本文实例讲述了jsp利用application统计在线人数的方法。分享给大家供大家参考。
具体实现方法如下：
复制代码 代码如下:
<%@ 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)//如果是第一个访问者
{
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">简单的页面访问计数器</font>
</p>
<p>
<font size="2" color="#000000">
欢迎访问此页面，您是<%=number%>个访问用户
</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)//如果是第一个访问者
{
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">简单的页面访问计数器</font>
</p>
<p>
<font size="2" color="#000000">
欢迎访问此页面，您是<%=number%>个访问用户
</font>
</p>
</body>
</html>
希望本文所述对大家的jsp程序设计有所帮助。
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