java捕获数据包的包 众所周知，JAVA语言虽然在TCP/UDP传输方面给予了良好的定义，但对于网络层以下的控制，却是无能为力的。JPCAP扩展包弥补了这一点-java packet capture packet As we all know, JAVA language, while in the TCP/UDP transport give a good definition, but for the network layer below the control, but it