Java-HttpSession监听

//HttpSession监听public interface HttpSessionActivationListener extends EventListener {     /** Notification that the session is about to be passivated.*///session无效监听    public void sessionWillPassivate(HttpSessionEvent se);     /** Notification that the session has just been activated.*/    //session有效监听    public void sessionDidActivate(HttpSessionEvent se);} 

//session 属性监听public interface HttpSessionAttributeListener extends EventListener {/** Notification that an attribute has been added to a session. Called after the attribute is added.*///属性增加监听    public void attributeAdded ( HttpSessionBindingEvent se );/** Notification that an attribute has been removed from a session. Called after the attribute is removed. */    //属性删除监听    public void attributeRemoved ( HttpSessionBindingEvent se );/** Notification that an attribute has been replaced in a session. Called after the attribute is replaced. */    //属性替换监听    public void attributeReplaced ( HttpSessionBindingEvent se );}