URL 访问与返回

        String sUrl = "http://www.sina.com";
        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);
            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;
          }
        }