Hibernate 单例模式及query查询

HibernateUtil

public class HibernateUtil {
    private static SessionFactory sf = null;
    private static Configuration cfg = null;
    static {
        try {
            cfg = new Configuration().configure();
            sf = cfg.buildSessionFactory();
        } catch (HibernateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    public static SessionFactory getSessionFactory() {
        return sf;
    }
    public static void closeSessionFactory(){
        sf.close();
    }
}

配置hibernate.cfg.xml

添加

		<property name="hibernate.current_session_context_class">thread</property>

使用query查询

try {
            sf = HibernateUtil.getSessionFactory();
            session= sf.openSession();
            ts = session.beginTransaction();
            Query query = session.createQuery("from user");
            List<user> User = query.list();
            for (int i=0;i<User.size();i++){
                user users= (user) User.get(i);
                System.out.println(users.getName()+"的密码"+users.getPassword());
            }
            ts.commit();
        } catch (HibernateException e) {
            e.printStackTrace();
            if(ts !=null){
                ts.rollback();
            }
        }finally {
            session.close();
            sf.close();
        }

结果