【java】<Jsoup>获取网页中的图片

 1 package asd;
 2 
 3 import java.io.File;
 4 import java.io.FileOutputStream;
 5 import java.io.IOException;
 6 import java.io.InputStream;
 7 import java.io.OutputStream;
 8 import java.net.URL;
 9 import java.net.URLConnection;
10 import java.util.ArrayList;
11 
12 import org.jsoup.Jsoup;
13 import org.jsoup.nodes.Document;
14 import org.jsoup.nodes.Element;
15 import org.jsoup.select.Elements;
16 
17 
18 public class DownLoadPic {
19 
20     private static final String saveImgPath="D://imgs";
21     //图片保存路径
22  
23     public void getDoc() throws IOException{
24         ArrayList<String> ar = new ArrayList<String>();
25         int n=0;
26         String s;
27         while(n<=19){
28             s="http://manhua.fzdm.com/22/636/index_"+n+".html";
29         Document doc = Jsoup.connect(s).get();
30         //获取后缀为png和jpg的图片的元素集合
31        Elements pngs=null;
32        pngs = doc.select("img[src~=(?i)\\.jpg]");
33        for(Element e : pngs){
34            
35            String src=e.attr("src");//获取img中的src路径
36            if(src.indexOf("http:")<0)
37                src="http:"+src;
38             ar.add(src);
39             break;
40        }
41        n++;
42         }
43         //遍历元素
44         int imageName=0;
45         for(String e : ar){
46             imageName=imageName+1;
47             System.out.print(e+"\n");
48             URL url = new URL(e);
49             URLConnection uri=url.openConnection();
50             //获取数据流
51             InputStream is=uri.getInputStream();
52             //写入数据流
53             OutputStream os = new FileOutputStream(new File(saveImgPath, imageName+".jpg"));
54             byte[] buf = new byte[1024];
55             int l=0;
56             while((l=is.read(buf))!=-1){
57                 os.write(buf, 0, l);
58                 os.flush();
59             }
60         }
61 
62 
63         }
64 
65 
66     public static void main(String[] args) throws IOException {
67         new DownLoadPic().getDoc(); //调用方法
68     }
69 }