查询所有示例
session.beginTransaction();
String hql = "from User"; // from 后跟的是要查询的对象，而不是表
Query query = session.createQuery(hql);
List<User> userList = query.list();
for(User user:userList){ System.out.println(user.getUserName());
}
session.getTransaction().commit();

获取一个不完整的对象
session.beginTransaction();
String hql = "select userName from User";
Query query = session.createQuery(hql);
List nameList = query.list();
for(Object obj:nameList){ System.out.println(obj);
}
session.getTransaction().commit();// 多个属性的话，需要用object[]接收

session.beginTransaction();
String hql = "select userName,userPwd from User";
Query query = session.createQuery(hql);
List nameList = query.list(); for(Object obj:nameList){ Object[] array = (Object[]) obj; // 转成object[]System.out.println("name:" + array[0]); System.out.println("pwd:" + array[1]);
}
session.getTransaction().commit();

统计和分组查询
session.beginTransaction();
String hql = "select count(*),max(id) from User";
Query query = session.createQuery(hql);
List nameList = query.list();
for(Object obj:nameList){ Object[] array = (Object[]) obj; System.out.println("count:" + array[0]); System.out.println("max:" + array[1]);
}
session.getTransaction().commit();

更多写法
select distinct name from Student; select max(age) from Student; select count(age),age from Student group by age; from Student order by age;

HQL占位符和分页session.beginTransaction();String sql ="select uname,password from User where enable=?";Query query =session.createQuery(sql);//占位符内容query.setBoolean(0, true);//第几个开始query.setFirstResult(0);//显示个数query.setMaxResults(2);List<Object[]> list = query.list();        for (Object[] user : list) {System.out.println(user[0]+"--"+user[1]);}session.getTransaction().commit();

addEntity()示例
session.beginTransaction(); String sql = "select id,username,userpwd from t_user"; // addEntity()可以告诉Hibernate你想要封装成对象的类型，然后自动为你封装
SQLQuery query = session.createSQLQuery(sql).addEntity(User.class); List<User> list = query.list(); for(User user : list){ System.out.println(user.getUserName());
} session.getTransaction().commit();

uniqueResult示例
session.beginTransaction(); String sql = "select id,username,userpwd from t_user where id = 2";
SQLQuery query = session.createSQLQuery(sql).addEntity(User.class); User user = (User) query.uniqueResult(); System.out.println(user.getUserName()); session.getTransaction().commit();