堅持對象的對象中使用JPA

Question

我有這樣的對象

@Entity 
public class Cat { 
    @Id String name; 
    Fur fur; 
} 

public class Fur { 
    String color1; 
    String color2; 
} 

如何將其映射到：

Name  Color1 Color2 
+---------+------+------+ 
|SnowBall |red |green | 
+---------+------+------+ 
|Snowball2|white |black | 
+---------+------+------+ 

我只有JPA 2.1

Answer 1

您可以使用@Embeddable和@Embedded JPA註釋。

@Entity 
public class Cat { 
    @Id String name; 
    @Embedded 
    Fur fur; 
} 

@Embeddable 
public class Fur { 
    String color1; 
    String color2; 
}