Spring MVC <mvc:annotation-driven/> Tag: Enabling Annotation-Based Controllers

The mvc:annotation-driven/ tag is used in Spring MVC configuration files to enable support for handling requests with annotated controller methods. It enables the use of annotations like '@RequestMapping', '@PathVariable', '@RequestParam', etc., to define the behavior of the controllers.

When this tag is added to the configuration file, Spring MVC scans the classpath for annotated controllers and automatically configures the necessary components to handle the incoming requests. It sets up the necessary infrastructure for request mapping, request parameter binding, and response handling.

The mvc:annotation-driven/ tag also enables support for other features like data binding, validation, and message conversion. It configures default implementations for these features, but you can also customize them as per your requirements.

Overall, the mvc:annotation-driven/ tag simplifies the configuration process for Spring MVC applications and allows developers to focus on writing the business logic in annotated controller methods.