@EventListener
   public void handleContextClosedEvent(ContextClosedEvent event) {
       // todo 
   }

@Configuration
public class Listener implements ApplicationListener {
 @Override
 public void onApplicationEvent(ApplicationEvent event) {
   // 在这里可以监听到Spring Boot的生命周期
   if (event instanceof ContextRefreshedEvent) {
     System.out.println("应用刷新");
   }
   if (event instanceof ContextStartedEvent) {
     System.out.println("应用启动");

   } else if (event instanceof ContextStoppedEvent) {
     System.out.println("应用停止");

   } else if (event instanceof ContextClosedEvent) {
     System.out.println("应用关闭");
   }
 }
}