一个毕业设计的作品，适合小型的企业应用，请大家支持作者，不要随意更改作品，谢谢了！！在此传播只为更多的人能够认识作者-A graduate design work, suitable for small-scale enterprise applications, please support the author and not arbitrarily change the works, Thank you! ! In the dissemination only to raise aware