载器
class WebDownloader{
    //下载方法
    public void downloader(String url,String name){
        try {
            FileUtils.copyURLToFile(new URL(url),new File(name));
        } catch (IOException e) {
            e.printStackTrace();
            System.out.println("IO异常,downloader方法出现问题");
        }
    }
}