JPA注解@GeneratedValue及其strategy枚举

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1.源码

@Target({ElementType.METHOD, ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
public @interface GeneratedValue {
   
    GenerationType strategy() default GenerationType.AUTO;

    String generator() default "";
}

public enum GenerationType {
    TABLE,
    SEQUENCE,
    IDENTITY,
    AUTO;

    private GenerationTyp