java从网页中提取图片地址

import java.util.regex.Matcher;
import java.util.regex.Pattern;
1：这个是拿到一个字符取得里面的图像地址返回一个List 
public static List<String> getImgStr(String htmlStr){     
         String img="";     
         Pattern p_image;     
         Matcher m_image;     
         List<String> pics = new ArrayList<String>();  
     
         String regEx_img = "<img.*src=(.*?)[^>]*?>"; //图片链接地址     
         p_image = Pattern.compile   
                 (regEx_img,Pattern.CASE_INSENSITIVE);     
        m_image = p_image.matcher(htmlStr);   
        while(m_image.find()){     
             img = img + "," + m_image.group();     
             Matcher m  = Pattern.compile("src=\"?(.*?)(\"|>|\\s+)").matcher(img); //匹配src  
             while(m.find()){  
                pics.add(m.group(1));  
             }  
         }