@RequestMapping: Spring MVC Request Mapping Annotation

'@RequestMapping' is an annotation in Spring MVC that is used to map a web request to a method in a controller. It is used to define the URL pattern for a particular controller or handler method. The '@RequestMapping' annotation can be used at the class level or the method level.

At the class level, it defines the base URL for all the request mappings in the controller. For example, if the class level '@RequestMapping' is set to '/users', all the methods in the controller will be mapped to URLs starting with '/users'.

At the method level, it defines the URL pattern for a specific method. For example, if the method level '@RequestMapping' is set to '/{id}', the method will handle requests with a URL that matches the pattern '/users/{id}'.

The '@RequestMapping' annotation supports various attributes such as method, produces, consumes, headers, params, and more. These attributes can be used to further specify the conditions under which a particular request mapping should be invoked.