正则表达式 抓取网页面上所有图片

<!--<br /> <br /> Code highlighting produced by Actipro CodeHighlighter (freeware)<br /> http://www.CodeHighlighter.com/<br /> <br /> --> package  com.roadway.test;

import  java.io.InputStream;
import  java.net.HttpURLConnection;
import  java.net.URL;
import  java.util.regex.Matcher;
import  java.util.regex.Pattern;

public   class  TeskSRC {
     public  String getHtmlCode(String httpUrl) {
        String htmlCode  =   "" ;
         try  {
            InputStream in;
            URL url  =   new  java.net.URL(httpUrl);
            HttpURLConnection connection  =  (HttpURLConnection) url
                    .openConnection();
            connection  =  (HttpURLConnection) url.openConnection();
            connection.setRequestProperty( " User-Agent " ,  " Mozilla/4.0 " );
            connection.connect();
            in  =  connection.getInputStream();
             byte [] buffer  =   new   byte [ 512 ];
             int  length  =   - 1 ;
             while ((length  =  in.read(buffer, 0 , 512 ))  !=   - 1 ){
                htmlCode  +=   new  String(buffer, 0 ,length);
            }
        }  catch  (Exception e) {
        }
         if (htmlCode  ==   null ){
             return   "" ;
        }
         return  htmlCode;
    }
     public   static   void  main(String[] args){
        TeskSRC ts  =   new  TeskSRC();
        String searchImgReg  =   " (?x)(src|SRC|background|BACKGROUND)=('|\ " )(http: // ([\\w-]+\\.)+[\\w-]+(:[0-9]+)*(/[\\w-]+)*(/[\\w-]+\\.(jpg|JPG|png|PNG|gif|GIF)))('|\")";
        String content  =  ts.getHtmlCode( " http://www.163.com " );
        Pattern pattern  =  Pattern.compile(searchImgReg);
        Matcher matcher  =  pattern.matcher(content);
         while (matcher.find()){
            System.out.println(matcher.group( 3 ));
        }
         // searchImgReg  = "(?x)(src|SRC|background|BACKGROUND)=('|\")/?(([\\w-]+/)*([\\w-]+\\.(jpg|JPG|png|PNG|gif|GIF)))('|\")";
    }
}