标签：
WEB容器监听器ServletContextListener主要用来监听容器启动和 销毁的时候需要做一些操作，就可以使用这个监听器来做。
ServletContextListener在Spring启动前启动。
我们实现一个简单的监听器，需要继承接口ServletContextListener：
* 一个测试的监听器例子
* @author zhuli
* @date 2014-7-26
*/
public class TestContextLister implements ServletContextListener {
@Override
public void contextInitialized(ServletContextEvent sce) {
System.out.println("==============================容器装载");
}
@Override
public void contextDestroyed(ServletContextEvent sce) {
System.out.println("==============================容器销毁");
}
}
ServletContextListener 实现两个接口，一个是容器启动的时候，一个是容器销毁的时候：
public interface ServletContextListener extends EventListener {
/**
** Notification that the web application initialization
** process is starting.
** All ServletContextListeners are notified of context
** initialization before any filter or servlet in the web
** application is initialized.
*/
public void contextInitialized ( ServletContextEvent sce );
/**
** Notification that the servlet context is about to be shut down.
** All servlets and filters have been destroy()ed before any
** ServletContextListeners are notified of context
** destruction.
*/
public void contextDestroyed ( ServletContextEvent sce );
}
在web.xml中的配置：
<listener>
<listener-class>com.xxx.controller.web.TestContextLister</listener-class>
</listener>
容器启动后，会在容器启动的日志中看到：
==============================容器装载
2014-07-26 08:54:01.302:INFO:/:Initializing Spring FrameworkServlet ‘apiServlet‘
Java深入 - WEB容器监听器详解 ServletContextListener
标签：
原文地址：http://my.oschina.net/u/1866821/blog/497254
