我试图在特定的日期间隔内获取所有MainIntervals。但我总是空。JPQL BETWEEN日期间隔
这里是JPA实体
@Table(name="MAIN_INTERVAL")
@NamedQueries({
@NamedQuery(name = MainInterval.FIND_ALL, query = " select m from MainInterval m"),
@NamedQuery(name = MainInterval.FIND_BETWEEN,
query = "select m from MainInterval m where m.mainIntervalStart
BETWEEN :startDate AND :endDate
AND m.mainIntervalEnd BETWEEN :startDate AND :endDate"
) })
public class MainInterval implements Serializable {
public static final String FIND_ALL = "MainInterval.findAll";
public static final String FIND_BETWEEN = "MainInterval.findBetween";
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name="MAIN_INTERVAL_ID")
private Long id;
@Column(name="MAIN_INTERVAL_START")
@Temporal(javax.persistence.TemporalType.DATE)
private Date mainIntervalStart;
@Column(name="MAIN_INTERVAL_END")
@Temporal(javax.persistence.TemporalType.DATE)
private Date mainIntervalEnd; }
而在EJB SessionBeans我的方法:
public List<MainInterval> findMainIntervalsBetween(Date startDate, Date endDate){
List<MainInterval> resultList = em.createNamedQuery(MainInterval.FIND_BETWEEN, MainInterval.class)
.setParameter("startDate", startDate, TemporalType.DATE).setParameter("endDate", endDate, TemporalType.DATE).getResultList();
return resultList;
}
但是,当我与CDI把它从JSF的resultList总是空。虽然我有一些满足startDate和endDate之间条件的MainIntervals。
我会非常感谢每个答案或链接的教程。 此致敬礼!
它真的是空吗?我会理解它是否为空,但不为空。 –
嗨JB Nizet。那么我现在再测试它。你是对的。它不为空。但是当我使用例如findMainIntervalsBetween(10.05.2012,20.05.2012)调用该方法时,我得不到任何东西,尽管在数据库中我有MainIntervals([01.05.2012,31.05.2012],[01.05.2012,01.08.2012 ] Date pattern pattern =“dd/MM/yyyy”。任何想法? – Laith
接受答案是很好的,因为它(包括后面的评论)看起来非常合适,我建议你也应该注意。 –