java 地心坐标系（ECEF）和WGS-84坐标系（WGS84）互转

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 public static String WGS84toECEF(double latitude, double longitude, double height)
    {
        double X;
        double Y;
        double Z;
        double a = 6378137;
        double b = 6356752.314245;
        double E = (a * a - b * b) / (a * a);
        double COSLAT = Math.cos(latitude * Math.PI / 180);
        double SINLAT = Math.sin(latitude * Math.PI / 180);
        double COSLONG = Math.cos(longitude * Math.PI / 180);
        double SINLONG = Math.sin(longitude * Math.PI / 180);
        double N = a / (Math.sqrt(1 - E * SINLAT * SINLAT));
        double NH = N + height;
        X = NH * COSLAT * COSLONG;
        Y = NH * COSLAT * SINLONG;
        Z = (b * b * N / (a * a) + height) * SINLAT;
        return X + "," + Y + "," + Z;
    }


    public static String ECEFtoWGS84(double x, double y, double z)

    {
        double a, b, c, d;
        double Longitude;//经度
        double Latitude;//纬度
        double Altitude;//海拔高度
        double p, q;
        double N;
        a =  6378137.0;
        b =  6356752.31424518;
        c = Math.sqrt(((a * a) - (b * b)) / (a * a));
        d = Math.sqrt(((a * a) - (b * b)) / (b * b));
        p = Math.sqrt((x * x) + (y * y));
        q = Math.atan2((z * a), (p * b));
        Longitude = Math.atan2(y, x);
        Latitude = Math.atan2((z + (d * d) * b * Math.pow(Math.sin(q), 3)), (p - (c * c) * a * Math.pow(Math.cos(q), 3)));
        N = a / Math.sqrt(1 - ((c * c) * Math.pow(Math.sin(Latitude), 2)));
        Altitude = (p / Math.cos(Latitude)) - N;
        Longitude = Longitude * 180.0 / Math.PI;
        Latitude = Latitude * 180.0 / Math.PI;
        return Longitude + "," + Latitude + "," + Altitude;
    }