Question

我正在尝试使用spring和Thymeleaf执行表单验证，但是当导航到表单URL时，我收到以下错误：

出现意外错误（type = Internal Server Error，状态= 500）。执行处理器时出错 'org.thymeleaf.spring5.processor.SpringInputGeneralFieldTagProcessor' （模板：“create-store-form” - 第18行，第28栏）

控制器

@RequestMapping(value="/createStoreForm.html")
public ModelAndView getCreateStoreForm() {
    ModelAndView modelAndView = new ModelAndView("create-store-form");
    return modelAndView;
}

@RequestMapping(value="/submitNewStoreForm" , method = RequestMethod.POST)
public ModelAndView submitNewStoreForm(@Valid @ModelAttribute("newStore") Store store, BindingResult bindingResult, HttpSession httpSession, Principal principal) {
    String loggedInUsername = principal.getName();
    User loggedInUser = userService.findUser(loggedInUsername);
    ModelAndView modelAndView;
    if(bindingResult.hasErrors()) {
        modelAndView = new ModelAndView("create-store-form");
        return modelAndView;
    }       
    try {
        store.setSellerName(loggedInUser.getUsername());
        storeService.saveStore(store);
    }catch (Exception e) {
        modelAndView = new ModelAndView("create-store-form");
        System.out.println("User '"+store.getName()+"' already exist on db.");
        bindingResult.addError(new ObjectError("dup", "* Store '"+store.getName()+"' already exist!"));
        return modelAndView;
    }
    modelAndView = new ModelAndView("store-page");
    modelAndView.addObject("storeName", store.getName());

    return modelAndView;

}

HTML

<div class="row">

    <form action="#" th:action="@{/submitNewStoreForm}" th:object="${newStore}" method="post">
    <table>
        <tr>
            <td>Name:</td>
            <td><input type="text" th:field="*{name}" /></td>
            <td th:if="${#fields.hasErrors('name')}" th:errors="*{name}">Title error message</td>
        </tr>
        <tr>
            <td>Image Link:</td>
            <td><input type="text" th:field="*{imageLink}" /></td>
            <td th:if="${#fields.hasErrors('imageLink')}" th:errors="*{imageLink}">Content error message</td>
        </tr>
        <tr>
            <td><button type="submit">Submit post</button></td>
        </tr>
    </table>
</form>


</div>

我做错了什么？我跟着this guide。

Answer 1

可能会出现此错误的原因有多种。

首先尝试以下操作：在getCreateStoreForm()中，替换

... = new ModelAndView("create-store-form”);

... with：

... = new ModelAndView("create-store-form”, “newStore”, new Store());

"create-store-form” = html表单视图名称
“newStore” =对象名称（th：thymeleaf中的对象）
new Store() =对模型对象的引用

如果有效，请告诉我。如果没有，请发布完整的堆栈跟踪和Store的类。

尝试使用spring和thymeleaf执行表单验证时出错

1 个答案: