多线程之Thread下载

最新推荐文章于 2024-10-08 21:49:32 发布

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最新推荐文章于 2024-10-08 21:49:32 发布

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本文链接：https://blog.youkuaiyun.com/qq_36478924/article/details/90741719

这是一个Java程序，演示如何通过创建ThreadDown类实现多线程下载图片。每个ThreadDown实例负责下载一个URL对应的图片到指定的本地路径。WebDownloader类包含实际的下载逻辑，使用FileUtils.copyURLToFile方法将URL内容保存到文件。

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/**
* 开线程下载图片
* @author NI
*
*/
public class WebDownloader {

   /**
   * 下载
   * @param url
   * @param dest
   */
   public void download(String url,String dest) {
       try {
           FileUtils.copyURLToFile(new URL(url), new File(dest));
       } catch (MalformedURLException e) {
           e.printStackTrace();
           System.out.println("不合法的路径");
       } catch (IOException e) {
           e.printStackTrace();
           System.out.println("图片下载失败");
       }
   }
}

----------------------------------------------------------------------------------

/**
*
* @author NI
*
*/
public class ThreadDown extends Thread{
   private String url;
   private String name;

   public ThreadDown(String url, String name) {
       this.url = url;
       this.name = name;
   }
   @Override
       public void run() {
       WebDownloader wl = new WebDownloader();
       wl.download(url, name);
       }
   public static void main(String[] args) {
       ThreadDown td1 = new ThreadDown("https://b-ssl.duitang.com/uploads/item/201904/22/20190422193309_y44wV.jpeg", "D:/duowan/phone1.jpg");
       ThreadDown td2 = new ThreadDown("https://b-ssl.duitang.com/uploads/item/201803/27/20180327213616_jzwss.jpg", "D:/duowan/phone2.jpg");
       ThreadDown td3 = new ThreadDown("http://img.mp.itc.cn/upload/20170613/3d5eb52d32534048ae7897862f56c724_th.jpg", "D:/duowan/phone3.jpg");
       td1.start();
       td2.start();
       td3.start();
   }
}