SpringBoot学习笔记十五、自定义Listener

最新推荐文章于 2024-08-13 20:41:40 发布

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ServletContextListener，上下文监听器，仅在spring容器启动和销毁的时候执行

package com.example.demo.listener;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;

@WebListener
public class MyServletContextListener implements ServletContextListener{

   @Override
   public void contextDestroyed(ServletContextEvent arg0) {
       System.out.println("MyServletContextListener.contextDestroyed()");
   }

   @Override
   public void contextInitialized(ServletContextEvent arg0) {
       System.out.println("MyServletContextListener.contextInitialized()");
   }

}

ServletRequestListener，每次接口请求前后都会执行对应的初始化及销毁

package com.example.demo.listener;

import javax.servlet.ServletRequestEvent;
import javax.servlet.ServletRequestListener;
import javax.servlet.annotation.WebListener;

@WebListener
public class MyServletRequestListener implements ServletRequestListener{

   @Override
   public void requestDestroyed(ServletRequestEvent arg0) {
       System.out.println("MyServletRequestListener.requestDestroyed()");
   }

   @Override
   public void requestInitialized(ServletRequestEvent arg0) {
       System.out.println("MyServletRequestListener.requestInitialized()");
   }

}