Handle error 404 with Spring controller

Question

I use @ExceptionHandler to handle exceptions thrown by my web app, in my case my app returns JSON response with HTTP status for error

Answer 1

public final class ResourceNotFoundException extends RuntimeException {

}


@ControllerAdvice
public class AppExceptionHandler {
    @ExceptionHandler(ResourceNotFoundException.class)
    @ResponseStatus(HttpStatus.NOT_FOUND)
    public String handleNotFound() {
        return "404";
    }
}

Just define an Exception, an ExceptionHandler, throw the Exception from your business code controller.