Question

我正在使用spring security和thymeleaf在spring boot中进行注册，但出于某种原因，userForm.getUsername()在POST期间给出了null值（参见下面的代码）

Person.java

@Entity
@Table(name="person")
public class Person {

@Id
@Column(name="username")
private String username;

@Column(name="mobile")
private String mobile;

@JsonIgnore
@Column(name="password")
private String password;

@Transient
@JsonIgnore
private String passwordConfirm;

@ManyToMany(cascade = CascadeType.ALL)
@JoinTable(name="bookandperson",
    joinColumns=@JoinColumn(name="username"),
    inverseJoinColumns=@JoinColumn(name="bookName"))
private List<Book> listOfBooks = new ArrayList<Book>();

PersonController.java

@Controller
public class PersonController {
    @Autowired
    private UserService userService;

@Autowired
private SecurityService securityService;

@Autowired
private UserValidator userValidator;

@RequestMapping(value = "/registration", method = RequestMethod.GET)
public String registration(Model model, Principal user) {
    if (user != null) {
        return "redirect:/";
    }
    model.addAttribute("userForm", new Person());

    return "registration";
}

@RequestMapping(value = "/registration", method = RequestMethod.POST)
public String registration(@ModelAttribute Person userForm, BindingResult bindingResult, Model model) {
    System.out.println(userForm.getUsername()); //This is giving null value
    userValidator.validate(userForm, bindingResult);

    if (bindingResult.hasErrors()) {
        System.out.println("binding result has errors");
        return "registration";
    }

    userService.save(userForm);

    securityService.autologin(userForm.getUsername(), userForm.getPasswordConfirm());

    return "redirect:/";
}

registration.html

<head>
    <link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
</head>

<body>

    <nav th:replace="common/navbar :: common-navbar"/>

    <div class="container mt-4">
    <div class="row justify-content-center">
    <div class="col-md-6 col-md-offset-6">
    <form th:action="@{/registration}" method="post">
      <div class="form-group row">
        <label for="inputUsername" class="col-sm-2 col-form-label">Username</label>
        <div class="col-md-6">
            <input type="text" class="form-control" th:field="${userForm.username}" id="inputUsername" value="" placeholder="Username">
        </div>
      </div>
      <div class="form-group row">
        <label for="mobile" class="col-sm-2 col-form-label">Mobile</label>
        <div class="col-md-6">
            <input type="text" class="form-control" th:field="${userForm.mobile}" id="inputMobile" placeholder="Mobile">
        </div>
      </div>
      <div class="form-group row">
        <label for="inputPassword" class="col-sm-2 col-form-label">Password</label>
        <div class="col-md-6">
            <input type="password" class="form-control" th:field="${userForm.password}" id="inputPassword" placeholder="Password">
        </div>
      </div>
      <div class="form-group row">
        <label for="inputPasswordConfirm" class="col-sm-2 col-form-label">Confirm Password</label>
        <div class="col-md-6">
            <input type="password" class="form-control" th:field="${userForm.passwordConfirm}" id="inputPasswordConfirm" placeholder="Password">
        </div>
      </div>
      <div class="form-group row">
       <div class="offset-2 col-sm-10">
        <button type="submit" th:name="${_csrf.parameterName}" th:value="${_csrf.token}" class="btn btn-primary">Submit</button>
       </div>
       </div>

       <small th:text="${error}"></small>
    </form>
    </div>
    </div>
    </div>

    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
</body>

我使用th:field="${userForm.username}"正确绑定但无法找到问题所在。

Answer 1

您必须将模型对象转换为以下形式

<form action="#" th:action="@{/registration}" th:object="${userForm}" method="post">

并将获取器和设置器添加到Person类中

无法正确绑定百里叶模板和弹簧靴

1 个答案: