Java 在复合键列上映射@OnetoOne

首先，我有两个实体Folder和FolderObjectID及其对应的表

在文件夹表上，我有复合键FolderID和ParentFolderID

Table Folder
+----------------+ 
|    Folder      |
+----------------+
|#FolderID       |
|#ParentFolderID |
+----------------+

在FolderObjectID表中，我将FolderObjectID作为主键

Table FolderObjectID
+----------------+
| FolderObjectID |
+----------------+
|#FolderObjectID |
+----------------+

文件夹实体

@Entity
@Table(name = "Folder")
public class Folder implements java.io.Serializable {

   private FolderId id;

   //setter getter
}

@Entity
@Table(name = "Folder")
public class Folder implements java.io.Serializable {

   @EmbeddedId
   private FolderId id;

   @OneToOne
   @MapsId("folderId")
   private FolderObject folderObject;
}

可嵌入类

@Embeddable
public class FolderId implements java.io.Serializable {

  private Integer folderId;
  private Integer parentFolderId;

  //setter getter
}

FolderObjectID实体

@Entity
@Table(name = "FolderObjectID")
public class FolderObjectID implements java.io.Serializable {

   private folderObjectId id;

   //setter getter
}

@Entity @Table(name = "FolderObjectID")
public class FolderObjectID implements java.io.Serializable {

   @Id
   private long folderObjectId;

   @OneToOne(mappedBy = "folderObject")
   @JoinColumn(name = "folderObjectId") 
   private Folder folder;
}

现在我想要的是两个实体上的一对一关系，使用Folder表的FolderID列链接FolderObjectID表的FolderObjectID列。不幸的是，我得到一个错误，说我在文件夹实体上有一个损坏的列

有人能在这件事上给我点化一下吗。

---

谢谢。

我想你想使用

@MapsId

功能。 与此类似，但我尚未尝试：

文件夹实体

@Entity
@Table(name = "Folder")
public class Folder implements java.io.Serializable {

   private FolderId id;

   //setter getter
}

@Entity
@Table(name = "Folder")
public class Folder implements java.io.Serializable {

   @EmbeddedId
   private FolderId id;

   @OneToOne
   @MapsId("folderId")
   private FolderObject folderObject;
}

FolderObjectID实体

@Entity
@Table(name = "FolderObjectID")
public class FolderObjectID implements java.io.Serializable {

   private folderObjectId id;

   //setter getter
}

@Entity @Table(name = "FolderObjectID")
public class FolderObjectID implements java.io.Serializable {

   @Id
   private long folderObjectId;

   @OneToOne(mappedBy = "folderObject")
   @JoinColumn(name = "folderObjectId") 
   private Folder folder;
}

---

FolderObjectID表中的主键是什么？根据你的描述，它应该是折叠的。因此，请先更正表结构，然后重新发布。FolderObjectID是主键。我有folderObjectId作为它的属性。我会试试这个。谢谢。：）很遗憾，@MapsId不可用。我想我用的是较低的版本。