4
CriteriaBuilder builder = em.getCriteriaBuilder();
    CriteriaQuery cQuery = builder.createQuery();
    Root<AcsTemplateDateJPA> root = cQuery.from(AcsTemplateDateJPA.class);
    ParameterExpression<Date> d = builder.parameter(Date.class);
    cQuery.where(builder.between(d, root.<Date>get("inservicedate"), root.<Date>get("outservicedate"))); 
    Query query = em.createQuery(cQuery.select(root.get("acstemplateid"))).setParameter(d, planDate, TemporalType.DATE);
    List results =query.getResultList(); 

这里 outService 日期可以为空(结束在未来无限期)我如何添加这个条件?

谢谢,

4

2 回答 2

11

我会将日期比较分成两个块,并测试 if outservicedate isNull()。就像是:

Predicate startPredicate = builder.greaterThanOrEqualTo(root.<Date>get("inservicedate"), d);
Path<Date> outServiceDate = root.<Date>get("outservicedate");
Predicate endPredicate = builder.or(builder.isNull(outServiceDate), builder.lessThanOrEqualTo(outServiceDate, d));
Predicate finalCondition = builder.and(startPredicate, endPredicate);
于 2013-03-25T08:47:36.003 回答
-2

这应该是不言自明的:

                @Override
                public Predicate toPredicate( Root<OrganizationCommission> root, CriteriaQuery<?> query,
                                              CriteriaBuilder cb )
                {
                    // The predicate validFrom - the column should contains null or values less than validityDate
                    Predicate validFrom = cb.or( root.get( OrganizationCommission_.validFrom ).isNull(),
                                                 cb.lessThanOrEqualTo(
                                                         root.get( OrganizationCommission_.validFrom ),
                                                         validityDate ) );
                    // The predicate validTo - the column should contains null or values greater than validityDate
                    Predicate validTo = cb.or( root.get( OrganizationCommission_.validTo ).isNull(),
                                               cb.greaterThanOrEqualTo( root.get( OrganizationCommission_.validTo ),
                                                                        validityDate ) );
                    Predicate predicate = cb.conjunction();
                    predicate.getExpressions().add( cb.and( validFrom, validTo ) );
                    return predicate;
                }
于 2013-06-09T12:10:20.720 回答