【java】<Jsoup>获取网页中的图片

要做Android课程设计了，做一个爬漫画的东东练一下手

package asd;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;


public class DownLoadPic {

    private static final String saveImgPath="D://imgs";
    //图片保存路径
 
    public void getDoc() throws IOException{
        ArrayList<String> ar = new ArrayList<String>();
        int n=0;
        String s;
        while(n<=19){
            s="http://manhua.fzdm.com/22/636/index_"+n+".html";
        Document doc = Jsoup.connect(s).get();
        //获取后缀为png和jpg的图片的元素集合
       Elements pngs=null;
       pngs = doc.select("img[src~=(?i)\.jpg]");
       for(Element e : pngs){
           
           String src=e.attr("src");//获取img中的src路径
           if(src.indexOf("http:")<0)
               src="http:"+src;
            ar.add(src);
            break;
       }
       n++;
        }
        //遍历元素
        int imageName=0;
        for(String e : ar){
            imageName=imageName+1;
            System.out.print(e+"
");
            URL url = new URL(e);
            URLConnection uri=url.openConnection();
            //获取数据流
            InputStream is=uri.getInputStream();
            //写入数据流
            OutputStream os = new FileOutputStream(new File(saveImgPath, imageName+".jpg"));
            byte[] buf = new byte[1024];
            int l=0;
            while((l=is.read(buf))!=-1){
                os.write(buf, 0, l);
                os.flush();
            }
        }


        }


    public static void main(String[] args) throws IOException {
        new DownLoadPic().getDoc(); //调用方法
    }
}