package com.gxy.Listener;

 import javax.servlet.http.HttpSessionAttributeListener;

 import javax.servlet.http.HttpSessionBindingEvent;

 public class sessionAttributeListener implements HttpSessionAttributeListener {

     public void attributeAdded(HttpSessionBindingEvent httpSessionBindingEvent) {

         // TODO Auto-generated method stub

         System.out.println("添加的属性名："+httpSessionBindingEvent.getName()+",添加的属性值"+httpSessionBindingEvent.getValue());

     }

     public void attributeRemoved(HttpSessionBindingEvent httpSessionBindingEvent) {

         // TODO Auto-generated method stub

         System.out.println("删除的属性名："+httpSessionBindingEvent.getName()+",删除的属性值"+httpSessionBindingEvent.getValue());

     }

     public void attributeReplaced(HttpSessionBindingEvent httpSessionBindingEvent) {

         // TODO Auto-generated method stub

         System.out.println("修改的属性名："+httpSessionBindingEvent.getName()+",修改的属性值"+httpSessionBindingEvent.getValue());

     }

 }

 <listener>

     <listener-class>com.gxy.Listener.sessionAttributeListener</listener-class>

 </listener>