java 根据URL获取网页源码

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;

public class webPageResource {

 /**
  * @param args
  */
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  webPageResource t6=new webPageResource();
  String htmls= t6.getPageSource("http://www.no5.com.cn/browse/specialprice_p2.html","GBK");
  System.out.println(htmls);
 }
 
 public String getPageSource(String pageUrl,String encoding) { 
        StringBuffer sb = new StringBuffer(); 
        try { 
            //构建一URL对象 
            URL url = new URL(pageUrl); 
            //使用openStream得到一输入流并由此构造一个BufferedReader对象 
            BufferedReader in = new BufferedReader(new InputStreamReader(url 
                    .openStream(), encoding)); 
            String line; 
            //读取www资源 
            while ((line = in.readLine()) != null) { 
                sb.append(line); 
                sb.append("\n");
            } 
            in.close(); 
        } catch (Exception ex) { 
            System.err.println(ex); 
        } 
        return sb.toString(); 
    }

}