Struts2整合Hibernate3连接MySQL数据库，JSP查询不到结果：报错

今天做了一个Struts2整合Hibernate3连接MySQL数据库，但是部署上Tomcat6后，JSP查询不到结果只得到下面的结果

MySQL数据库正常，已经有了数据库，数据库表，字段内容，而且连接数据库的用户名和密码都是正确的。事实上不整合Struts2时,Hibernate连接MySQL数据库正常。

POJO类，action类，dao类，factory类，service类，还有hibernate工具类我都可以保证代码正常，因为我是照书打的，反复检查了不下三遍

hibernate.cfg.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
	<session-factory>
		<!-- 数据库连接URL -->
		<property name="connection.url">
			jdbc:mysql://localhost/mystruts2
		</property>
		
		<!-- 数据库连接驱动 -->
		<property name="connection.driver_class">
			com.mysql.jdbc.Driver
		</property>
		
		<!-- 数据库用户名 -->
		<property name="connection.username">root</property>
		
		<!-- 数据库用户密码 -->
		<property name="connection.password">lybcyy.</property>
		
		<!-- 数据库方言 -->
		<property name="dialect">
			org.hibernate.dialect.MySQLDialect
		</property>
		
		<mapping resource="Product.hbm.xml"/>
		
    </session-factory>
</hibernate-configuration>

Product.hbm.xml

<?xml version='1.0' encoding='UTF-8'?>  
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">  
<hibernate-mapping>  
 <!-- 每个class对应一个持久化对象 -->
 <class name="com.lyb.po.Product">
 <!-- id元素用来定义主键标示，并制定主键生成策略 -->
 <id name="id">
 <generator class="assigned"></generator>
 </id>
 
 <!-- 定义其他属性 -->
 <property name="name"></property>
 <property name="price"></property>
 </class>
</hibernate-mapping>

测试jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@taglib prefix="s" uri="/struts-tags" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>产品列表</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
    <center>
    	<h2>产品列表</h2>
    	<table border="1">
    		<tr>
    			<td>产品ID</td>
    			<td>产品名称</td>
    			<td>产品价格</td>
    			<td>是否删除</td>
    			<td>是否更新</td>
    		</tr>
    		<s:iterator value="#request.all" id="product">
    			<tr>
    				<td><s:property value="#product.id"/></td>
    				<td><s:property value="#product.name"/></td>
    				<td><s:property value="#product.price"/></td>
    				<td><a href="delete.action?id=<s:property value='#product.id'/>">删除</a></td>
    				<td><a href="update.jsp?id=<s:property value='#product.id'/>">更新</a></td>
    			</tr>
    		</s:iterator>
    	</table>
    	<a href="add.jsp">添加产品</a>
    </center>
  </body>
</html>

jar包