多线程下载网图

package demo1;

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

public class TestThread2 extends TestThread{
    private String url;
    private String name;
    public TestThread2(String url,String name) {//在有参构造中传入参数，为实例变量初始化值
        this.url = url;
        this.name = name;
    }

    @Override
    public void run() {//重写run()方法
        WebDownloader webDownloader = new WebDownloader();
        webDownloader.Download(url,name);
        System.out.println("下载类文件名为:"+name);
    }

    public static void main(String[] args) {
        //挨个创建对象并且执行构造方法
        TestThread2 t1 = new TestThread2("https://www.apple.com.cn/v/imac-24/e/images/overview/colors_lifestyle_fallback__fat816a51hua_large.jpg","p1.jpg");
        TestThread2 t2 = new TestThread2("https://img1.baidu.com/it/u=3855106272,1253404534&fm=253&fmt=auto&app=138&f=JPEG?w=678&h=500","p2.jpg");
        TestThread2 t3 = new TestThread2("https://img1.baidu.com/it/u=3252704542,3882037568&fm=253&fmt=auto&app=138&f=JPEG?w=889&h=500","p3.jpg");
        //加入线程，并发执行run()方法
        t1.start();
        t2.start();
        t3.start();
    }
}


//下载类
class WebDownloader{
    public void Download(String url,String name){
        try {//使用FileUtils.copyURLToFile方法将url下的图片保存至文件
            FileUtils.copyURLToFile(new URL(url),new File(name));//快捷键option+command+t调出代码包裹
        } catch (IOException e) {
            e.printStackTrace();
            System.out.println("IO异常");
        }
    }
}