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Integer userids[] = new Integer[]{1,2,3,.......};
String hql = "from user as u where u.userId in (:userids)";
Query query = session.createQuery(hql);
query.setParameterList("userids", userids);
List list = query.list();
List names = new ArrayList();
names.add("Izi");
names.add("Fritz");
Query q = sess.createQuery("from DomesticCat cat where cat.name in (:namesList)");
q.setParameterList("namesList", names);
List cats = q.list();