如何在JPA（eclipselink）中使用joda时间？

问题描述

我尝试在实体类中使用 DataTime 。在字段上方添加 @Temporal（TemporalType.DATE），我收到错误提示Temporal类型的持久字段或属性必须是java.util类型.Date，java.util.Calendar或java.util.GregorianCalendar。我可以来回介绍转换;使用setter和getter如下：

I tried to use the DataTime in my entity class. Adding @Temporal(TemporalType.DATE) above the field, I got the error saying "The persistent field or property for a Temporal type must be of type java.util.Date, java.util.Calendar or java.util.GregorianCalendar". I can introduce the conversion back and forth; using setters and getters as follows:

@Temporal(TemporalType.DATE)
private Calendar attendanceDate;

public DateTime getAttendanceDate() {
    return new DateTime(this.attendanceDate);
}

public void setAttendanceDate(DateTime attendanceDate) {
    this.attendanceDate = attendanceDate.toCalendar(Locale.getDefault());
}

但我希望 eclipselink 为我做这件事。我已经离开了'。答案建议使用hibernate，但我必须使用eclipselink。我可以在我的实体类中使用 DateTime 对象，数据库表示为 BLOB ，但我需要它为日期。有什么像 jodatime-eclipselink ？还是其他任何建议？感谢您的帮助。

but I hope eclipselink to do it for me. I have gone thro' Persist Joda-time's DateTime via Hibernate. The answer suggesting to use hibernate, but I have to use eclipselink. I can use the DateTime object in my entity class with DB representation as BLOB, but I need it as Date. Is there anything like jodatime-eclipselink? Or any other suggestion? Thanks for the help.

推荐答案

基本链接定义了一个EclipseLink转换器，用于从Joda DateTime转换为java.sql.Timestamp或Date 。
您可以使用它，或者定义您自己的转换器并通过EclipseLink中的@Convert，@ Confverter使用它。

Basic the link defines an EclipseLink Converter to convert from Joda DateTime to java.sql.Timestamp or Date.You could use it, or define your own converter and use it through @Convert, @Converter in EclipseLink.

对于DDL创建，转换器应该定义初始化方法并将映射字段上的类型设置为java.sql.Timestamp。

For DDL creation, the converter should define the initialize method and set the type on the mapping's field to java.sql.Timestamp.

请在EclipseLink中记录此错误（或对现有错误进行投票），我们应该支持Joda。

Please log a bug (or vote for the existing one) on this in EclipseLink, we should have support for Joda.

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