code: @Bean
      @ConditionalOnMissingBean(ISerializer.class)
      public ISerializer<Object> autoloadCacheSerializer() {
          ISerializer<Object> res;
          // 推荐优先使用：Hessian
          if (hessianPresent) {
              res = new HessianSerializer();
              log.debug("HessianSerializer auto-configured");
          } else if (kryoPresent) {
              res = new KryoSerializer();
              log.debug("KryoSerializer auto-configured");
          } else {
              res = new JdkSerializer();
              log.debug("JdkSerializer auto-configured");
          }
          return res;
      }
docs: * 序列化工具{@link ISerializer ISerializer} 注入规则：<br>
  如果导入了Hessian的jar包，优先使用Hessian：{@link HessianSerializer
  HessianSerializer},否则使用{@link JdkSerializer JdkSerializer}<br>
  
  @return