Tsinghua IP 清华大学学生写的一个有关IP的Java程序，探测IP用的,学习Java的朋友可下载自己研究吧，源代码和资源文件都在压缩包内。 -Tsinghua University, Tsinghua IP students to write a Java program on IP-detecting IP use, learning Java friends can download their study it, the source code and resource fi