`` vs. `` in Spring: When to Use Which?

Understanding and

activates annotations on beans already present in the application context, regardless of how they were defined, either through XML or package scanning.

, in addition to enabling annotations, also performs package scanning to find and register beans within the application context.

Similarities and Differences

• Both tags enable annotations in Spring beans.
• Both register the same bean post processors for annotation processing.

Exclusive Functionality

• performs package scanning to identify beans, while does not.

Usage Scenarios

• For beans defined solely through XML, is sufficient for enabling annotations.
• For beans discovered through package scanning, is necessary, as it combines both annotation activation and scanning.

Combining Both Tags

• While it is possible to use both tags simultaneously, it is generally not necessary, as can accomplish the functionality of .
• If is present, can be omitted.

Example Usage

Consider the following XML configuration:

<context:annotation-config />
<context:component-scan base-package="com.example" />
<bean>

In this example, activates annotations for the manually defined "myBean" bean, while scans the "com.example" package for annotated beans. Both and register the same bean post processors.

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