code: private static CloseableHttpClient wrapClient(String host) {
  
          CloseableHttpClient httpClient = HttpClientBuilder.create().build();
  
          if (host.startsWith("https://")) {
              httpClient = sslClient();
          }
  
          return httpClient;
      }
docs: 创建HttpClient
  @param host 服务器地址
  @return HttpClient，支持Http/Https