jsp javaBean

想问问怎么放置的，每次都运行都没有
代码如下：Counter.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<jsp:useBean id="counter" class="beans.Counter" scope="application">
</jsp:useBean>
<html>
<head>
<title>JavaBean 计数示例 </title>
</head>
<body>
<%
if(session.isNew())
{long tem=counter.getCounter();
counter.setCounter(temp);}
%>
<font size="2"><strong> 本页面展示的功能是利用JavaBean实现的计数器:</strong><br>
欢迎光临！你是本网站的第
<jsp:getProperty name="counter" property="counter"/>
个访客<br>
</font>
</body>
</html>
Counter.java
package beans;
public class Counter{
private long counter;
public long getCounter()
{return counter;
}

public void setCounter(long counter)
{
this.counter=counter+1;

}
}