Hibernate/JPA无法进行快速加载

Question

@Entity
@Table(name = "flightroutes")
public class Flightroute extends DomainObject<Integer> {

    @ManyToMany(fetch=FetchType.EAGER)
    private List<MeasureStation> measureStation;

@Entity
@Table(name = "measurestations")
public class MeasureStation extends DomainObject<Long> {
    @ManyToMany(mappedBy = "measureStation")
    private List<Flightroute> flightroutes;

Answer 1

发现：

 @ManyToMany(fetch=FetchType.EAGER)
    private List<MeasureStation> measureStation;

hibernate希望保持列表中元素的顺序（使用联接等），如果有两个列表，hibernate不能保持顺序。

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