我目前正在使用 Hibernate 和 Spring MVC 進行一些 HTML 表單驗證。我已經對 Enity 應用了一些驗證并將代碼添加到我的控制器中。將包含格式不正確數據的表單提交給控制器時，將顯示錯誤頁面頁面 (500)。但是，我希望將表單返回給用戶，并在不正確的字段附近顯示錯誤消息。實體代碼： @NotNull(message="Please enter a product")    @Column(name="product_name")    private String productName;    @NotNull(message="Please enter a product code")    @Pattern(regexp="([A-Z]{2,4})-([0-9]{5})|", message="Incorrect format")    @Column(name="product_code")    private String productCode;控制器代碼：    @GetMapping("/showFormForAdd")public String showFormForAdd(Model theModel) {    // create model attribute to bind form data    QaRaised theProduct = new QaRaised();    theModel.addAttribute("product", theProduct);    return "product-form";}@PostMapping("/saveProduct")public String saveProduct(@Valid @ModelAttribute("product") QaRaised theProduct, BindingResult bindingResult) {    qaRaisedService.saveProduct(theProduct);    if (bindingResult.hasErrors()) {        return "product-form";    }    return "redirect:/products/qaraised";}來自錯誤的堆棧跟蹤：    org.springframework.web.util.NestedServletException: Request processing failed; nested exception is javax.validation.ConstraintViolationException: Validation failed for classes [com.sonya.spring.entity.QaRaised] during persist time for groups [javax.validation.groups.Default, ]List of constraint violations:[ConstraintViolationImpl{interpolatedMessage='Incorrect format', propertyPath=productCode, rootBeanClass=class com.sonya.spring.entity.QaRaised, messageTemplate='Incorrect format'}表格代碼：  <div class="form-group"><label for="InputPC">Product Code:</label><form:input required="true" type="text"  title="Product Code" path="productCode" class="form-control" id="productCodeInput" placeholder="Enter Product Code" commandName="productCode"/><form:errors path="productCode"/>這里的驗證工作正常，我只是想將用戶重定向回表單。誰能看到我遺漏的任何東西或為我指明正確的方向？