<generator class="native"> 有主键自增长，解决插入失败

-- Hibernate中关于持久化类的配置  注意id下Generator子节点 class属性配置为native
< hibernate - mapping xmlns = " urn:nhibernate-mapping-2.2 " >
     < class  name = " TestHibernateExpre.Entities.OrderListModel,TestHibernateExpre "  table = " OrderList " >
         < id name = " Orderid "  column = " id "  type = " int " >
             <!-- id中参数的设置问:native / assigned / foreign / increment -->
             < generator  class = " native " ></ generator >
         </ id >
       </ class >