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servlet context listener

发表于:2024-11-24 作者:热门IT资讯网编辑
编辑最后更新 2024年11月24日,ServletContextListener@WebListenerpublic class ServletContextListenerDemo implements ServletContextL

ServletContextListener

@WebListenerpublic class ServletContextListenerDemo implements ServletContextListener{    @Override    public void contextInitialized(ServletContextEvent servletContextEvent) {    }    @Override    public void contextDestroyed(ServletContextEvent servletContextEvent) {    }}

ServletContextAttributeListener

@WebListenerpublic class ServletContextAttributeListenerDemo implements ServletContextAttributeListener {    @Override    public void attributeAdded(ServletContextAttributeEvent servletContextAttributeEvent) {    }    @Override    public void attributeRemoved(ServletContextAttributeEvent servletContextAttributeEvent) {    }    @Override    public void attributeReplaced(ServletContextAttributeEvent servletContextAttributeEvent) {    }}

说明:servletContext上下文监听器,是整个应用在启动的时候加载的context.一个web application只会有一个context.因此,servletContext是对整个appliction全程有效的。

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