The server encountered an internal error () that prevented it from fulfilling th

首先是一个bean包下的CounterBean，代码如下：package bean;import java.io.Serializable;public class CounterBean implements Serializable {
/**
 * 
 */
private static final long serialVersionUID = 1L;
int count = 0; public CounterBean() { } public int getCount() {
count++;
return count;
} public void setCount(int count) {
this.count = count;
}}然后是testBean.jsp页面的代码<%@ page language="java" import="java.util.*," pageEncoding="UTF-8"%>
<%@ page import="bean.*"%>
<jsp:useBean id="cb" class="bean.CounterBean"></jsp:useBean><jsp:setProperty name="cb" property="Count" value="2" /><%-- 上面这句话等价于：cb.setCount(2)--%><jsp:getProerty name="cb" property="Count" /><%-- 上面这句话等价于：out.print(cb.getCount())--%>
http://localhost:8080/jspGrammar/bean/testBean.jsp后,就报错了！
报错裁图：