testsessionlistener.java

一个视频网站的源码

package com.puckasoft.video312.test;

import javax.servlet.http.HttpSessionAttributeListener;
import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;

public class TestSessionListener implements HttpSessionAttributeListener,
		HttpSessionListener {
	public static int onLineUser = 0;
	public static int loginUser = 0;
	
	
	public void attributeAdded(HttpSessionBindingEvent event) {
		//当在session中创建"user"属性
		System.out.println("创建一个user");
		if("user".equals(event.getName())){
			TestSessionListener.loginUser++;
		}
		
	}

	public void attributeRemoved(HttpSessionBindingEvent event) {
		//退出：session.invalidate(), removeAttribute
		System.out.println("一个user退出");
		if("user".equals(event.getName())){
			TestSessionListener.loginUser--;
		}		
	}

	public void attributeReplaced(HttpSessionBindingEvent arg0) {
		// TODO Auto-generated method stub

	}

	public void sessionCreated(HttpSessionEvent arg0) {
		System.out.println("一个用户来访");
		TestSessionListener.onLineUser++;
	}

	public void sessionDestroyed(HttpSessionEvent arg0) {
		System.out.println("一个用户退出");
		TestSessionListener.onLineUser--;
	}

}