Spring annotation and spring Annotation

Spring annotation and spring Annotation

Component Annotation

@ Controller: used to mark control layer components (control layer)

@ Service: used to mark Service layer components (Service layer)

@ Repository: used to mark the data access component, that is, the DAO component (persistence layer)

@ Component refers to the Component. It is not recommended for all common forms of Spring management components)

Injection Annotation

@ Resource automatic injection by byName (provided by J2EE: recommended to reduce the dependency on Spring)

@ Autowired automatic injection by byType if you want to configure the injection by name, use it with @ Qualifier (provided by Spring)