What effect does executing controller methods have in the Spring framework?

In Spring Framework, controller methods annotated with annotations like @RequestMapping, @GetMapping, etc., handle HTTP requests.

• They parse incoming request parameters and bind them to method parameters.
• They execute the business logic described in the method.
• They return a result, which Spring converts into an HTTP response (for example, in JSON, HTML, or redirect).

Thus, the execution of controller methods is responsible for processing requests and forming responses to the client in a Spring web application.

Example:

@RestController
public class MyController {
    @GetMapping("/hello")
    public String sayHello() {
        return "Hello, world!";
    }
}