userlistener.java

来自「JSP工程应用与实践」· Java 代码 · 共 42 行

package com.prolis;

import javax.servlet.http.HttpSessionBindingEvent;

/****************************************************
*类功能：	用户再线方案<br>
*****************************************************/
public class UserListener
	implements javax.servlet.http.HttpSessionBindingListener {

	private String user;
	private UserList container = UserList.getInstance();

	public UserListener(){
		user="";
	}

	/***************************************************
	*函数功能：设置在线监听人员<br>
	****************************************************/
	public void setUser(String user) {
		this.user = user;
	}

	/***************************************************
	*函数功能：获取在线监听<br>
	****************************************************/
	public String getUser() {
		return this.user;
	}

	public void valueBound(HttpSessionBindingEvent arg0) {
		System.out.println(user+" 用户上线");
		
	}

	public void valueUnbound(HttpSessionBindingEvent arg0) {
			container.removeUser(user);
		System.out.println(user+" 用户下线");
	}
}