Question

我是Java新手。使用Thymeleaf和Spring-Boot。

尝试在错误的输入上显示验证消息。

＆＃34;电话＆＃34;属性必须在7到13个字符之间。如果不遵守规则，将显示验证消息。

请注意，验证有效，但未显示消息。

这是模型

@Entity
public class Author {

@Column(name = "phone")
@Size(min=7, max = 13, message = "The category name must be {min} to {max} characters in length.")
private String phone;
}

控制器

@Controller
@RequestMapping("/author")
public class AuthorController extends WebMvcConfigurerAdapter {

@Autowired
AuthorService authorService;

@Override
public void addViewControllers(ViewControllerRegistry registry) {
    registry.addViewController("/new-author").setViewName("newauthor");
}

@RequestMapping(value="/new-author", method = RequestMethod.GET)
public String newAuthor(Model model){

    Author author = new Author();
    model.addAttribute("addNewAuthor", author);

    return "newauthor";
}

@RequestMapping(value="/new-author", method = RequestMethod.POST)
public String newAuthor(@Valid  Author author, BindingResult bindingResult, Model model){

    model.addAttribute("addNewAuthor", author);

    if (bindingResult.hasErrors()) {
        return "newauthor";
    }

    try{

        authorService.createAuthor(author);
        model.addAttribute("statusReport", "Author Saved");
    }

    catch (Exception e){

        model.addAttribute("statusReport", "Author not Saved");
    }

    return "newauthor";
}
}

这是视图

<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>Add Author</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<link rel="stylesheet" href="../public/bootstrap-3.3.6-     dist/css/bootstrap.css" th:href="@{/bootstrap-3.3.6-dist/css/bootstrap.css}"/>

</head>
<body>
<h1>Add New Author</h1>
<div class="col-lg-3" >
<form role="form" action="#" th:action="@{/author/new-author}"  th:object="${addNewAuthor}" method="post">


<div th:class="form-group" th:classappend="${#fields.hasErrors('phone')}? 'has-error'">
    <label>Phone</label>
    <input class="form-control" type="text" th:field="*{phone}" placeholder="Enter author's phone number"/>
    <p th:if="${#fields.hasErrors('phone')}" class="label label-danger" th:errors="*{phone}">Phone Error</p>
</div>

<button type="submit" class="btn btn-default">Add</button>
<button type="reset" class="btn btn-default">Reset</button>

<p th:text="${statusReport}" > </p>
</form>
</div>
</body>
</html>

Answer 1

您的addNewAuthor应该有@ModelAttribute注释它应该是：

 public String newAuthor(
    @Valid @ModelAttribute("addNewAuthor") Author author, 
    BindingResult bindingResult, 
    Model model) {
    // ...
 }

Answer 2

我认为这样做更好，
首先，从message约束

中删除Size

   @Column(name = "phone")
   @Size(min=7, max = 13)
   private String phone;

其次，将消息添加到本地化文件（message.properties）。

Size.author.phone=The category name must be {1} to {2} characters in length.

另一种方式：

@Column(name = "phone")
@Size(min=7, max = 13, message="{phone.size}")
private String phone;

在message.properties：

phone.size=The category name must be {1} to {2} characters in length.

验证消息在Thymeleaf中无效

2 个答案: