在Spring项目中使用@ModelAttribute时发生SpringInputGeneralFieldAttrProcessor

Question

我正在尝试使用表单更新用户名。问题是，当我使用@modelattribute时，我会得到以下错误：

帐户控制器类：

@Controller
public class AccountController {

    @Autowired
    private UserService userService;

    @GetMapping("/account")
    public ModelAndView adminPage(){
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.setViewName("account");
        //modelAndView.addObject("users", userService.getAllUsers());
        return modelAndView;
    }


    @PutMapping("/renameUsername")
    public ModelAndView renameUserName(@ModelAttribute("user") User newUserName) {
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        String currentUser = auth.getName();
        userService.changeUsername(currentUser, newUserName);
        return new ModelAndView("account");
    }

模型用户类：

@Entity
@AllArgsConstructor
@NoArgsConstructor
@Getter
@Setter
@ToString
public class User {
    @Id
    private String logonName;
    private String firstName;
    private String lastName;
    @JsonIgnore
    private String password;
    private String recoveryQuestion;
    @JsonIgnore
    private String recoveryAnswer;

}

负责用户名更改的用户服务方式：

public  void changeUsername(String oldUserName, User newUserName) {
    User user = userRepository.findOne(oldUserName);
    user.setLogonName(newUserName.getLogonName());
    userRepository.save(user);
}

<div class="jumbotron">
  <form th:action="@{/renameUsername}" th:method="put" th:object="${user}">
    <dl class="row">
      <dt class="col-sm-5">
<p>Change username:</p>
<p class="description">Enter your username, which you will use to login</p>
</dt>
      <dd class="col-sm-7">
        <p>
          <label for="inputUser" class="sr-only">username</label>
          <input type="text" id="inputUser" class="form-control" name="logonName" th:field="*{logonName}" placeholder="Username" />
        </p>
        <p>
          <button type="submit" class="btn btn-sm btn-warning">Update username</button>a
        </p>
      </dd>
    </dl>
  </form>
</div>

Answer 1

在您的代码中/modelandview.addobject（“users”,userservice.getallusers())；。但在您的视图中

:

将用户更改为用户。