说明：  Jpcap包是一个能过捕获和发送网络数据包的Java类库，它为网络数据包的捕获提供接口和系统支持,用于Java应用程序对网络数据包的捕获、分析及处理。
(Jpcap package is a Java class library that can capture and send network data packets. It provides interface and system support for network data packet capture. It is used to capture, analyze and process network data packets by Java applications.)