<?xml version="1.0" encoding="UTF-8"?>
<javaee:web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://Java.sun.com/xml/ns/javaee"
xmlns:javaee="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"metadata-complete="false" version="3.0"><javaee:display-name></javaee:display-name><javaee:welcome-file-list><javaee:welcome-file>index.html</javaee:welcome-file></javaee:welcome-file-list>
</javaee:web-app>

package com;import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;
@WebListener
public class MyServletContextListener implements ServletContextListener {@Overridepublic void contextDestroyed(ServletContextEvent sce) {System.out.println("MyServletContextListener销毁");}@Overridepublic void contextInitialized(ServletContextEvent sce) {System.out.println("MyServletContextListener初始化");System.out.println(sce.getServletContext().getServerInfo());}}

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;
import javax.servlet.http.HttpSessionAttributeListener;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;
import javax.servlet.http.HttpSessionBindingEvent;@WebListener()
public class Listener2 implements ServletContextListener,HttpSessionListener, HttpSessionAttributeListener {// Public constructor is required by servlet specpublic Listener2() {}// -------------------------------------------------------// ServletContextListener implementation// -------------------------------------------------------public void contextInitialized(ServletContextEvent sce) {/* This method is called when the servlet context isinitialized(when the Web application is deployed). You can initialize servlet context related data here.*/System.out.println("开始初始化");}public void contextDestroyed(ServletContextEvent sce) {/* This method is invoked when the Servlet Context (the Web application) is undeployed or Application Server shuts down.*/System.out.println("开始销毁");}// -------------------------------------------------------// HttpSessionListener implementation// -------------------------------------------------------public void sessionCreated(HttpSessionEvent se) {/* Session is created. */}public void sessionDestroyed(HttpSessionEvent se) {/* Session is destroyed. */}// -------------------------------------------------------// HttpSessionAttributeListener implementation// -------------------------------------------------------public void attributeAdded(HttpSessionBindingEvent sbe) {/* This method is called when an attribute is added to a session.*/}public void attributeRemoved(HttpSessionBindingEvent sbe) {/* This method is called when an attributeis removed from a session.*/}public void attributeReplaced(HttpSessionBindingEvent sbe) {/* This method is invoked when an attibuteis replaced in a session.*/}
}