EmbeddedId (Java EE 5)

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SUMMARY: REQUIRED | OPTIONAL

DETAIL: ELEMENT

javax.persistence Annotation Type EmbeddedId

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

Implements: Annotation

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

此类应用于实体类或映射的超类的持久字段或属性，以说明复合主键为可嵌入的类。可嵌入的类必须注释为 Embeddable。

示例：

    @EmbeddedId
    protected EmployeePK empPK;

since

Java Persistence 1.0

英文文档：

Is applied to a persistent field or property of an entity class or mapped superclass to denote a composite primary key that is an embeddable class. The embeddable class must be annotated as Embeddable.

    Example:

    @EmbeddedId
    protected EmployeePK empPK;

Since:: Java Persistence 1.0