Consider defining a bean of type 'com.xxx.service.impl.xxxImpl' in your configuration

面向接口编程，把Service层定义为接口，然后用另外一个类去实现这个接口，使用spring boot启动时报错

项目结构：

controller层注入如下

@Autowired
private UserServiceImpl userService;

错误详情

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-09-30 10:06:33.611 ERROR 7736 --- [  restartedMain] o.s.b.d.LoggingFailureAnalysisReporter   : 

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APPLICATION FAILED TO START
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Description:

Field userService in com.adtec.vuespringboot.controller.UserController required a bean of type 'com.adtec.vuespringboot.service.impl.UserServiceImpl' that could not be found.


Action:

Consider defining a bean of type 'com.adtec.vuespringboot.service.impl.UserServiceImpl' in your configuration.

这可能是因为spring boot默认找的是service层的类，而Service里面并没有UserServiceImpl这个类

解决方案：

在UserServiceImpl类上添加注解@Service

@Service
public class UserServiceImpl implements UserService {