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                Spring Data JPA、JPA、Hibernate的關系如下。 :-: ![](https://img.kancloud.cn/2e/0c/2e0ca9906e41c5160bc71369f68012dd_623x574.jpg) JPA(Java Persistence API),即Java持久化API,是Sun官方在JDK5.0后提出的Java持久化<mark>規范</mark>,在后面你將看到很多的注解,他們都在`javax.persistence`包下。 <br/> Hibernate是基于JPA規范的具體<mark>實現</mark>,這樣的好處是開發者可以面向JPA規范進行持久層的開發,而底層的實現則是可以切換的。 <br/> Spring Data Jpa則是在JPA之上添加另一層抽象(Repository層的實現),極大地簡化持久層開發及ORM框架切換的成本。默認采用Hibernate作為實現。
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