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 (either the PC or notebook), even for beginners and save some time, the code does notdo fault-tolerant, but the small sample of the function.