多线程详解p4网图下载

import org.apache.commons.io.FileUtils;
import java.io.File;
import java.io.IOException;
import java.net.URL;
public class TestThread2  extends Thread{
    //练习Thread，实现多线程同步下载图片
    private String url;//网络图片地址
    private String name;//保存的文件名
    public TestThread2(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) {
        TestThread2 t1 = new TestThread2("", "");
        TestThread2 t2 = new TestThread2("", "");
        TestThread2 t3 = new TestThread2("", "");
        t1.start();
        t2.start();
        t3.start();
    }
}
//下载器
class WebDownloader{
    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");
        }
    }
}