我已经开发了一个jpa示例,但它很好,但我在运行jpa运行另一个示例时遇到错误,下面给出了一个错误
on [EclipseLink-30005] (Eclipse Persistence Services - 2.0.2.v20100323-r6872): org.eclipse.persistence.exceptions.PersistenceUnitLoadingException Exception Description: An exception was thrown while searching for persistence archives with ClassLoader: sun.misc.Launcher$AppClassLoader@11b86e7 Internal Exception: javax.persistence.PersistenceException: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.0.2.v20100323-r6872): org.eclipse.persistence.exceptions.EntityManagerSetupException Exception Description: Predeployment of PersistenceUnit [testjpa] failed. Internal Exception: Exception [EclipseLink-7212] (Eclipse Persistence Services - 2.0.2.v20100323-r6872): org.eclipse.persistence.exceptions.ValidationException Exception Description: The attribute [updatedTime] from the entity class [class entity.Product] does not specify a temporal type. A temporal type must be specified for persistent fields or properties of …