EmbeddedId (Java EE 5 SDK)

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Java EE 5 SDK

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摘要: REQUIRED | OPTIONAL

详细信息: ELEMENT

javax.persistence Annotation Type EmbeddedId

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

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;

从以下版本开始:: Java Persistence 1.0

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