如何在Spring boot中将错误消息返回到输入页面？

@PostMapping("/submit")
public String submitForm(@Validated FormModel form, BindingResult bindingResult, Model model) {
    if (bindingResult.hasErrors()) {
        // 处理表单验证错误
        return "inputPage";
    }
    // 处理表单提交成功的逻辑
    return "successPage";
}

if (bindingResult.hasErrors()) {
    model.addAttribute("errors", bindingResult.getAllErrors());
    return "inputPage";
}

<div th:if="${errors}">
    <ul>
        <li th:each="error : ${errors}" th:text="${error.defaultMessage}"></li>
    </ul>
</div>