java url 访问网站代码

   String sUrl = "http://www.sina.com.cn";
        HttpURLConnection conn =null;
        try{
           conn =(HttpURLConnection)new URL(sUrl).openConnection();
          int result= conn.getResponseCode();
          String re=conn.getResponseMessage();  
          if(result==HttpURLConnection.HTTP_OK){
            System.out.println(re);
            InputStream in=conn.getInputStream();
            byte[] b=new byte[1024];
            while(in.read(b)>0)
            System.out.write(b);
            System.out.println("连接成功！");
          }else{
             System.out.println("连接不成功！");
          }
        }catch(Exception e ){
           e.printStackTrace();
        }finally{
          if(conn!=null){
             conn.disconnect();
             conn = null;
          }
        }