Jpa 在使用@EmbeddedId的实体上具有简单属性

当我有两个来自其他实体的属性用作实体中的主键时，我可以让这些其他实体实例直接成为实体上的成员：

@Entity
public class Position {

  @EmbeddedId
  private PositionKey positionKey;

  @MapsId("accountCode")
  @ManyToOne(fetch = FetchType.LAZY)
  private Account account;

  @MapsId("productId")
  @ManyToOne(fetch = FetchType.LAZY)
  private Product product;

}

@Embeddable
public class PositionKey {

   private String accountCode
   private Logn productId;
}

现在，假设嵌入的id是两种简单类型：

@Entity
public class Position {

  @EmbeddedId
  private PositionKey positionKey;

  // how can I have this here? @MapsId doesn't work
  private String accountCode;

  // how can I have this here? @MapsId doesn't work
  private Integer productId;

}

@Embeddable
public class PositionKey {

   private String accountCode
   private Long productId;
}

使用@EmbeddedId，Position类上是否可以有accountCode和productId属性