forumonlinecount.java

struts+hibernate BBS mysql数据库 功能基本齐全

package com.elan.forum.listener;

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

public class ForumOnlineCount implements HttpSessionListener {
	private static int count = 0;
	private static int high = 0;
	public synchronized void sessionCreated(HttpSessionEvent hse) {
		hse.getSession().getServletContext().setAttribute("FourmOnline", ++count);
		if(count > high ) {
			high = count;
		}
		System.out.println("有用户访问");
	}
	public synchronized void sessionDestroyed(HttpSessionEvent hse) {
		if(count > 0) {
			count--;
		}
		hse.getSession().getServletContext().setAttribute("FourmOnline", count);
		System.out.println("有用户退出");
	}
	
	public static int  getHigh() {
		return high;
	}
}