Java spring数据对象继承映射问题

我想要这样的表格建模：

Item Table
-----------------
| type  |   id  |
-----------------
FOOD          1
FOOD          2
CLOTHES       1
CLOTHES       2
CLOTHES       3

Item Table
-----------------
| type  |   id  |
-----------------
FOOD          1
FOOD          2
CLOTHES       3
CLOTHES       4
CLOTHES       5

接下来是我编写的java代码

@Entity
@Inheritance(strategy = InheritanceType.JOINED)
@DiscriminatorColumn
public abstract class Item {
 
    @Id private Long id;
}

此java代码创建如下表：

Item Table
-----------------
| type  |   id  |
-----------------
FOOD          1
FOOD          2
CLOTHES       1
CLOTHES       2
CLOTHES       3

Item Table
-----------------
| type  |   id  |
-----------------
FOOD          1
FOOD          2
CLOTHES       3
CLOTHES       4
CLOTHES       5

我希望主键是item type和id。 如果您能给我一个解决方案，我将不胜感激。 或者你可以建议其他设计

@Entity
@DiscriminatorValue
public class Clothes {
 
}

@Entity
public class Order {
 
     @Id private Long id;
     private Item item;
}

Item Table
-----------------
| type  |   id  |
-----------------
FOOD          1
FOOD          2
CLOTHES       3
CLOTHES       4
CLOTHES       5