如果查询返回多个值用list()方法
1 public void testQuery(){ ??2 ????????Configuration config = new Configuration().configure(); ??3 ????????SessionFactory factory = config.buildSessionFactory(); //创建SessionFactory ???4 ????????Session session = factory.openSession(); ???????//创建Session ???5 ????????session.beginTransaction(); ????????????????????//开始事务 ???6 ???????????7 ????????Query query = session.createQuery("from Student"); ??8 ????????List list = query.list(); ?// 用list方法返回多个值 ???9 ????????//List list = session.createQuery("from Student").list(); ??10 ????????for(int i=0;i<list.size();i++){ ?11 ????????????Student student = (Student)list.get(i); ?12 ????????????System.out.print(student.getId()+" "); ?13 ????????????System.out.print(student.getName()+" "); ?14 ????????????System.out.print(student.getSex()+" "); ?15 ????????????System.out.print(student.getBirthday()); ?16 ????????????System.out.println(); ?17 ????????} ????????18 ??????????19 ????????session.getTransaction().commit(); ????????//提交事务 ???20 ????????session.close(); ??????????????????????????//关闭Session ??21 ????} 当确定返回的实例只有一个或者null时 用uniqueResult()方法
1 public void testGet(){ ??2 ????????Configuration config = new Configuration().configure(); ??3 ????????SessionFactory factory = config.buildSessionFactory(); ??4 ????????Session session = factory.openSession(); ??5 ????????session.beginTransaction(); ??6 ???????????7 ????????Query query = session.createQuery("from Student s where s.id=?"); ??8 ????????query.setString(0, "2"); ??9 ????????Student student = (Student)query.uniqueResult(); ?//当确定返回的实例只有一个或者null时 用uniqueResult()方法 ??10 ????????//Student student = (Student)session.createQuery("from Student s where s.id=?").setString(0,"5").uniqueResult(); ??11 ??????????12 ????????System.out.println(student.getName()); ?13 ????????System.out.println(student.getBirthday()); ?14 ??????????15 ??????16 ????????session.getTransaction().commit(); ?17 ????????session.close(); ?18 ????} ?Hibernate之Query接口的uniqueResult()方法
原文地址：http://www.cnblogs.com/slowcity/p/7469360.html