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HTML形式の警告メッセージとしてSpringのカスタムクラス型注釈からこのメッセージを表示するにはどうすればいいですか？私はSpring Boot MVCとThymeleafを使用しています。 Thymeleafは、フォームの特定のフィールドに関連付けられていないフィールドエラーおよびグローバルエラーはまだ存在しますが、handleが可能です。このカスタム注釈でパスワードが一致しないことが判明した場合、このグローバルエラーまたはフィールドエラーはありますか？このメッセージを表示するにはどうすればよいですか？"パスワードが一致しません"というカスタム注釈メッセージを表示
カスタム注釈：
@Target({ TYPE, ANNOTATION_TYPE })
@Retention(RUNTIME)
@Constraint(validatedBy = PasswordMatchesValidator.class)
@Documented
public @interface PasswordMatches {
String message() default "Passwords don't match";
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
}
Validatorクラス：
public class PasswordMatchesValidator implements ConstraintValidator<PasswordMatches, Object> {
@Override
public void initialize(PasswordMatches passwordMatches) {
}
@Override
public boolean isValid(Object obj, ConstraintValidatorContext context){
UserDto userDto = (UserDto) obj;
return userDto.getPassword().equals(userDto.getMatchingPassword());
}
}
ポストコントローラー
@PostMapping(value = "/register")
public ModelAndView processRegistration(ModelAndView modelAndView, @Valid @ModelAttribute ("userDto") UserDto userDto,
BindingResult bindingResult, HttpServletRequest request, Errors errors){
// Lookup user in database by e-mail
User userExists = userService.findByEmail(userDto.getEmail());
System.out.println(userExists);
if (userExists != null) {
modelAndView.addObject("alreadyRegisteredMessage", "Oops! There is already a user registered with the email provided.");
modelAndView.setViewName("register");
bindingResult.reject("email");
}
if (bindingResult.hasErrors()) {
modelAndView.setViewName("register");
} else { // new user so we create user and send confirmation e-mail
User user = userService.createNewAccount(userDto);
user.setEnabled(false);
userService.saveUser(user);
modelAndView.addObject("confirmationMessage", "A confirmation e-mail has been sent to " + userDto.getEmail());
modelAndView.setViewName("registered");
}
HTMLフォーム：
<div class="container">
<div class="row">
<div class="card col-6 mx-auto" style="width: 20rem; margin: 20px;">
<div class="card-body">
<h4 class="card-title">Registration form:</h4>
<form th:action="@{register}" th:object="${userDto}" th:method="post" method="post" action="register">
<div class="form-group">
<label th:for="name" for="Name">Name</label>
<input type="text" class="form-control" th:field="*{name}" id="name" placeholder="Enter name">
<p class="text-danger" th:if="${#fields.hasErrors('name')}" th:errors="*{name}"></p>
</div>
<div class="form-group">
<label th:for="surname" for="Surname">Surname</label>
<input type="text" class="form-control" th:field="*{surname}" id="surname" placeholder="Enter surname">
<p class="text-danger" th:if="${#fields.hasErrors('surname')}" th:errors="*{surname}"></p>
</div>
<div class="form-group">
<label th:for="username" for="Username">Username</label>
<input type="text" class="form-control" th:field="*{username}" id="username" placeholder="Enter username">
<p class="text-danger" th:if="${#fields.hasErrors('username')}" th:errors="*{username}"></p>
</div>
<div class="form-group">
<label th:for="email" for="Email">Email address</label>
<input type="email" class="form-control" th:field="*{email}" id="email" aria-describedby="emailHelp" placeholder="Enter email">
<small id="emailHelp" class="form-text text-muted">We'll never share your email with anyone else.</small>
<p class="text-danger"th:if="${#fields.hasErrors('email')}" th:errors="*{email}"></p>
<p class="text-danger" th:text="${alreadyRegisteredMessage}"></p>
</div>
<div class="form-group">
<label th:for="password" for="Password">Password</label>
<input type="password" class="form-control" th:field="*{password}" id="password" placeholder="Password">
<p class="text-danger"th:if="${#fields.hasErrors('password')}" th:errors="*{password}"></p>
</div>
<div class="form-group">
<label th:for="matchingPassword" for="matchingPassword">Confirm Password</label>
<input type="password" class="form-control" th:field="*{matchingPassword}" id="matchingPassword" placeholder="Password">
<p class="text-danger"th:if="${#fields.hasErrors('matchingPassword')}" th:errors="*{matchingPassword}"></p>
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
</div>
</div>
</div>
</div>