docs: public <T> T getJsonData(Class<T> clazz, RemoteUrl remoteUrl, int retryTimes, int retrySleepSeconds)
              throws Exception {
          Exception ex = null;
          for (URL url : remoteUrl.getUrls()) {
  
              // 可重试的下载
              UnreliableInterface unreliableImpl = new RestfulGet<T>(clazz, url);
  
              try {
  
                  T t = retryStrategy.retry(unreliableImpl, retryTimes, retrySleepSeconds);
  
                  return t;
  
              } catch (Exception e) {
                  ex = e;
                  try {
                      Thread.sleep(1000);
                  } catch (InterruptedException e1) {
                      LOGGER.info("pass");
                  }
              }
          }
  
          throw new Exception("cannot get: " + remoteUrl, ex);
      }