In Spring Boot, "Delete Mapping" is an annotation used to handle HTTP DELETE requests in web applications. It allows you to create endpoints in your Spring Boot application that handle the deletion of specific resources on the server.

The HTTP DELETE method is used to request the removal of a resource identified by the given URL. When a client sends a DELETE request to a specific endpoint, the server should process the request and delete the corresponding resource.

To implement a DELETE endpoint in Spring Boot, you can use the @DeleteMapping annotation. Here's an example:

import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class UserController {

    // Endpoint to delete a user by ID using DELETE method
    @DeleteMapping("/users/{id}")
    public ResponseEntity<String> deleteUser(@PathVariable Long id) {
        // Delete the user with the specified ID from the database or perform other operations
        // ...

        // Return a response indicating success (HTTP status 204 - No Content)
        return ResponseEntity.status(HttpStatus.NO_CONTENT).body("User deleted successfully");
    }
}

In the example above, the deleteUser method is annotated with @DeleteMapping("/users/{id}"), which means it will handle HTTP DELETE requests to the "/users/{id}" endpoint. The @PathVariable annotation is used to extract the "id" parameter from the URL, allowing you to identify the resource to delete.

When a client sends a DELETE request to "/users/123" (for example), Spring Boot will invoke the deleteUser method, passing the value "123" as the id parameter. Inside the method, you can process the request and delete the user with ID 123 from the database or perform any other necessary actions.

It's important to note that DELETE requests should be used carefully, as they permanently remove resources from the server. Therefore, proper authorization and authentication mechanisms should be implemented to prevent unauthorized deletions.

By using the @DeleteMapping annotation, you can create clean and intuitive APIs in your Spring Boot application to handle resource deletions effectively.