说明：  floodlight是目前SDN使用最广的控制器，本文档详细介绍了floodlight和mininet的安装和使用流程，并介绍了创建网络和添加修改流表的方法，均得到笔者实验应证
(SDN floodlight is currently the most widely used controller, this document details the floodlight and mininet process of installation and use, and introduced to create a network and add, modify flow table method, experiments have been the author should permit)