Error creating bean with name 'bookShopListImpl': Injection of autowired dependencies failed;

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Could not autowire field

 Error creating bean with name 'bookShopListImpl': Injection of autowired dependencies failed;

org.springframework.beans.factory.BeanCreationException: Could not autowire field:

private cn.com.dao.service.BookShopServiceImpl cn.com.dao.service.BookShopListImpl.bookShopServiceImpl;

java.lang.IllegalArgumentException: Can not set cn.com.dao.service.BookShopServiceImpl field

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错误代码：

1、BookShopDaoImpl 继承BookShopDao 接口

public class BookShopDaoImpl implements BookShopDao {

2、在自动装配的时候用的是BookShopDaoImpl 类型

    @Autowired
    private BookShopDaoImpl  bookShopDaoImpl;

正确代码：

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2、在自动装配的时候用的是BookShopDao 类型

    @Autowired
    private BookShopDao  bookShopDaoImpl;

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在许多的时候，子类继承接口的时候，默认的类型都是接口类型！！！