我正在使用@controlleradvice，但是id不起作用，我不知道为什么。它是@controlleradvice:

@ControllerAdvice
public class MainControllerAdvice {
    private final static Logger log = LoggerFactory.getLogger(MainControllerAdvice.class);

    @ExceptionHandler(value = DataNotFoundException.class)
    public String handleNotFound(){
        return "not-found";
    }
}

自定义异常：

@ResponseStatus(value= HttpStatus.NOT_FOUND, reason="No such data")
public class DataNotFoundException extends RuntimeException {
    public DataNotFoundException() {
        super();
    }
}

和控制器：

@GetMapping(value = "/details/{id}")
public String details(@PathVariable Integer id, Model model) throws DataNotFoundException {
    Pupil pupil = pupilService.get(id);
    if (pupil == null) {
        throw new DataNotFoundException();
    }
    model.addAttribute("pupil", pupil);
    return "details";
}

我做错了什么？