java根据经纬度坐标计算两点的距离算法，与百度地图测距工具相符

public IdDTO getDistance(List<double[]> latLngs) {
    double distance = 0.0;
    if (latLngs.size() >= 2) {
        for (int i = 1; i < latLngs.size(); i++) {
            double R = 6378.137; // 地球半径
            double lat1 = latLngs.get(i-1)[1] * Math.PI / 180.0;
            double lng1 = latLngs.get(i-1)[0] * Math.PI / 180.0;
            double lat2 = latLngs.get(i)[1] * Math.PI / 180.0;
            double lng2 = latLngs.get(i)[0] * Math.PI / 180.0;

            double d =  Math.acos(Math.sin(lat1)*Math.sin(lat2)+Math.cos(lat1)*Math.cos(lat2)*Math.cos(lng2-lng1))*R;
            d = (double)Math.round(d*100000)/100000;
            distance += d;
        }
    }
    logger.info("distance->{}", distance);
    distance = (double)Math.round(distance*100000)/100000;
    return new IdDTO(String.valueOf(distance));
}