Runnable小练习(网图下载)

Posted 2022-08-18 小郑要做干饭人

package com.zzx.线程.Runnable;

import org.apache.commons.io.FileUtils;

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

/**
 * @date: 2022/08/10/ 22:55
 * @author: ZhengZiXuan
 * @title: 练习Thread,实现一个多线程同步下载图片
 * @description:
 */
public class RunnablePractise implements Runnable

    //网络图片地址
    private String url;

    //保存的文件名
    private String 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 RunnablePractise(String url,String name) 
        this.name=name;
        this.url = url;
    

    public static void main(String[] args) 
        RunnablePractise t1 = new RunnablePractise("https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2021%2F0731%2Fe91198a9j00qx35q30050c000j600nym.jpg&thumbnail=660x2147483647&quality=80&type=jpg","小姐姐1.jpg");
        RunnablePractise t2 = new RunnablePractise("https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2020%2F0308%2Faa2f8437j00q6uv1c001fc000hs00hsm.jpg&thumbnail=660x2147483647&quality=80&type=jpg","小姐姐2.jpg");
        RunnablePractise t3 = new RunnablePractise("https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2020%2F0308%2F94d8bda3j00q6uv1e000oc000hs00m7m.jpg&thumbnail=660x2147483647&quality=80&type=jpg","小姐姐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 pictureUrl, String name)
        try 
            FileUtils.copyURLToFile(new URL(pictureUrl),new File(name));
         catch (IOException e) 
            e.printStackTrace();
            System.err.println("IO异常,downloader方法出现问题");
        
    

控制台运行结果如下:


经过多次试验我们发现,调用start方法时,线程是同时运行的