Transaction not successfully started 异常的解决

static void count()
 {
  Session session = sessionFactory.openSession();
  Transaction tran = session.beginTransaction();//此处开启了事务处理
  Query query = session.createQuery(" from Product");
  List<Product> list = query.list();

  try
  {
   for (Product p : list)
   {
    // 输出测试
    System.out.println("name:" + p.getName());
    ProductType type = p.getType();
    // 输出测试
    System.out.println("name:" + type.getName());
    type.setCount(type.getCount() + 1);
    // 更新类型的数量
    session.update(type);
    ProductType parent = type.getParents();
    while (parent != null)
    {
     // 输出测试
     System.out.println("name:" + parent.getName());
     parent.setCount(parent.getCount() + 1);
     // 更新类型的数量
     session.update(type);
     parent = parent.getParents();
    }    

     //tran.commit();在此处提交了事务
   }
   tran.commit();
  } catch (Exception e)
  {
   if (tran != null)
   {
    tran.rollback();
   }
  }
  finally
  {
   session.close();
  }
 }

 

 

太粗心大意了，刚开始使用Hibernate还是不太熟练。O(∩_∩)O~