Enumerated (Java EE 5)

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SUMMARY: REQUIRED | OPTIONAL

DETAIL: ELEMENT

javax.persistence Annotation Type Enumerated

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

Implements: Annotation

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

指定应该做为枚举类型保留的持久属性或字段。它可以与 Basic 注释一起使用。

示例：

   public enum EmployeeStatus {FULL_TIME, PART_TIME, CONTRACT}

   public enum SalaryRate {JUNIOR, SENIOR, MANAGER, EXECUTIVE}

   @Entity public class Employee {
       public EmployeeStatus getStatus() {...}
       @Enumerated(STRING)
       public SalaryRate getPayScale() {...}
       ...
   }

since

Java Persistence 1.0

英文文档：

Specifies that a persistent property or field should be persisted as a enumerated type. It may be used in conjunction with the Basic annotation.

   Example:

   public enum EmployeeStatus {FULL_TIME, PART_TIME, CONTRACT}

   public enum SalaryRate {JUNIOR, SENIOR, MANAGER, EXECUTIVE}

   @Entity public class Employee {
       public EmployeeStatus getStatus() {...}
       @Enumerated(STRING)
       public SalaryRate getPayScale() {...}
       ...
   }