public class UserRegistrationForm {
private String username;
private String password;
private String email;
}
@Target({ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = PasswordValidator.class)
public @interface Password {
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
}
public class PasswordValidator implements ConstraintValidator<Password, String> {
@Override
public boolean isValid(String value, ConstraintValidatorContext context) {
return value.matches("^(?=.*[a-zA-Z])(?=.*\\d).+$");
}
}
public class UserRegistrationForm {
// ...
@Password
private String password;
// ...
}
@RestControllerAdvice
public class GlobalExceptionHandler {
@ExceptionHandler(ConstraintViolationException.class)
public ResponseEntity<Object> handleConstraintViolation(
ConstraintViolationException ex, WebRequest request) {
List<String> errors = ex.getConstraintViolations().stream()
.map(v -> v.getPropertyPath() + ": " + v.getMessage())
.collect(Collectors.toList());
return new ResponseEntity<>(errorDto, HttpStatus.BAD_REQUEST);
}
}
