SHH框架，bean报错问题
HTTP Status 500 - 

--------------------------------------------

type Exception report

message 

description The server encountered an internal error () that prevented it from fulfilling this request.

exception 

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userService' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type [com.shh.dao.impl.UserTestDAO] to required type [com.shh.dao.IUserDAO] for property 'userDAO'; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type [com.shh.dao.impl.UserTestDAO] to required type [com.shh.dao.IUserDAO] for property 'userDAO': no matching editors or conversion strategy found

.......

applicationContext.xml代码：[color=#FF0000][/color]

<?xml version="1.0" encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">


<bean name="userService" class="com.shh.service.impl.UserService">
<property name="userDAO">
<ref bean="UserTestDAO"/>
</property>
</bean>
<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName"
value="oracle.jdbc.driver.OracleDriver">
</property>
<property name="url"
value="jdbc:oracle:thin:@localhost:1521:moon">
</property>
<property name="username" value="scott"></property>
<property name="password" value="tiger"></property>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource">
<ref bean="dataSource" />
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
org.hibernate.dialect.Oracle9Dialect
</prop>
</props>
</property>
<property name="mappingResources">
<list>
<value>com/shh/user/UserTest.hbm.xml</value></list>
</property></bean>
<bean id="UserTestDAO" class="com.shh.dao.impl.UserTestDAO">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean></beans>

web.xml代码：[color=#FF0000][/color]

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" v