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SUMMARY: REQUIRED | OPTIONAL

DETAIL: ELEMENT

javax.persistence Annotation Type Id

@Target(value={METHOD,FIELD}) @Retention(value=RUNTIME) public @interface Id

Implements: Annotation

@Target(value={METHOD, FIELD})
@Retention(value=RUNTIME)

指定实体的主键属性或字段。

示例：

   @Id
   public Long getId() { return id; }

since

Java Persistence 1.0

Specifies the primary key property or field of an entity.

   Example:

   @Id
   public Long getId() { return id; }