java开源订销管理系统，系统主要实现的功能有订单录入、打印，销售汇总、原料管理、客户管理、生产配料计算、报表打印、汇总、系统数据管理及维护等功能-java open source provides sales management system, the system has the functions of the main entry of orders, printing, sales summary, raw materials management, customer managem