<%@ page import="java.net.CookieHandler" %><%--
Created by IntelliJ IDEA.
User: DELL
Date: 2018/4/19
Time: 17:06
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page import="java.net.*,java.util.*,java.io.*" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<%
//session
//獲取session創建的時間
Date createTime = new Date(session.getCreationTime());
//獲取最后訪問頁面的時間
Date lastAccessTime = new Date(session.getLastAccessedTime());
String title = "再次訪問";
Integer visitCount = new Integer(0);
String visitCountKey = new String("visitCount");
String userIDKey = new String("userID");
String userID = new String("ABCD");
// 檢測網頁是否由新的訪問用戶
if (session.isNew()) {
title = "訪問";
session.setAttribute(userIDKey, userID);
session.setAttribute(visitCountKey, visitCount);
} else {
visitCount = (Integer) session.getAttribute(visitCountKey);
visitCount += 1;
userID = (String) session.getAttribute(userIDKey);
session.setAttribute(visitCountKey, visitCount);
if (visitCount >= 2) {
// session.removeAttribute(userIDKey);
//銷毀session，清零;
session.invalidate();
}
}
%>
<h1>設置Cookie</h1>
<ul>
<li>名稱：<%= request.getParameter("userName")%>
</li>
<li>url:<%= request.getParameter("url")%>
</li>
</ul>
<h2>session</h2>
<table border="1" align="center">
<tr bgcolor="#949494">
<th>Session 信息</th>
<th>值</th>
</tr>
<tr>
<td>id</td>
<td><% out.print(session.getId()); %></td>
</tr>
<tr>
<td>創建時間</td>
<td><% out.print(createTime); %></td>
</tr>
<tr>
<td>最后訪問時間</td>
<td><% out.print(lastAccessTime); %></td>
</tr>
<tr>
<td>用戶 ID</td>
<td><% out.print(userID); %></td>
</tr>
<tr>
<td>訪問次數</td>
<td><% out.print(visitCount); %></td>
</tr>
</table>
<%--</script>--%>
</html>
在這里博主做了一個小小的判斷，當訪問次數大於等於2的時候，session會銷毀然后進行清零重新計算。