public class MapDistance {
private final static double PI = 3.14159265358979323; // 圆周率
private final static double R = 6371229; // 地球的半径
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;
//System.out.println((Math.hypot(x, y) / 1000));
//distance = Double.parseDouble(String.format("%.0f", Math.hypot(x, y) / 1000));
distance = (Math.hypot(x, y) / 1000);
return distance;
}
public static void main(String[] args) {
System.out.println(getDistance(40.137004,116.394765, 116.337795,39.977523));
}
}