whycrzg
2021-05-21 e4cd7fd3e48a5280d15cfbf07ca5e1e18b4f74d0
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//package com.yckj.listener;
//
//import com.yckj.dto.UserClient;
//
//import javax.servlet.http.HttpSession;
//import javax.servlet.http.HttpSessionEvent;
//import javax.servlet.http.HttpSessionListener;
//import java.util.Map;
//
//public class Sessionlister implements HttpSessionListener {
//
//    public void sessionCreated(HttpSessionEvent event) {
//        //System.out.println("session被创建");
//    }
//
//    public void sessionDestroyed(HttpSessionEvent event) {
//        //System.out.println("session被销毁");
//        HttpSession session=event.getSession();
//        String ip=(String)session.getAttribute("ip");
//        Map<String,UserClient> map=(Map)session.getServletContext().getAttribute("users");
//        if(map!=null){
//            if(map.get(ip)!=null){
//                map.remove(ip);
//            }
//        }
//    }
//}