Hibernate(JPA)如何做一个急切的查询,加载所有子对象

@Entity
public class ParentEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @OneToMany(mappedBy = "parent", cascade = CascadeType.ALL, fetch = FetchType.EAGER)
    private List<ChildEntity> children;
}

@Entity
public class ChildEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "parent_id")
    private ParentEntity parent;
}

Session session = sessionFactory.openSession();
Transaction transaction = session.beginTransaction();

ParentEntity parent = session.get(ParentEntity.class, parentId);

// 由于设置了 FetchType.EAGER，这里的 children 列表将自动加载
List<ChildEntity> children = parent.getChildren();

transaction.commit();
session.close();