经纬度距离计算Java实现代码

public class test {
    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 EARTH_RADIUS = 6378137;
        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;
    }
                      
    public static void main(String[] args) {
        System.out.println(GetDistance(30.396800, 111.422417, 30.397700, 111.422417));
    }
}

湖北宜都  

经度隔0.00105度，纬线上相隔100米

纬度隔0.00090度，经线上相隔100米

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