code: public static Config load(String filePath) {
          Config config = new Config();
          try (final InputStream stream = Config.class.getResourceAsStream(filePath)) {
              config.props.load(stream);
          } catch (Exception e) {
              throw new WeChatException("加载配置文件出错", e);
          }
          return config;
      }
docs: 加载 ClassPath 下的配置文件
  
  @param filePath
  @return