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：

	<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'