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<context:component-scan base-package="packageA" />

Does this instantiate all beans defined in packageA.*(base package and sub-packages) ?

Ajay Sabarish
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2 Answers2

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If your question is "does it apply to subpackages automatically", then the answer is yes.

Beans in the base package and sub packages will be found by Spring when using component-scan or @ComponentScan.

Gaël J
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Spring will search every class within this package.

No, it will not instantiate the beans, but by component-scan you are telling your spring application about the packages where it should search for Components and Beans.

You can verify this by declaring beans in packageA.subpackage1.* and packageA.subpackage2.*

but put

<context:component-scan base-package="packageA.subpackage1" />

put some logging in your beans and you won't see any logs coming from bean methods declared in packageA.subpackage2.* package.

Utsav10
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    I think your answer is slightly confusing: `component-scan` itself isn't responsible to instantiate beans but it will lead to beans of the packages and subpackages being instantiated if needed. – Gaël J Nov 15 '21 at 20:42