Embedded (Java EE 5 SDK)

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Java EE 5 SDK

深圳电信培训中心.徐海蛟老师.

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摘要: REQUIRED | OPTIONAL

详细信息: ELEMENT

javax.persistence Annotation Type Embedded

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

Defines a persistent field or property of an entity whose value is an instance of an embeddable class. The embeddable class must be annotated as Embeddable.

   Example:

   @Embedded
   @AttributeOverrides({
       @AttributeOverride(name="startDate",
           column=@Column("EMP_START")),
       @AttributeOverride(name="endDate", column=@Column("EMP_END"))
   })
   public EmploymentPeriod getEmploymentPeriod() { ... }

从以下版本开始:: Java Persistence 1.0

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