<context:annotation-config> is used to activate annotations in beans already registered in the application context (no matter if they were defined with XML or by package scanning).

What is the use of context annotation config?

<context:annotation-config> is used to activate annotations in beans already registered in the application context (no matter if they were defined with XML or by package scanning).

What is annotation based configuration?

What is Spring Annotation Based Configuration? In Spring Framework annotation-based configuration instead of using XML for describing the bean wiring, you have the choice to move the bean configuration into component class. It is done by using annotations on the relevant class, method or the field declaration.