package com.nuvole.util;

/**
 * 计算坐标距离工具类
 *
 * @Author: lc
 * @Date: 2019/5/23 19:10
 */
public class DistanceUtil {

    private static double EARTH_RADIUS = 6378.137;

    private static double rad(double d) {
        return d * Math.PI / 180.0;
    }

    /**
     * 通过经纬度获取距离(单位：米)（腾讯坐标）
     *
     * @Author: lc
     * @Date: 2019/5/23 19:14
     */
    public static double getDistance(double lat1, double lng1, double lat2, double lng2) {
        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 * EARTH_RADIUS;
        s = Math.round(s * 10000d) / 10000d;
        s = s * 1000;
        return s;
    }

    public static void main(String[] args) {
        //金明源-杨金路34.844000,113.743560
        double distance = getDistance(34.844222, 113.743300, 34.844000, 113.743560);
        System.out.println("距离" + distance + "米");
    }


}