我想实现以下功能：如果用户写“错误”的pid，警报应该显示为：你真的用无效格式保存这个pid吗？如果用户说是，那么整个“playermber”（如果其他字段是正确的）将被保存到数据库中（即使pid的格式不正确），那么我该如何实现呢？我想补充一点 @Patern(with right regex) and message -由于下面的模板，此消息将显示给用户，但如何添加此类对话框（是-使用无效pid保存表单，否-不保存它）。使用Spring Boot和百里香叶。
控制器中的方法

@PostMapping("/create")
    public String createPlayer(@Valid @ModelAttribute("playerForm") PlayerForm playerForm,
                               BindingResult bindingResult,
                               Model model,
                               RedirectAttributes redirectAttributes) {
        // Check for errors
        if (bindingResult.hasErrors()) {
            formViewPreparer.prepare(model, new PlayerFormViewPreparer.ParamObj(true, null));

            return "admin/players/create";
        }
        // Prepare object for service layer
        CreatePlayerIn createPlayerIn = CreatePlayerInMapper.fromPlayerForm(playerForm);
        // Call service layer
        playerService.createPlayer(createPlayerIn);
        redirectAttributes.addFlashAttribute("message", "player.toast.created");

        return "redirect:/admin/players";
    }

球员形态类

@Getter
@Setter
public class PlayerForm {

    @NotBlank
    private String firstName;
    @NotBlank
    private String lastName;
    @NotNull
    private GenericState playerState;
    @DateTimeFormat(pattern = "yyyy-MM-dd")
    private LocalDate birthDate;
    private String PID;
    private Long schoolId;
    private Long teamId;
    private String street;
    private String city;
    private String zipCode;
    private String phoneNumber;
    private String email;
    private String motherPhoneNumber;
    private String motherEmail;
    private String fatherPhoneNumber;
    private String fatherEmail;
    @DateTimeFormat(pattern = "yyyy-MM-dd")
    private LocalDate validityOfMedicalExam;
    @NumberFormat(style = NumberFormat.Style.NUMBER)
    @Min(0)
    private Integer annualFee;
    private String annualFeeNote;
    @NumberFormat(style = NumberFormat.Style.NUMBER)
    @Min(0)
    private Integer firstSemiAnnualFee;
    private String firstSemiAnnualFeeNote;
    @NumberFormat(style = NumberFormat.Style.NUMBER)
    @Min(0)
    private Integer secondSemiAnnualFee;
    private String secondSemiAnnualFeeNote;

创建.html模板

<form th:object="${playerForm}"
          th:action="@{/admin/players/create}"
          novalidate
          enctype="multipart/form-data"
          method="post">
<div class="form-group col-md-6">
                                <input type="text" th:field="*{PID}" class="form-control" th:errorclass="is-invalid"
                                       th:placeholder="#{player.input.PID}"/>
                                <label for="PID" th:text="#{player.input.PID}" class="form-control-placeholder"></label>
                                <div th:if="${#fields.hasErrors('PID')}" class="invalid-feedback"
                                     th:errors="*{PID}"></div>
                            </div>