Java dos puntos de latitud y longitud para calcular la distancia y el ángulo

ángulo

/*
     * 计算两点对于正北方向的朝向角度 [0,360]
     * @param {*} start format:{'latitude': 30, 'longitude': 120 }
     * @param {*} end
     */
    private static double bearing(List<Double> start, List<Double> end) {
    
    
        double rad = Math.PI / 180,
                lat1 = start.get(1) * rad,
                lat2 = end.get(1) * rad,
                lon1 = start.get(0) * rad,
                lon2 = end.get(0) * rad;
        double a = Math.sin(lon2 - lon1) * Math.cos(lat2);
        double b = Math.cos(lat1) * Math.sin(lat2) -
                Math.sin(lat1) * Math.cos(lat2) * Math.cos(lon2 - lon1);
        double angle = radiansToDegrees(Math.atan2(a, b));
        if (angle < 0) {
    
    
            angle = 360 + angle;
        }
        return angle;
    }
    /*
     * 弧度转换为角度
     */
    private static double radiansToDegrees(double radians) {
    
    
      double degrees = radians % (2 * Math.PI);
      return degrees * 180 / Math.PI;
    }

distancia

    /**
     *
     * @param long1 经度1
     * @param lat1 纬度1
     * @param long2 经度2
     * @param lat2 纬度2
     * @return 米
     */
    public static double getDistance(double long1, double lat1, double long2, double lat2) {
    
    
        double a, b, R;
        R = 6378137; // 地球半径
        lat1 = lat1 * Math.PI / 180.0;
        lat2 = lat2 * Math.PI / 180.0;
        a = lat1 - lat2;
        b = (long1 - long2) * Math.PI / 180.0;
        double d;
        double sa2, sb2;
        sa2 = Math.sin(a / 2.0);
        sb2 = Math.sin(b / 2.0);
        d = 2 * R * Math.asin(Math.sqrt(sa2 * sa2 + Math.cos(lat1) * Math.cos(lat2) * sb2 * sb2));
        return d;
    }