Java bean name'；的BindingResult或普通目标对象；电话簿'；可用作请求属性

我试图将验证添加到电话号码输入中，但在访问索引时我一直在解决这个错误

错误消息

原因：org.attoparser.ParseException:执行时出错 加工机 'org.thymeleaf.spring5.processor.SpringInputGeneralFieldTagProcessor' （模板：“索引”-第76行，第73列）

原因：java.lang.IllegalStateException:既不是BindingResult也不是 bean名称“phonenumber”的普通目标对象可作为请求使用 属性

index.html

 <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>

电话簿

     @Entity
        @Table(name = "Phonebook")
        public class Phonebook {

            @Id
            @GeneratedValue(strategy = GenerationType.AUTO)
            @Column(name = "id")
            private Integer id;
            @NotNull
            @Size(max=15, message = "Max symbols is 15")
            @Column(name = "phonenumber", length = 15, nullable = false)
            private String phonenumber;
            @Column(name = "surname", length = 50, nullable = false)
            private String surname;
            @Column(name = "firstname", length = 50, nullable = false)
            private String firstname;

//getters and setter

---

我有两种方法来解决这个问题：——

1.）使用@RequestParam获取电话簿对象，如下所示：——

或者——使用@modeldattribute获取表单的值，如下所示：--

1.）创建新的电话簿对象和外接程序模型属性：-

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

---

4.）最后是使用getter和setter方法的Phonebook类。

您在Phonebook中定义了phonenumber属性了吗class@GauravSrivastav是的，您可以检查代码您的解决方案修复了旧错误，但生成了一个新的org.attoparser.ParseException:（Line=52，Column=13）结构不完整：“您是否正确地用标记关闭了表单？@Ekera您在

”${phonebook}

@chelmertz之后缺少了一个

“

”，但它会导致以前描述的错误above@Sumit是的，关门了

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

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

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

            //your code 

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

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

// your code

</form>

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

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