1 import java.io.File;
2 import java.io.IOException;
3 import java.net.MalformedURLException;
4 import java.net.URL;
5
6 import org.apache.commons.io.FileUtils;
7 /*
8 * 下载类
9 */
10 public class WebDownload {
11 public void download(String url,String name){
12 try {
13 FileUtils.copyURLToFile(new URL(url), new File(name));
14 } catch (MalformedURLException e) {
15 System.out.println("不合法的URL");
16 } catch (IOException e) {
17 System.out.println("下载失败");
18 }
19
20 }
21
22 }
1 /*
2 * 多线程实现方式一
3 */
4 public class DownLoader extends Thread{
5 private String url;
6 private String name;
7 public DownLoader(String url, String name) {
8 super();
9 this.url = url;
10 this.name = name;
11 }
12 @Override
13 public void run() {
14 WebDownload wdl=new WebDownload();
15 wdl.download(url, name);
16 System.out.println(this.getName());
17 }
18 public static void main(String[] args) {
19 DownLoader dl1=new DownLoader("https://ss0.bdstatic.com/70cFvHSh_Q1YnxGkpoWK1HF6hhy/it/u=1237924924,3470614764&fm=26&gp=0.jpg","tupian/haitun.jpg");
20 DownLoader dl2=new DownLoader("https://ss0.bdstatic.com/70cFuHSh_Q1YnxGkpoWK1HF6hhy/it/u=1317686978,2345730812&fm=26&gp=0.jpg","tupian/laoshu.jpg");
21 DownLoader dl3=new DownLoader("https://ss2.bdstatic.com/70cFvnSh_Q1YnxGkpoWK1HF6hhy/it/u=2531381064,3648016782&fm=26&gp=0.jpg","tupian/tiger.jpg");
22 dl1.start();
23 dl2.start();
24 dl3.start();
25 }
26
27 }
1 /*
2 * 多线程实现方式二
3 */
4 public class DownLoader2 implements Runnable{
5 private String url;
6 private String name;
7
8
9 public DownLoader2(String url, String name) {
10 super();
11 this.url = url;
12 this.name = name;
13 }
14
15
16 @Override
17 public void run() {
18 WebDownload wdl=new WebDownload();
19 wdl.download(url, name);
20 System.out.println(Thread.currentThread().getName());
21
22 }
23 public static void main(String[] args) {
24 DownLoader2 dl1=new DownLoader2("https://ss0.bdstatic.com/70cFvHSh_Q1YnxGkpoWK1HF6hhy/it/u=1237924924,3470614764&fm=26&gp=0.jpg","tupian/haitun.jpg");
25 DownLoader2 dl2=new DownLoader2("https://ss0.bdstatic.com/70cFuHSh_Q1YnxGkpoWK1HF6hhy/it/u=1317686978,2345730812&fm=26&gp=0.jpg","tupian/laoshu.jpg");
26 DownLoader2 dl3=new DownLoader2("https://ss2.bdstatic.com/70cFvnSh_Q1YnxGkpoWK1HF6hhy/it/u=2531381064,3648016782&fm=26&gp=0.jpg","tupian/tiger.jpg");
27 Thread t1=new Thread(dl1);
28 Thread t2=new Thread(dl2);
29 Thread t3=new Thread(dl3);
30 t1.start();
31 t2.start();
32 t3.start();
33
34 }
35
36 }
