Java ReferencedColumnNames未使用复合键映射到单个属性

那么， 在阅读了几乎所有的帖子后，我决定发布我的问题，因为我无法解决它

• A类有一个主键（4个字段）
• B类有一个主键（2个字段）
  有什么建议吗？

  ---

  谢谢
  问题是什么？问题是什么？

  @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;
  

  @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() {
      }