java 使用 Hibernate 验证日期
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Validation of a date with Hibernate
提问by Kendall H.
We have an existing hotel management system. I was asked to add a date validation in the "Create Accommodation" function in the system. The dialog looks like this:
我们有一个现有的酒店管理系统。我被要求在系统的“创建住宿”功能中添加日期验证。该对话框如下所示：
The "End Date" is already validated as shown in the code below. The @Futureannotation in Hibernate ensures that the date is in the future.
“结束日期”已经过验证，如下面的代码所示。@FutureHibernate 中的注解确保日期在未来。
@NotNull
@Future
@DateTimeFormat(pattern = "dd/MM/yyyy")
@Temporal(TemporalType.DATE)
private Date endDate;
EDIT
编辑
I was asked to add a validation to the "Start date". Only the present or a future date is allowed. I tried to use a @Presentannotation, but I guess there is no such thing. Unfortunately, @Futuredoes not accept today's date. I am new to this kind of thing. So I hope someone can help me. Thank you.
我被要求向“开始日期”添加验证。只允许现在或将来的日期。我尝试使用@Present注释，但我想没有这样的东西。不幸的是，@Future不接受今天的日期。我对这种事情很陌生。所以我希望有人可以帮助我。谢谢你。
回答by thatguy
Hibernate
休眠
You can use
您可以使用
@CreationTimestamp
@Temporal(TemporalType.DATE)
@Column(name = "create_date")
private Date startDate;
or on update
或在更新
@UpdateTimestamp
@Temporal(TemporalType.TIMESTAMP)
@Column(name = "modify_date")
private Date startDate;
Java (JPA)
爪哇 (JPA)
You can define a field Date startDate;and use
您可以定义一个字段Date startDate;并使用
@PrePersist
protected void onCreateStartDate() {
startDate = new Date();
or on update
或在更新
@PreUpdate
protected void onUpdateStartDate() {
startDate = new Date();
Update and example
更新和示例
After you have updated your question to not fix the start date to the present, you have to do a different approach. You need to write a custom validator to check if a date is now or in the future, like here.
在您更新问题以不将开始日期固定为当前之后，您必须采用不同的方法。您需要编写一个自定义验证器来检查日期是现在还是将来，就像这里。
Therefore you can introduce a new annotation in PresentOrFuture.java:
因此，您可以在 中引入新的注释PresentOrFuture.java：
@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 {};
}
Then you have to define the validator in PresentOrFutureValidator.java:
然后你必须定义验证器PresentOrFutureValidator.java：
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);
}
}
Then you have to set:
然后你必须设置：
@NotNull
@PresentOrFuture
@DateTimeFormat(pattern = "dd/MM/yyyy")
@Temporal(TemporalType.DATE)
private Date startDate;
Well, that was exhausive. I have not tested it myself, since I do not have a set-up to do so now, but it should work. I hope it helps.
嗯，那是详尽无遗的。我自己没有测试过，因为我现在没有这样做的设置，但它应该可以工作。我希望它有帮助。
回答by Ankit Bhatnagar
Now, in the updated new validator version i.e.
现在，在更新的新验证器版本中，即
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>6.0.4.Final</version>
</dependency>
via
通过
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>2.0.0.Final</version>
</dependency>
we have @FutureOrPresent and many other helpful annotations that you can use.
我们有@FutureOrPresent 和许多其他有用的注释供您使用。
回答by JoB?N
The easiest way is not make that field disabled(not editable) and populate with current date.. So you don't need a validation.
If you don't like this approach create an annotation of your own refer this url
Annotation for hibernate validator for a date at least 24 hours in the future
最简单的方法是不禁用该字段（不可编辑）并使用当前日期填充.. 所以你不需要验证。
如果您不喜欢这种方法，请创建您自己的注释，请参考此 url
Annotation for hibernate validator for a date at a date at least 24 hours in the future
Instead of 24 hour check, you need to check whether date value is equal to current date
您需要检查日期值是否等于当前日期，而不是 24 小时检查
