java 根據經緯度換算距離
阿新 • • 發佈：2018-11-01
public class GSUtil {
private static final double EARTH_RADIUS = 6378.137;
private static double rad(double d){
return d * Math.PI / 180.0;
}
/**
* 根據經緯度算距離
* @param long1
* @param lat1
* @param long2
* @param lat2
* @return
*/
public static double getmeter(double long1, double lat1, double long2, double lat2) {
double a, b, d, sa2, sb2;
lat1 = rad(lat1);
lat2 = rad(lat2);
a = lat1 - lat2;
b = rad(long1 - long2);
sa2 = Math.sin(a / 2.0);
sb2 = Math.sin(b / 2.0);
d = 2 * EARTH_RADIUS
* Math.asin(Math.sqrt(sa2 * sa2 + Math.cos(lat1)
* Math.cos(lat2) * sb2 * sb2));
d= d * 1000;
BigDecimal bg = new BigDecimal(d).setScale(2, RoundingMode.UP);
return bg.doubleValue();
}
public static void main(String[] args) {
System.out.println(getmeter(116.1426, 40.0422, 116.1327, 40.0421));
}
}