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  • session的使用

    <%@ page language="java" contentType="text/html; charset=UTF-8"
        pageEncoding="UTF-8"%>
    <%@ page import="java.io.*,java.util.*" %>
    <%
       // 获取session创建时间
       Date createTime = new Date(session.getCreationTime());
       // 获取最后访问页面的时间
       Date lastAccessTime = new Date(session.getLastAccessedTime());
    
       String title = "再次访问菜鸟教程实例";
       Integer visitCount = new Integer(0);
       String visitCountKey = new String("visitCount");
       String userIDKey = new String("userID");
       String userID = new String("ABCD");
    
       // 检测网页是否有新的访问用户
       if (session.isNew()){
          title = "访问菜鸟教程实例";
          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);
       }
    %>
    <html>
    <head>
    <title>Session 跟踪</title>
    </head>
    <body>
    
    <h1>Session 跟踪</h1>
    
    <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>创建时间</td>
       <td><% out.print(createTime); %></td>
    </tr> 
    <tr>
       <td>最后访问时间</td>
       <td><% out.print(lastAccessTime); %></td>
    </tr> 
    <tr>
       <td>用户 ID</td>
       <td><% out.print(userID); %></td>
    </tr> 
    <tr>
       <td>访问次数</td>
       <td><% out.print(visitCount); %></td>
    </tr> 
    </table> 
    </body>
    </html>

     引自:https://www.runoob.com/jsp/jsp-session.html

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  • 原文地址:https://www.cnblogs.com/jz-no-bug/p/14229977.html
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