怎么使用hibernate 查询

今天主要将hibernate的HQL查询：

 HQL:Hibernate Query Languge 

public class TestHQL {private SessionFactory sessionFactory;private Session session;private Transaction transaction;@Beforepublic void before(){Configuration configuration=new Configuration().configure();sessionFactory = configuration.buildSessionFactory();session = sessionFactory.openSession();transaction = session.beginTransaction();}@Afterpublic void after(){transaction.commit();session.close();sessionFactory.close();}@Testpublic void testhql(){//查询所有//List<Person> persons=session.createQuery("from Person").list();//for (Person person : persons) {//System.out.println(person);//}//查询某一列//List<String> names=session.createQuery("select pname from Person").list();//for (String string : names) {//System.out.println(string);//}//查询某几列    查询结果来源于多张表//List<Object[]> objects=session.createQuery("select pname,page from Person").list();//for (Object[] objects2 : objects) {//String pname=objects2[0].toString();//int page=Integer.parseInt(objects2[1].toString());//System.out.println(pname+" "+page);//}//构造查询//List<Person> persons=session.createQuery("select new Person(pname,page) from Person").list();//for (Person person : persons) {//System.out.println(person);//}//带条件查询//查询年龄在15 到 60 之间//List<Person> persons=session.createQuery("from Person where page between ? and ?").setInteger(0, 15).setInteger(1, 60).list();//List<Person> persons=session.createQuery("from Person where page between :min and :max").setInteger("min", 15).setInteger("max", 60).list();//for (Person person : persons) {//System.out.println(person);//}//聚合函数//int page=Integer.parseInt(session.createQuery("select max(page) from Person").uniqueResult().toString());//System.out.println(page);//分页//int pageNo=2;//int pageSize=2;//List<Person> persons=session.createQuery("from Person").setFirstResult((pageNo-1)*pageSize).setMaxResults(pageSize).list();//for (Person person : persons) {//System.out.println(person);//}//排序//年龄//List<Person> persons=session.createQuery("from Person order by page desc").list();//for (Person person : persons) {//System.out.println(person);//}//对象导航//session.createQuery("from Person p where p.city.caddress like ")}