问一个关于QBC的问题.

Question

disjunction().add()的参数是Criterion 而我在add里面还想加条件 想再加个conjunction 请问怎么写呢?
[b]问题补充：[/b]
就是实现一个 where a＝a1 or b=b1 or ((c=c1 and d=d1) or (d=d1 and e=e2)or ...) 请问用QBC怎么写？

Answer 1

我喜欢分开写，一行一行看得清楚。
[code="java"]
DetachedCriteria dc = DetachedCriteria.forClass(clazz);

Junction and01 = Restrictions.conjunction();
and01.add(Restrictions.eq("c", 'c1'));
and01.add(Restrictions.eq("d", 'd1'));

Junction and02 = Restrictions.conjunction();
and02.add(Restrictions.eq("d", 'd1'));
and02.add(Restrictions.eq("e", 'e2'));

Junction or02 = Restrictions.disjunction().add(and01).add(and02);

Junction or01 = Restrictions.disjunction();
or01.add(Restrictions.eq("a", 'a1'));
or01.add(Restrictions.eq("b", 'b1'));
or01.add(or02);

dc.add(or01);
[/code]