通过传入本机IP地址获得本机网卡唯一性信息，我们在写网络应用时，经常需要获取本机网卡信息（不管是PC、还是笔记本），就算是给初学者省点时间，代码没有做容错，只是实现功能的小示例。-Card only information obtained by passing the machine IP address of the machine, in writing network applications, we often need to obtain the NIC of the machine