怎样用java获取URL返回状态码

//  用getResponseCode可以获取URL返回状态码
String surl = "";
try {
	       surl="你的url";
               URL url = new URL(surl);
               URLConnection rulConnection   = url.openConnection();
               HttpURLConnection httpUrlConnection  =  (HttpURLConnection) rulConnection;
               httpUrlConnection.setConnectTimeout(300000);
               httpUrlConnection.setReadTimeout(300000);
               httpUrlConnection.connect();
               String code = new Integer(httpUrlConnection.getResponseCode()).toString();
               String message = httpUrlConnection.getResponseMessage();
               System.out.println("getResponseCode code ="+ code);
               System.out.println("getResponseMessage message ="+ message);
               if(!code.startsWith("2")){
                    throw new Exception("ResponseCode is not begin with 2,code="+code);
               }
               System.out.println(getCurDateTime()+"连接"+surl+"正常");
          }catch(Exception ex){
               System.out.println(ex.getMessage());
          }