知道两个点的经纬度计算两个点的距离

经纬度首先转化为弧度

然后使用公式即可

    private     static double EARTH_RADIUS=6378.137;
    private static double rad(double d) {
            return d*Math.PI/180.0;
    }
    public static double getDistance(double latitude1,double longitude1,double latitude2, double longitude2 ) {
        double distance=0;
        double radLatitude1=rad(latitude1);
        double radLatitude2=rad(latitude2);
        double dis1=radLatitude1-radLatitude2;
        double dis2=rad(longitude1)-rad(longitude2);
        distance=2*Math.asin(Math.sqrt(Math.pow(Math.sin(dis1/2), 2)+Math.cos(radLatitude1)*Math.cos(radLatitude2)*Math.pow(Math.sin(dis2/2), 2)));
        distance=distance*EARTH_RADIUS;
        distance=Math.round(distance*10000d)/10000d;
        distance=distance*1000;
        return distance;
    }
    public static double getDistance2(double x1,double y1,double x2,double y2 ) {
        double distance=0;
        distance=Math.sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
        return distance;
    }