經緯度首先轉化為弧度

然後使用公式即可

 1     private     static double EARTH_RADIUS=6378.137;
 2     private static double rad(double d) {
 3             return d*Math.PI/180.0;
 4     }
 5     public static double getDistance(double latitude1,double longitude1,double latitude2, double longitude2 ) {
 6         double
 
 distance=0;
 7         double radLatitude1=rad(latitude1);
 8         double radLatitude2=rad(latitude2);
 9         double dis1=radLatitude1-radLatitude2;
10         double dis2=rad(longitude1)-rad(longitude2);
11         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)));
 
12         distance=distance*EARTH_RADIUS;
13         distance=Math.round(distance*10000d)/10000d;
14         distance=distance*1000;
15         return distance;
16     }
17     public static double getDistance2(double x1,double y1,double x2,double y2 ) {
18         double distance=0;
19         distance=Math.sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
 
20         return distance;
21     }
22