@OneToMany 关系休眠

Question

大家好，我有实体：孩子：@EDIT 感谢@MithatKonuk@Entity@Table(name="child")public class Child {    @Id    @GeneratedValue(strategy = GenerationType.IDENTITY)    @Column(name="ID")    private int id;    @Column(name="FirstName")    private String firstName;    @Column(name="SecondName")    private String secondName;    @Column(name="PESEL")    private String PESEL;    @Column(name="Sex")    private String sex;  @JsonBackReference  @ManyToOne(cascade = CascadeType.ALL)  @JoinColumn(name="familyid",referencedColumnName = "id")  private Family family;和家人：@EDIT 感谢@MithatKonuk@Entity@Table(name="family")public class Family {    @Id    @GeneratedValue(strategy = GenerationType.IDENTITY)    @Column(name = "ID")    private int id;    @OneToOne(cascade = CascadeType.ALL)    private Father father;    @JsonManagedReference    @OneToMany(mappedBy = "family",fetch=FetchType.EAGER,cascade = CascadeType.ALL)    private List<Child> childList;我想获得属于家庭一部分的儿童名单。我尝试进行查询：@EDIT 感谢@MithatKonuk@Transactionalpublic List<Child> findAllChild(int id) {    // TODO Auto-generated method stub    HibernateUtil.initManager();    HibernateUtil.getEntityManager().clear();    Query query = HibernateUtil.getEntityManager().createQuery("SELECT child FROM Child child FETCH JOIN child.family u WHERE u.id = :userId ");    query.setParameter("userId",id);    List<Child> result = query.getResultList();    HibernateUtil.shutdown();    return result;}我需要你的帮助。@Edit 好的，所以我将此代码更新为完整实体。你还需要一些吗？很抱歉，这可能很容易，但我正在学习 hibernate，但我不知道这个 cos 出了什么问题。谢谢你的回答。