createQuery 与 createNativeQuery 区别

iabernate 中createQuery与createSQLQuery区别，使用经验

createQuery与createSQLQuery两者区别是：

前者用的hql语句进行查询，后者可以用sql语句查询

前者以hibernate生成的Bean为对象装入list返回

后者则是以对象数组进行存储

所以使用createSQLQuery有时候也想以hibernate生成的Bean为对象装入list返回

如下示例：

@Override
public List<Commodity> findCommodityByActyId(int activityId) {
String sql = "SELECT aa.ACTIVITYSCOPE_VALUE from activity_scope aa LEFT JOIN activity_rule ar ON aa.ACTIVITYRULE_ID = ar.ACTIVITYRULE_ID LEFT JOIN"
+" activity ac on ar.ACTIVITY_ID = ac.ACTIVITY_ID where ac.ACTIVITY_ID ="+activityId+" and ac.status=3";
System.out.println(sql);
Query query = entityManager.createNativeQuery(sql);
List<Integer> commoditiyIds = (List<Integer>)(query.getResultList());
List<Commodity> commodities = new ArrayList<Commodity>();
for(int i=0;i<commoditiyIds.size();i++) {
String sql2 = "from Commodity c where c.commodityId=:c1";
Query query2 = entityManager.createQuery(sql2);
query2.setParameter("c1", commoditiyIds.get(i));
Commodity c = (Commodity) query2.getResultList().get(0);
commodities.add(c);
}
return commodities;
}