ReferencedColumnNames未使用复合键映射到单个属性

Question

那么， 在阅读了几乎所有帖子后，我决定发布我的问题，因为我无法修复它。

• A类有一个主键（4个字段）

• B类有一个主键（2个字段）

  @Entity
  public class ClassA implements Serializable {
      private static final long serialVersionUID = 1L;
  
      @EmbeddedId
      private ClassAPK id;
  
      //bi-directional many-to-one association to ClassB
      @OneToMany(mappedBy="classA")
      private Set<ClassB> classB;
  

B类

@Entity
public class ClassB implements Serializable {
    private static final long serialVersionUID = 1L;


    @AttributeOverrides({
            @AttributeOverride(name = "id", column = @Column(name = "ID")),
            @AttributeOverride(name = "cod", column = @Column(name = "cod")),
            @AttributeOverride(name = "year", column = @Column(name = "year")),
            @AttributeOverride(name = "month", column = @Column(name = "month")) })
    @EmbeddedId
    private ClassBPK id;

    // bi-directional many-to-one association to ClassA
    @ManyToOne
    @JoinColumns({
            @JoinColumn(name = "id", referencedColumnName="ID")
             })
    private ClassA classA;


@Embeddable
public class ClassBPK implements Serializable {
    //default serial version id, required for serializable classes.
    private static final long serialVersionUID = 1L;

    @Column(name="ID")
    private long id;

    private int day;

    public ClassBPK() {
    }

有什么建议吗？ 感谢