WEB容器的侦听器ServletContextListener主要用于监测容器启动和 当破坏需要做一些操作，听众将能够使用此做。

ServletContextListener在Spring开始，然后再开始。

们实现一个简单的监听器，须要继承接口ServletContextListener：

* 一个測试的监听器样例 * @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：

     		
      
       com.xxx.controller.web.TestContextLister
      	
     

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'

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