说明：  no intro
(JPcap used to achieve ipv6 packet capture and analysis. JPcap because of the function can provide depth to the data link layer to capture packets, so regardless of the packet are IPv4 or IPv6 data packets have been encapsulated in the Ethernet header, and therefore are able to be arrested. This procedure provided by the use of JPcap function, implementation of the capture and analysis in a pure IPv6 or dual stack environment environment IPv6 packet transmission)