Ibatis+Spring+webwork搭建框架所遇到的问题

问题：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userService' defined in class path resource [applicationContext-service-user.xml]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: sqlMapClient is required
Caused by: java.lang.IllegalArgumentException: sqlMapClient is required
我的配置 ：
<bean id=" sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
        <property name="configLocation" value="classpath:sql-map-config.xml"/>
        <property name="dataSource" ref="dataSource"/>
    </bean>
   
     <bean id="baseDao" class="com.tnt.ebr.sys.service.IbatisBaseDao">
        <property name="sqlMapClient"><ref local=" sqlMapClient"/></property>
    </bean>
    <bean id="userService" class="com.tnt.ebr.sys.service.impl.UserServiceImpl">
<property name="dao" ref=" baseDao"></property>
</bean>

IbatisBaseDao.java代码：
public class IbatisBaseDao extends SqlMapClientDaoSupport {
}
所要引用的代码：
public class UserServiceImpl extends SqlMapClientDaoSupport implements UserService {

protected IbatisBaseDao dao;


只要把extends SqlMapClientDaoSupport 去掉就OK了

问题待续中……