@Override
 public void onApplicationEvent(ContextRefreshedEvent event) {
   if (!SpringContextHolder.getContext().equals(event.getSource())) return;
   if (reloadAwares == null || reloadAwares.size() == 0) return;
   for (ReloadAware reloadAware : this.reloadAwares) {
     reloadAware.reload(); // 通知观察者
   }
 }