Spring Boot @Autowired cannot inject class consider defining a bean of type

Springboot Equipment The default rule is to scan from top to bottom according to the package location where the application class is located.

For example

Com.seed.controller
Com.seed.service
Com.seed.dao

If application under Com.seed.controller This package, you will not be able to scan the service DAO, so you can see a lot of blog write spring integration MyBatis under a package.

If you put application under Com.seed, you can scan to its sub-package service DAO

I've been stuck on this little problem for 3 hours. I'm so embarrassed ... I hope you will be the technology of friends to write blog when the flesh must try. Tell everyone about the pits.

Spring Boot @Autowired cannot inject class consider defining a bean of type