更新用户数据弹簧启动的最佳方法是什么？

Question

我无法以正确的方式成功更新用户数据，例如他的名字或姓氏

控制器：

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

    @RequestMapping(value = "/user/updateFirstName", method = RequestMethod.POST)
    public String changeUserFirstName(RedirectAttributes rm, final Locale locale, @Valid UserDto userDto) {
        final User user = (User) SecurityContextHolder.getContext()
            .getAuthentication()
            .getPrincipal();
        userService.changeUserFirstName(user, userDto.getFirstName());

        rm.addFlashAttribute(
            "message",
            messages.getMessage("message.updateFirstNameSuc", null, locale)
        );
        return "redirect:/user/myAccount?lang=" + locale.getLanguage();
    }
}

这就是myAccount html页面中相关的部分：

<div class="manageinfo">
   <h1>Manage your personal information</h1>
   <br/>
   <div class="container">
      <div th:if="${message != null}" class="alert alert-info" 
         th:text="${message}">message</div>
      <div th:each = "user: ${user}" >
         <p>Firstname</p>
         <input type="text" th:value="${user.firstName}"><a data-toggle="modal" 
            data-target="#myModalFirstName"><i class="fa fa-pencil fa-lg"> </i></a>
      </div>
      <!-- Modal for firstName-->
      <div class="modal fade" id="myModalFirstName" role="dialog">
         <button type="button" class="close" data-dismiss="modal">&times;</button>
         <form th:action="@{/user/updateFirstName}" th:method="POST">
            <p>First Name</p>
            <input type="text" name="firstName" required="required">
            <span id="firstNameError"  style="color:#F41F0E" ></span>     
            <button type="submit" class="btn btn-default" >Save</button>
         </form>
      </div>
   </div>
</div>

UserServiceImpl：

public void changeUserFirstName(final User user, final String firstname) {
    user.setFirstName(firstname);
    userRepository.save(user);   
}

当我尝试更改名称时，我会收到

Failed to resolve argument 2 of type Myproject.dto.UserDto
javax.validation.ValidationException: HV000028: Unexpected exception during isValid call

Answer 1

逻辑更新过程似乎还可以，我建议检查UserDto及其在其字段上的验证注释（@ NotNull，@ Size等。），因为isValid由控制器控制器的@Valid注释作为数据抛出没有遵循给定的约束。

例如，您的UserDTO可能包含：

@Size(max = 30)
private String firstName;
@Pattern(regexp = "....")
private String lastName;

但是您的控制器收到的FirstName的大小大于maximum / firstName的大小，且带有错误的模式。

另请阅读： https : //docs.oracle.com/javaee/7/api/javax/validation/ConstraintValidator.html#isV​​alid-T-javax.validation.ConstraintValidatorContext-