根据提供的两个经纬度计算距离(米)

public static final double RAD = Math.PI / 180;
public static final double EARTH_RADIUS = 6378137;
public static double getDistance(double lng1, double lat1, double lng2, double lat2) {
        double radLat1 = lat1 * RAD;
        double radLat2 = lat2 * RAD;
        double a = radLat1 - radLat2;
        double b = (lng1 - lng2) * RAD;
        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 Math.abs(s);
}