本文實(shí)例講述了jsp利用application統(tǒng)計(jì)在線人數(shù)的方法。分享給大家供大家參考。
具體實(shí)現(xiàn)方法如下：
復(fù)制代碼代碼如下:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>application</title>
</head>
<body>
<%!
Integer number;//
synchronized void numberVisiter()
{
ServletContext application = getServletContext();
Integer num = (Integer)application.getAttribute("count");
if(num == null)//如果是第一個(gè)訪問(wèn)者
{
num = new Integer(1);
application.setAttribute("count",num);
}
else
{
num = new Integer(num.intValue() + 1);
application.setAttribute("count",num);
}
}
%>
<%
if(session.isNew())
{
numberVisiter();
Integer number = (Integer)application.getAttribute("count");
}
%>
<p>
<font size="2" color="blue">簡(jiǎn)單的頁(yè)面訪問(wèn)計(jì)數(shù)器</font>
</p>
<p>
<font size="2" color="#000000">
歡迎訪問(wèn)此頁(yè)面，您是<%=number%>個(gè)訪問(wèn)用戶
</font>
</p>
</body>
</html>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>application</title>
</head>
<body>
<%!
Integer number;//
synchronized void numberVisiter()
{
ServletContext application = getServletContext();
Integer num = (Integer)application.getAttribute("count");
if(num == null)//如果是第一個(gè)訪問(wèn)者
{
num = new Integer(1);
application.setAttribute("count",num);
}
else
{
num = new Integer(num.intValue() + 1);
application.setAttribute("count",num);
}
}
%>
<%
if(session.isNew())
{
numberVisiter();
Integer number = (Integer)application.getAttribute("count");
}
%>
<p>
<font size="2" color="blue">簡(jiǎn)單的頁(yè)面訪問(wèn)計(jì)數(shù)器</font>
</p>
<p>
<font size="2" color="#000000">
歡迎訪問(wèn)此頁(yè)面，您是<%=number%>個(gè)訪問(wèn)用戶
</font>
</p>
</body>
</html>
希望本文所述對(duì)大家的jsp程序設(shè)計(jì)有所幫助。
