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Java JPA官方文档在哪,初学者该怎么学?

通过一些教程学到了一些注解,例如下面的@ID注解和@GeneratedValue注解:

@Entity
@Table(name = "T_PERSON")
public class Person {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
}

我看的教程里面冷不丁就直接冒出来个GenerationType.IDENTITY,我都不知道为啥要这样用。

这时候我就困惑了:@GeneratedValuestrategy属性一共有多少种啊?我怎么知道该用哪个呢?我觉得官方的API文档应该说的比较全,所以我试图上网搜「Java JPA」,结果搜出来的都是「Spring Data JPA」。


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