Wicket：如何覆盖子类的 onSubmit 方法？

如何解决Wicket：如何覆盖子类的 onSubmit 方法？

我有一个超类 A 和子类 B。超类 A 有一个表单和 onSubmit 方法。我想在子类上覆盖该表单方法。如何实现这一目标？

示例 A

form.add(new AjaxFormSubmitBehavior(form,"onsubmit") {
        @Override
        protected void onSubmit(AjaxRequestTarget target) {
            super.onSubmit(target);

            if (errorsList == null) errorsList = new ArrayList<>();
            prepareFormValuesForSubmit();
            PaymentsValidator.debtInfoIsValid(model.getobject(),errorsList);

            if (!errorsList.isEmpty()) {
                for (String error : errorsList)
                    error(error);

                JavascriptUtils.showMessagesForFeedbackPanel(target,Feedback);
                return;
            }

            Long id = sendPayment(target);
            getoBSession().setAttribute((Object) DebtInfoViewPage.PAGE_ParaMETER,id);
            JavascriptUtils.goToPage(target,Constants.DEBTINFO_BASE_URL + "/" + DebtInfoViewPage.class.getSimpleName());

            getoBSession().setSaveDoc(false);
        }

在 B 上：

getPaymentForm().add(new AjaxFormSubmitBehavior(getPaymentForm(),"onSubmit") {

        @Override
        protected void onSubmit(AjaxRequestTarget target) {
            List<String> errors = new ArrayList<>();
            PaymentsValidator.auditStatementIsValid(auditorsContactModel.getobject(),errors);
            if (errors.size() == 0) {
                auditorsContactModel.getobject().setDebtInfoId(getDebtInfoModel().getobject().getId());
                ServiceLocator.getService(DocumentService.class).persist(auditorsContactModel.getobject());
            }
        }
    });

这种方式行不通，好像是在添加另一个 onSubmit。

解决方法

您需要在 A.java 中创建 onSubmit(Form<?> form,AjaxRequestTarget target) 并委托给它：

A.java:

 form.add(new AjaxFormSubmitBehavior(form,"onsubmit") {
    @Override
    protected void onSubmit(AjaxRequestTarget target) {
        super.onSubmit(target);
        /*A.this.*/onSubmit(form,target);
    }
});

protected void onSubmit(Form<?> form,AjaxRequestTarget target) {
        if (errorsList == null) errorsList = new ArrayList<>();
        prepareFormValuesForSubmit();
        PaymentsValidator.debtInfoIsValid(model.getObject(),errorsList);

        if (!errorsList.isEmpty()) {
            for (String error : errorsList)
                error(error);

            JavascriptUtils.showMessagesForFeedbackPanel(target,feedback);
            return;
        }

        Long id = sendPayment(target);
        getOBSession().setAttribute((Object) DebtInfoViewPage.PAGE_PARAMETER,id);
        JavascriptUtils.goToPage(target,Constants.DEBTINFO_BASE_URL + "/" + DebtInfoViewPage.class.getSimpleName());

        getOBSession().setSaveDoc(false);
    }

B.java:

 @Override void onSubmit(Form<?> form,AjaxRequestTarget target) { {
   List<String> errors = new ArrayList<>();
        PaymentsValidator.auditStatementIsValid(auditorsContactModel.getObject(),errors);
        if (errors.size() == 0) {
            auditorsContactModel.getObject().setDebtInfoId(getDebtInfoModel().getObject().getId());
            ServiceLocator.getService(DocumentService.class).persist(auditorsContactModel.getObject());
        }
 }