【Java EE 学习 21 上】【其它类型的监听器】【使用HttpSessionActivationListener监听session的活化和钝化】

一、ServletContextListener 

Method Summary
void	contextDestroyed(ServletContextEvent sce)           Receives notification that the ServletContext is about to be shut down.
void	contextInitialized(ServletContextEvent sce)           Receives notification that the web application initialization process is starting.

代码举例：

package com.kdyzm.listener;

import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

public class MyServletContextListener implements ServletContextListener{

    @Override
    public void contextDestroyed(ServletContextEvent sce) {
        ServletContext sc=sce.getServletContext();
        System.out.println(sc+"被销毁！");
    }

    @Override
    public void contextInitialized(ServletContextEvent sce) {
        System.out.println(sce.getServletContext()+"初始化！");
    }
    
}

ServletContextListener举例