JPA规范官方文档
TheJavaEE5TutorialChapter24IntroductiontotheJavaPersistenceAPITheJavaPersistenceAPIprovidesanobject/relationalmappingfacilitytoJavadevelopersformanagingrelationaldatainJavaapplications.JavaPersistenceconsistsofthreeareas:TheJavaPersistenceAPIThequerylanguageObject/relationalmappingmetadata(TheJavaEE5TutorialChapter24IntroductiontotheJavaPersistenceAPITheJavaPersistenceAPIprovidesanobject/relationalmappingfacilitytoJavadevelopersformanagingrelationaldatainJavaapplications. JavaPersistenceconsistsofthreeareas:TheJavaPersistenceAPIThequerylanguageObject/relationalmappingmetadata)
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