Spring Boot报错：Error starting ApplicationContext. To display the auto-configuration report re-run you

最近弄Spring Boot框架的时候出现了一个错误：

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2018-05-08 10:11:20.975 ERROR 11344 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

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APPLICATION FAILED TO START
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Description:

Cannot determine embedded database driver class for database type NONE

Action:

If you want an embedded database please put a supported one on the classpath. If you have database settings to be loaded from a particular profile you may need to active it (no profiles are currently active).


Process finished with exit code 1

上网上搜的几种方法也没有什么效果，反而出现新的错误
后来再仔细排查的时候发现，我的Controller包和Application包处于平行位置

但是实际上Controller包必须在Application包里才能被扫描到，从而正常运行程序，所以只要把Controller包移动到Application包内，错误就没有了