Question

我试图在电话号码输入中添加验证，但我坚持解决访问索引时的错误。

错误消息

由以下原因引起：org.attoparser.ParseException：执行期间出错   处理器   'org.thymeleaf.spring5.processor.SpringInputGeneralFieldTagProcessor'   （模板：“索引”-第76行，第73行）

由于：java.lang.IllegalStateException：既没有BindingResult也没有   Bean名称“ phonenumber”的简单目标对象可作为请求提供   属性

index.html

控制器

电话簿

 <div class="myForm">
            <form th:action="@{/save}"  method="post" th:object="${phonebook}">
            <div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
                <div class="modal-dialog" role="document">
                    <div class="modal-content">
                        <div class="modal-header">
                            <h5 class="modal-title" id="exampleModalLabel">Update or Create</h5>
                            <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                                <span aria-hidden="true">&times;</span>
                            </button>
                        </div>
                        <div class="modal-body">
                            <div class="form-group">
                                <input type="hidden" class="form-control" id="id" name="id" value=""/>
                            </div>
                            <div class="form-group">
                                <label for="surname" class="col-form-label">Surname:</label>
                                <input type="text" class="form-control" id="surname" name="surname" value=""/>
                            </div>
                            <div class="form-group">
                                <label for="firstname" class="col-form-label">First Name:</label>
                                <input type="text" class="form-control" id="firstname" name="firstname" value=""/>
                            </div>
                            <div class="form-group">
                                <label for="phonenumber" class="col-form-label">Phone Number:</label>
                                <input type="text" class="form-control" th:field="*{phonenumber}" id="phonenumber" name="phonenumber" value=""/>
                                <span th:if="${#fields.hasErrors('phonenumber')}" class="help-block" th:errors="*{phonenumber}"></span>
                            </div>

                        </div>
                        <div class="modal-footer">
                            <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
                            <input type="submit" class="btn btn-primary" value="Save"/>
                        </div>
                    </div>
                </div>
            </div>
        </form>

Answer 1

我有2种方法可以解决此问题：-

1。）使用@RequestParam获得像这样的电话簿对象：-

@PostMapping("/save")
public String save(@Valid @RequestParam("phonenumber")String phonenumber, BindingResult bindingResult) {

    if (bindingResult.hasErrors()) {
        return "redirect:/";
    }else {
        phonebookRepository.save(p);
    }
    return "redirect:/";
}

OR-使用@ModelAttribute来获取表单的值，就像这样：-

1。）创建一个新的Phonebook对象并添加model属性：-

     @RequestMapping(value = {"/"}, method = RequestMethod.GET)
        public String showPage(Model model, @RequestParam(defaultValue = "0") int page) {

            //your code 

            model.addAttribute("phoneBook", new Phonebook());
            return "index";
        }

2。）Thymeleaf / HTML页面中的更改（提交后使用 th：object 发送电话簿对象）：-

<form th:action="@{/save}"  method="post" th:object="${phoneBook}">

// your code

</form>

3。）然后使用@ModelAttribute绑定这样的值：-

@PostMapping("/save")
public String save(@Valid @ModelAttribute("phoneBook")Phonebook p, BindingResult bindingResult) {

    if (bindingResult.hasErrors()) {
        return "redirect:/";
    }else {
        phonebookRepository.save(p);
    }
    return "redirect:/";
}

4。）最后是使用getter和setter方法的Phonebook类。

Bean名称“电话簿”的BindingResult和普通目标对象都不能用作请求属性

1 个答案: