在单个表中的组合外键和主键上休眠一对一映射

@JoinColumns({    @JoinColumn(name="VERSION", referencedColumnName="VERSION"),    @JoinColumn(name="PARENT_ID", referencedColumnName="CATAGORY_ID")})@ManyTooneprivate Catagory parentId;@oneToMany(mappedBy="parentId")private List<Catagory> childs;

或

@IdClass

@EmbeddableId

public class CatagoryPk implements Serializable {    private Integer version;    private Integer catagoryId;    public CatagoryPk() {    }    public CatagoryPk(Integer version, Integer catagoryId) {        this.version = version;        this.catagoryId = catagoryId;    }}@Entity@IdClass(CatagoryPk.class)public class Catagory {    @Column(name="VERSION")    @Id private Integer version;    @Column(name="CATAGORY_ID")    @Id private Integer catagoryId;    @ManyToOne    @JoinColumns({        @JoinColumn(name="VERSION", referencedColumnName="VERSION", insertable=false, updatable=false),        @JoinColumn(name="PARENT_ID", referencedColumnName="CATAGORY_ID")    })    private Catagory parentId;}