jsp&servlet——session监听

session监听，需要实现HttpSessionAttributeListener接口

attributeAdded：监听添加session

attributeRemoved：监听删除session

attributeReplaced：监听修改session

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());
    }

}

配置web.xml

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

运行结果