根据两个经纬度计算两地距离
com.baidu.mapapi.utils.DistanceUtil
哎
http://www.verydemo.com/demo_c161_i59188.html
http://ypf3027.iteye.com/blog/427055
http://www.blogjava.net/sinoly/archive/2007/01/22/95406.html
package a;public class Distance {private static final double EARTH_RADIUS = 6378137.0;public static void main(String[] args) {double lo1 = 108.90, la1 = 34.1;// 第一个经纬度double lo2 = 115.4648060, la2 = 38.8738910;// 第二个经纬度System.out.println("经纬度结果:" + getDistance(lo1, la1, lo2, la2));System.out.println("经纬度结果:" + getDistance(0, 0, 0, 0));}// 返回单位是米public static double getDistance(double longitude1, double latitude1,double longitude2, double latitude2) {double Lat1 = rad(latitude1);double Lat2 = rad(latitude2);double a = Lat1 - Lat2;double b = rad(longitude1) - rad(longitude2);double s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2)+ Math.cos(Lat1) * Math.cos(Lat2)* Math.pow(Math.sin(b / 2), 2)));s = s * EARTH_RADIUS;s = Math.round(s * 10000) / 10000;return s;}private static double rad(double d) {return d * Math.PI / 180.0;}}