聊聊spring继承的问题

<bean id="sysActionService" class="com.service.impy.SysActionServiceImpy" parent="baseService" >    
      <property name="sysActionDao" ref="sysActionDao" />    
  </bean>   

package com.jeremy.spring.genericityDI;
public class BaseRepository{
}

package com.jeremy.spring.genericityDI;
import org.springframework.beans.factory.annotation.Autowired;
public class BaseService<T> {    
    @Autowired------//这里告诉ioc容器自动装配有依赖关系的Bean
    protected BaseRepository baseRepository;--------//这里是子类继承依赖关系
    public void add(){
        System.out.println("add..............");
        System.out.println(baseRepository);
    }
}

package com.jeremy.spring.genericityDI;
public class User {
}

package com.jeremy.spring.genericityDI;
import org.springframework.stereotype.Component;
@Component
public class UserRepository extends BaseRepository{    
}

package com.jeremy.spring.genericityDI;
import org.springframework.stereotype.Service;
@Service
public class UserService extends BaseService{
}

<?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:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
<context:component-scan base-package="com.jeremy.spring.genericityDI"></context:component-scan>
</beans>

@Test
    public void test() {
        ApplicationContext actx=new ClassPathXmlApplicationContext("Bean-genericity-di.xml");
        UserService userService=(UserService) actx.getBean("userService");
        userService.add();
    }