Question

关于spring mvc 3.0注解，注入失败的问题

使用注解注入失败：
--dao层
interface LoginUserDao（接口）
public class LoginUserDaoImpl implements LoginUserDao（实现类）

--service层
interface LoginUserService（接口）
//使用注解注入dao层对象
@Service
public class LoginUserServiceImpl implements LoginUserService{
@Resource(type=LoginUserDao.class,name="loginUserDaoImpl")
private LoginUserDao loginUserDaoImpl;
//方法...
}
--controller
//使用注解注入service层对象
@Controller
@RequestMapping("/userlogin.do")
public class UserLoginController{
@Resource(type=LoginUserService.class,name="loginUserServiceImpl")
private LoginUserService loginUserServiceImpl;
//方法...
}

启动错误：
Error creating bean with name 'loginUserServiceImpl':Injection of resource dependencies failed;No bean named 'loginUserDaoImpl' is defined
No bean named 'loginUserDaoImpl' is defined；
Error creating bean with name 'loginUserServiceImpl': Injection of resource dependencies failed;
No bean named 'loginUserDaoImpl' is defined

Answer 1

import org.springframework.stereotype.Repository;
@Repository
public class LoginUserDaoImpl implements LoginUserDao（实现类）

加上@Repository注解给 LoginUserDaoImpl

Answer 2

你dao层没有注解啊,在在dao层的实现类上注解@repository就可以了