捕获网络数据包的方法，基于Jpcap的网络嗅探程序设计-Capture network packets method Jpcap-based network sniffer program design

本程序实现了有关数据报的捕获，基于Java语言，用jpcap来捕获数据包-This procedure implements the packet capture, based on Java language, to capture packets with jpcap