用Hibernate验证日期 [英] Validation of a date with Hibernate

问题描述

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。对话框如下所示：

< img src =https://i.stack.imgur.com/zy7Ce.pngalt =在这里输入图片描述>

结束日期已经验证，如下面的代码所示。 Hibernate中的 @Future 注释可确保日期处于未来状态。

  @NotNull 
 @Future 
 @DateTimeFormat（pattern =dd / MM / yyyy）
 @Temporal（TemporalType.DATE）
 private date dateDate; 
  

编辑

<我被要求向开始日期添加验证。只允许现在或未来的日期。我试图使用 @Present 注释，但我想没有这样的事情。不幸的是， @Future 不接受今天的日期。我对这种事情很陌生。所以我希望有人能帮助我。谢谢。

解决方案

Hibernate

您可以使用

  @CreationTimestamp 
 @Temporal（TemporalType.DATE）
 @Column（name = create_date）
私人日期startDate; 
  

或更新中

  @UpdateTimestamp 
 @Temporal（TemporalType.TIMESTAMP）
 @Column（name =modify_date）
 private日期startDate; 
  

Java（JPA）

您可以定义一个字段 Date startDate; 并使用

  @PrePersist 
 protected void onCreateStartDate（）{
 startDate = new Date（）; 
  

或更新中

  @PreUpdate 
 protected void onUpdateStartDate（）{
 startDate = new Date（）; 
  

更新和示例

在更新问题后，如果不将开始日期修改为现在，则必须采取其他方法。您需要编写自定义验证程序来检查日期是现在还是将来，例如。

因此，您可以在 PresentOrFuture.java ：

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

然后你必须在 PresentOrFutureValidator中定义验证器。 java ：

  public class PresentOrFutureValidator 
 implements ConstraintValidator< PresentOrFuture，Date> {
 
 public final void initialize（final PresentOrFuture annotation）{} 
 
 public final boolean isValid（final Date，$ b $ final ConstraintValidatorContext context）{
 
 //只使用日期进行比较
日历日历= Calendar.getInstance（）; 
 calendar.set（Calendar.HOUR_OF_DAY，0）; 
 calendar.set（Calendar.MINUTE，0）; 
 calendar.set（Calendar.SECOND，0）; 
 
今天的日期= calendar.getTime（）; 
 
 //您的日期必须在今天或今天之后（==不在今天之前）
 return！value.before（today）|| value.after（今天）; 
 
 
 
 
 
 $ b然后你必须设置： / p> 
 
 
  @NotNull 
 @PresentOrFuture 
 @DateTimeFormat（pattern =dd / MM / yyyy）
 @Temporal（TemporalType.DATE）
 private日期startDate; 
  
好的，那是非常详尽的。我没有自己测试过，因为我现在没有这样做的设置，但它应该工作。我希望它有帮助。
 
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:



The "End Date" is already validated as shown in the code below. The @Future annotation in Hibernate ensures that the date is in the future.
@NotNull
@Future
@DateTimeFormat(pattern = "dd/MM/yyyy")
@Temporal(TemporalType.DATE)
private Date endDate;
EDIT

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 @Present annotation, but I guess there is no such thing. Unfortunately, @Future does not accept today's date. I am new to this kind of thing. So I hope someone can help me. Thank you.
解决方案
Hibernate

You can use
@CreationTimestamp
@Temporal(TemporalType.DATE)
@Column(name = "create_date")
private Date startDate;
or on update
@UpdateTimestamp
@Temporal(TemporalType.TIMESTAMP)
@Column(name = "modify_date")
private Date startDate;
Java (JPA)

You can define a field Date startDate; and use
@PrePersist
protected void onCreateStartDate() {
startDate = new Date();
or on update
@PreUpdate
protected void onUpdateStartDate() {
startDate = new Date();
Update and example

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.

Therefore you can introduce a new annotation in 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:
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:
@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.

                        
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