摘要： 对应数据库中两张表:salesorder(id,userid,addr,odate,status);salesitem(id,productid,unitprice,pcount,orderid);对应两个类：SalesOrder,SalesItem;properties:id,userId,addr,odate,Cart c;properties:id,productId,unitPrice,pcount,orderId;OrderMgr:methods:saveOrder(SalesOrder so);OrderMySqlDAO:public void saveOrder(SalesOrd 阅读全文