hibernate关于多对多映射和多对一的hql查询

public void queryCustomerbymerchantId(){
        SessionFactory sf = HibernateUtil.getSessionFactory();
        Session session = sf.getCurrentSession();
        Transaction ts = session.beginTransaction();
        try {
       Query query=session.createQuery("select c from Customer c join c.merchant m where m.mid=1");
       List customer = query.list();
       for(int i=0;i<customer.size();i++)
       {
        Customer customers =(Customer)customer.get(i);
            System.out.println(i+"--"+customers);
       }  

        ts.commit();      

    } catch (HibernateException e) {
        // TODO Auto-generated catch block
        if(ts != null)
        {
            ts.rollback();
        }
        e.printStackTrace();
    }
}

public void queryCustomerbyOrderId(){
        SessionFactory sf = HibernateUtil.getSessionFactory();
        Session session = sf.getCurrentSession();
        Transaction ts = session.beginTransaction();
//      int n;
//      Scanner sc=new Scanner(System.in);
//      n=sc.nextInt();
        try {
       Query query=session.createQuery("select customer from Order o where  o.id=1" );
       System.out.println(query);
       List customer = query.list();
       for(int i=0;i<customer.size();i++)
       {
        Customer customers =(Customer)customer.get(i);
            System.out.println(i+"--"+customers);
       }  

        ts.commit();      

    } catch (HibernateException e) {
        // TODO Auto-generated catch block
        if(ts != null)
        {
            ts.rollback();
        }
        e.printStackTrace();
    }
}

原文地址：https://www.cnblogs.com/acefeng/p/9206289.html