/**
* 根据两地经纬度，计算两地距离
*
* @author Administrator
*
*/
public class Distance {
/** 地球半径，以米(m)为计算单位 */
private static final double EARTH_RADIUS = 6378137.0;
public static void main(String[] args) {
double lo1 = 108.90, la1 = 34.1;// 第一个经纬度
double lo2 = 115.4648060, la2 = 38.8738910;// 第二个经纬度
System.out.println("经纬度结果:" + getDistance(lo1, la1, lo2, la2));
System.out.println("经纬度结果:" + getDistance(0, 0, 0, 0));
System.out.println("地球周长：" + 2 * Math.PI * EARTH_RADIUS);
}
// 返回单位是米
public static double getDistance(double longitude1, double latitude1,
double longitude2, double latitude2) {
double Lat1 = rad(latitude1);
double Lat2 = rad(latitude2);
double a = Lat1 - Lat2;
double b = rad(longitude1) - rad(longitude2);
double s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2)
+ Math.cos(Lat1) * Math.cos(Lat2)
* Math.pow(Math.sin(b / 2), 2)));
s = s * EARTH_RADIUS;
s = Math.round(s * 10000) / 10000;
return s;
}
/** 求弧度大小 */
private static double rad(double d) {
return d * Math.PI / 180.0;
}
}