一.首先我们要写一个javaBean类，我们可以通过此类计算用户停留的时间：
StopTime.java
package exa112;
import java.util.Date;
public class StopTime {
private int h=0;
private int m=0;
private int s=0;
public void conuttime(Date start)
{
Date end=new Date();//获得现在时间
long howmuch=end.getTime()-start.getTime();//将它和开始时间做差
h=(int)(howmuch/1000/60/60);//计算小时
howmuch=howmuch-h*60*60*1000;
m=(int)(howmuch/1000/60);//计算分钟
howmuch=howmuch-m*60*1000;
s=(int)(howmuch/1000);//计算秒
}
public int getH()
{
return h;
}
public int getM()
{
return m;
}
public int getS()
{
return s;
}
}
二.然后，写jsp文件显示：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@page import="java.util.*" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<jsp:useBean id="mycounttime" class="exa112.StopTime" scope="page"></jsp:useBean>
<%
session.setMaxInactiveInterval(11);
Date now=new Date();
if(session.isNew())
{
session.setAttribute("start",now);
}
else{
mycounttime.conuttime((Date)session.getAttribute("start"));
}
%>
<meta http-equiv="refresh" content="10">
<table>
<tr>
<td align="center">您登录的时间为：
<%=((Date)session.getAttribute("start")).toLocaleString()%>//将时间转换为字符串
</td>
</tr>
<tr>
<td>您在本页停留的时间为：<%=mycounttime.getH() %>小时<%=mycounttime.getM() %>分<%=mycounttime.getS() %>秒</td>
</tr>
</table>
</body>
</html>
结果：
