`` 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:

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

The above is the detailed content of `` vs. `` in Spring: When to Use Which?. For more information, please follow other related articles on the PHP Chinese website!