If the controller has an @Controller annotation, is this not enough for Spring without scanning components?

Question

According to Spring docs , to enable automatic detection of annotated controllers, you add component scanning to your configuration:

<context:component-scan base-package="org.springframework.samples.petclinic.web"/>

My question is: why is this necessary?

If the controller has an annotation to already indicate what it is, should this not be enough for Spring without scanning components?

Answer 1

How else can Spring find classes? Unless you told Spring to look in a specific class or package, these classes are not going to load, and Spring will never find them.

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Answer 2

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//EDIT//

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Answer 3

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