code: private static HttpURLConnection httpUrlConn(String url) throws IOException {
          URL urlObject = new URL(url);
          HttpURLConnection httpUrlConn = (HttpURLConnection) urlObject.openConnection();
          httpUrlConn.setConnectTimeout(Constant.DEFAULT_CONN_TIMEOUT);
          httpUrlConn.setReadTimeout(Constant.DEFAULT_READ_TIMEOUT);
          httpUrlConn.setUseCaches(false);
          httpUrlConn.setDoInput(true);
          return httpUrlConn;
      }
docs: 属性代码段