jpa 树的父子节点映射记录

jpa 父子节点映射记录：（加入条件station_code）:

----------------------------------------------------------------------------
@OneToMany(fetch = FetchType.EAGER)
@JoinColumn(name = "parent_id", referencedColumnName = "rela_tree_id")
@JoinColumn(name = "station_code", referencedColumnName = "station_code")
private Set<StationInfRelaTree> children;
-----------------------------------------------------------------------------

@Entity
@Table(name = "b_stationinfrelatree")
@JsonIgnoreProperties(value = {"hibernateLazyInitializer", "handler", "fieldHandler"})
public class StationInfRelaTree implements Serializable {

    @Id
    @Column(length = 20, name = "id")
    private String id;

    @Column(length = 20, name = "rela_tree_id")
    private String relaTreeId;

    /**
     * 上級
     */
    @JsonIgnore
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "parent_id", referencedColumnName = "rela_tree_id")
    private StationInfRelaTree parent;

//    @OneToMany(fetch = FetchType.EAGER, mappedBy = "parent")
    //@OrderBy(value = "code asc")

    @OneToMany(fetch = FetchType.EAGER)
    @JoinColumn(name = "parent_id", referencedColumnName = "rela_tree_id")
    @JoinColumn(name = "station_code", referencedColumnName = "station_code")
    private Set<StationInfRelaTree> children;

    /**
     * 车站名称
     */
    @Column(length = 20, name = "station_name")
    private String stationName;

    /**
     * 信息状态
     */
    @Column(length = 1, name = "rela_tree_state")
    private String relaTreeState;

    /**
     * 车站站码
     */
    @Column(length = 20, name = "station_code")
    private String stationCode;