Question

当我在数据库中插入新数据时，它不应小于要验证的当前日期。我该如何找到正确的RegEx？

@FutureOrPresent
@Pattern(message = "Invalid date", regexp = "?")
private Date dataInserted;

Answer 1

您可以在PresentOrFuture.java中引入新的注释：

    @Target({ ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER })
    @Retention(RetentionPolicy.RUNTIME)
    @Constraint(validatedBy = PresentOrFutureValidator.class)
    @Documented
    public @interface PresentOrFuture {
        String message() default "{PresentOrFuture.message}";
        Class<?>[] groups() default {};
        Class<? extends Payload>[] payload() default {};
    }

然后，您必须在PresentOrFutureValidator.java中定义验证器：

    public class PresentOrFutureValidator
        implements ConstraintValidator<PresentOrFuture, Date> {

        public final void initialize(final PresentOrFuture annotation) {}

        public final boolean isValid(final Date value,
            final ConstraintValidatorContext context) {

            // Only use the date for comparison
            Calendar calendar = Calendar.getInstance(); 
            calendar.set(Calendar.HOUR_OF_DAY, 0);
            calendar.set(Calendar.MINUTE, 0);
            calendar.set(Calendar.SECOND, 0);

            Date today = calendar.getTime();

            // Your date must be after today or today (== not before today)
            return !value.before(today) || value.after(today);

        }
    }

然后您必须设置：

    @NotNull
    @PresentOrFuture
    @DateTimeFormat(pattern = "dd/MM/yyyy")
    @Temporal(TemporalType.DATE)
    private Date startDate;

插入不小于当前日期验证的数据

1 个答案: