我自己打的一个geoip调用包文件，用import com.maxmind.geoip.*调用，网上下一个Geoip.dat就可以使用，功能是用j2ee在PC机上实现地理定位

This utility geo-locates the IP addresses on the path of a network packet in an IP network and displays them on a map. //Use Maxmind s Getloaction NodeInfo.LocationService = new Maxmind.NodeInfoLookupService()

GeoIP® is the proprietary technology that drives MaxMind s IP geolocation data and services. GeoIP provides businesses with a non-invasive way to determine geographical and other information about their Internet visit

模式识别最大最小距离算法实现，matlab实现的，可以直接运行-Pattern recognition of maximum and minimum distance algorithm to achieve the Matlab