我在Controller层里自动装配了serviceImpl实现类启动项目报错

Question

public interface TUserMapper extends BaseMapper<TUser> {

}

public interface TUserService extends IService<TUser> {
}

@Service
public class TUserServiceImpl extends ServiceImpl<TUserMapper, TUser> implements TUserService {
}

@RestController
public class TUserController {

    @Autowired
    private TUserServiceImpl userService;
}

我在Controller层里自动装配了serviceImpl实现类，启动就报错，跪qiu各位帮我解惑一下是什么原因

The bean 'TUserServiceImpl' could not be injected as a 'com.blog.service.impl.TUserServiceImpl' because it is a JDK dynamic proxy that implements:
com.blog.service.TUserService

Answer 1

@Autowired 就是按类型来装配的，这样写，它会自动帮你找到实现类，如果没有实现类会报错的，有多个也会报错的

@RestController
public class TUserController {
 
    @Autowired
    private TUserService userService;
}