使用SSH框架时，找不到sessionFactory

在使用SSH框架的时候，运行时遇到这么一个错：Property 'sessionFactory' is required
我猜测是配置有问题，但不知道错在哪。
异常信息：
Messages: Property 'sessionFactory' is required
File: org/springframework/orm/hibernate3/HibernateAccessor.java
Line number: 314

Eclipse下 Struts2.3 + Spring3.0 + Hibernate3.6 ，这是导入的jar包：


applicationContext.xml文件

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"  

       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  

       xsi:schemaLocation="http://www.springframework.org/schema/beans   

                           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">



	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">

		<property name="driverClass" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"/>

		<property name="jdbcUrl" value="jdbc:sqlserver://localhost:1433;databaseName=test"></property>

		<property name="user" value="sa"></property>

		<property name="password" value="123"></property>

	</bean>

	<!-- Hibernate sessionFactory创建 -->

	<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

		<property name="dataSource" ref="dataSource"></property>

		<!-- Hibernate属性 -->

		<property name="hibernateProperties">

			<props>

			<prop key="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</prop>

			<prop key="hibernate.show_sql">true</prop> 

			</props>

		</property>

		<!-- 映射文件 -->

		<property name="mappingResources">

		<list>

                  <value>../User.hbm.xml</value>

                </list>

        </property>

	</bean>

	

	<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">

		<constructor-arg>

			<ref local="sessionFactory" />

		</constructor-arg>

	</bean>

    <bean id="transactionManager"

            class="org.springframework.orm.hibernate3.HibernateTransactionManager">

    	<property name="sessionFactory" ref="sessionFactory"/>

    </bean>

    <bean id="userDao" class="com.test.dao.impl.UserDaoImpl" scope="prototype">

        <property name="sessionFactory" ref="sessionFactory"></property>

    </bean>

    <bean id="registerAction" class="com.test.actions.RegisterAction" scope="prototype">

        <property name="ud" ref="userDao"></property>

    </bean>

</beans>

UserDaoImpl.java

package com.test.dao.impl;



import org.hibernate.SessionFactory;

import org.springframework.orm.hibernate3.HibernateTemplate;



import com.test.entity.vo.User;

import com.test.interfaces.UserDao;



public class UserDaoImpl implements UserDao{



	private HibernateTemplate hibernateTemplate = null;

	private SessionFactory sessionFactory ;

	

	public SessionFactory getSessionFactory() {

		return sessionFactory;

	}



	public void setSessionFactory(SessionFactory sessionFactory) {

		this.sessionFactory = sessionFactory;

	}



	public HibernateTemplate getHibernateTemplate() {

		if(hibernateTemplate == null){

			hibernateTemplate = new HibernateTemplate(sessionFactory);

		}

		return hibernateTemplate;

	}

	

	@Override

	public Long addUser(User user) {

		// TODO Auto-generated method stub

		return (Long)getHibernateTemplate().save(user);

	}

}

RegisterAction.java

package com.test.actions;



import com.opensymphony.xwork2.ActionSupport;

import com.test.dao.impl.UserDaoImpl;

import com.test.entity.vo.User;

import com.test.interfaces.UserDao;



public class RegisterAction extends ActionSupport{

	/**

	 * 

	 */

	private static final long serialVersionUID = 1L;

	private String username;

	private String password;

	private UserDao ud = new UserDaoImpl();

	

	public String getUsername() {

		return username;

	}

	public void setUsername(String username) {

		this.username = username;

	}

	public String getPassword() {

		return password;

	}

	public void setPassword(String password) {

		this.password = password;

	}

	public UserDao getUd() {

		return ud;

	}

	public void setUd(UserDao ud) {

		this.ud = ud;

	}

	

	public String execute() throws Exception{

		User user = new User();

		user.setUsername(username);

		user.setPassword(password);

		ud.addUser(user);

		return SUCCESS;

	}

}