模拟联系Thread，实现多线程同步下载图片

package Thread;

import org.apache.commons.io.FileUtils;
import java.io.File;
import java.io.IOException;
import java.net.URL;

//联系Thread，实现多线程同步下载图片
public class threadDemo2 extends Thread {
    private String url;//网络图片地址
    private String name;//保存的文件名

    public threadDemo2(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+"的文件");
    }

    public static void main(String[] args) {
        threadDemo2 t1 = new threadDemo2("http://img.tuguaishou.com/ips_templ_preview/w432_q100/c5/f6/a7/lg_2559370_1572354908_5db83b5c038ec.jpg?auth_key=2239632000-0-0-6c120c2d0677dc637cb897b4e030d240", "1.jpg");
        threadDemo2 t2 = new threadDemo2("http://img.tuguaishou.com/ips_templ_preview/w432_q100/f9/15/19/lg_3402655_1603039421_5f8c70bd859a6.jpg?auth_key=2239632000-0-0-12b2428b47e0b0163ba832a29b2a3951", "2.jpg");
        threadDemo2 t3 = new threadDemo2("http://img.tuguaishou.com/ips_templ_preview/w432_q100/c5/f6/a7/lg_2559370_1572354908_5db83b5c038ec.jpg?auth_key=2239632000-0-0-6c120c2d0677dc637cb897b4e030d240", "3.jpg");
        t1.start();
        t2.start();
        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！");
        }
    }
}

FileUtils是一个工具类，需要下载对应的包，百度搜即可；

 最后结果：顺序是随机的；