如何编写通用方法

Question

我有很多控制器。所有这些都扩展了AbstractController。许多控制器实现了验证方法。 如何在AbstractController中编写通用验证方法？

public class CarSearchCriteria extends AbstractController {
    ...

    public static final String VALIDATE = "/validate";
    private static final String TEMPLATE_PATH = "car/car_search";
    private static final String EMPTY_RESULT = " :: div-car-search";
    private static final String RESULT = " :: div-car-search-result";
    private static final String SEARCH_CRITERA = "carSearchCriteria";


    @RequestMapping(value = VALIDATE, method = RequestMethod.POST)
    public String validate(@Valid @ModelAttribute(SEARCH_CRITERA) CarSearchCriteria criteria, final BindingResult bindingResult,
            Model model) {
        if (bindingResult.hasErrors()) {
            return TEMPLATE_PATH + EMPTY_RESULT;
        }
        return TEMPLATE_PATH + RESULT;
    }

    ...
}

public abstract class AbstractController {
    ...
}