Hibernate 子查询

TABLE  A  ( id, type1, type2)   id 是主键
TABLE  B  (idType1,idType2)   其中 (idType1,idType2) 是联合主键
eg:
A   id  type1 type2
     1    t1      null
     2    null     t2
     3    t1      null
     4    null      t2

B : 
    idType1   idType2
       1                2
       1                4
       3                2
       3                4

SELECT 
            a.* 
FROM 
           A a 
WHERE  
              a.type1 = 't1' 
        and a.id in (
                            SELECT 
                                         b.idType2 
                            FROM   
                                         B b 
                            WHERE 
                                        b.idType1 = 1
                         )

请用 Hibernate 的 Criteria 来实现这句SQL
       要直接拿到结果集。不要先搜出来 List<Long> idType2 作为条件再作第二次搜索

 Criteria criteria = this.getSession().createCriteria(A.class); DetachedCriteria detachedCriteria = DetachedCriteria.forClass(B.class); detachedCriteria.setProjection(Projections.projectionList().add(Projections.groupProperty("b.idType2"))); detachedCriteria.add(Restrictions.eq("b.idType1", 1)); criteria.add(Subqueries.propertyIn("a.id", detachedCriteria)); criteria.add(Restrictions.eq("a.type1",“t1”)); if (criteria.list().size() > 0) { return (A) criteria.list().get(0); } else { return null; } Exzample: Criteria criteria = this.getSession().createCriteria(this.getPersistentClass()); DetachedCriteria detachedCriteria = DetachedCriteria.forClass(ServiceProvider.class); ProjectionList proList4DetachedCriteria = Projections.projectionList(); proList4DetachedCriteria.add(Projections.groupProperty("id")); detachedCriteria.setProjection(proList4DetachedCriteria); ProjectionList proList4Criteria = Projections.projectionList(); proList4Criteria.add(Projections.countDistinct(International.PROP_CODE)); criteria.setProjection(proList4Criteria); // criteria.add(Restrictions.in(International.PROP_ID, new Object[] { 205, 584, 647, 648 })); criteria.add(Subqueries.propertyIn(International.PROP_ID, detachedCriteria)); Object counter = criteria.uniqueResult(); if (counter != null) { return ((Number) counter).intValue(); }