根據經緯度分別用Java和Oracle存儲過程計算兩點距離

在給定2點的經緯度，通過java代碼和Oracle存儲過程來計算出點的距離 單位是(米)

oracle存儲過程：

create or replace procedure SP_GET_DISTANCE 
(cx in number,cy in number,sx in number, sy in number,distance out varchar2) 
is 
d number; 
x number; 
y number; 
r number; 
pi number; 
begin 
--開始計算 
  r:=6371229;--地球半徑 
  pi:=3.14159265358979323;--圓周率 
  x:=(sx-cx)*pi*r*cos((sy+cy)/2*pi/180)/180; 
  y:=(sy-cy)*pi*r/180; 
  d:=SQRT(power(x,2)+power(y,2)); 
  distance:=to_char(d,9999999999999.99); 
end SP_GET_DISTANCE; 

java代碼：

package com.wpn.web.util; 
 
public class Distance { 
    private final static double PI = 3.14159265358979323;// 圓周率 
    private final static double R = 6371229;  // 地球的半徑 
 
    private Distance() { 
    } 
 
    /**
    * 緯度lat 經度lon
    * @param longt1
    * @param lat1
    * @param longt2
    * @param lat2
    * @return
    */ 
    public static double getDistance(double longt1, double lat1, double longt2, double lat2) { 
        double x, y, distance; 
        x = (longt2 - longt1) * PI * R * Math.cos(((lat1 + lat2) / 2) * PI / 180) / 180; 
        y = (lat2 - lat1) * PI * R / 180; 
        distance = Math.hypot(x, y); 
        return distance; 
    } 
 
    /*public enum GaussSphere {
        Beijing54, Xian80, WGS84,
    }
 
    private static double Rad(double d) {
        return d * Math.PI / 180.0;
    }
    public static double DistanceOfTwoPoints(double lng1, double lat1, double lng2, double lat2, GaussSphere gs) {
        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 * (gs == GaussSphere.WGS84 ? 6378137.0 : (gs == GaussSphere.Xian80 ? 6378140.0 : 6378245.0));
        s = Math.round(s * 10000) / 10000;
        return s;
    }*/ 
     
    public static void main(String[] arg){ 
        double longt1 = 116.515502; 
        double lat1 = 39.863898; 
        double longt2 = 116.304187; 
        double lat2 = 40.052584; 
        System.out.println(getDistance(longt1,lat1,longt2,lat2)); 
    } 
}