java通过经纬度计算两坐标点之间的距离

public class MapDistance {private static double EARTH_RADIUS = 6378.137;private static double rad(double d) {return d * Math.PI / 180.0;}public static double getDistance(double lat1, double lng1, double lat2,double lng2) {double radLat1 = rad(lat1);double radLat2 = rad(lat2);double a = radLat1 - radLat2;double b = rad(lng1) - rad(lng2);double s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2)+ Math.cos(radLat1) * Math.cos(radLat2)* Math.pow(Math.sin(b / 2), 2)));s = s * EARTH_RADIUS;s = Math.round(s * 10000) / 10000;return s;}}

貌似距离还要乘以1000才是对的。