package com.xzx.gc.common.utils;
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import lombok.extern.slf4j.Slf4j;
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/**
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* 距离查询工具
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*/
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@Slf4j
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public class LocationUtils {
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private static double EARTH_RADIUS = 6378.137;
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private static double rad(double d) {
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return d * Math.PI / 180.0;
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}
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/**
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* 通过经纬度获取距离(单位：米)
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*
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* @param lat1
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* @param lng1
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* @param lat2
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* @param lng2
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* @return
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*/
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public static double getDistance(double lat1, double lng1, double lat2,
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double lng2) {
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double radLat1 = rad(lat1);
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double radLat2 = rad(lat2);
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double a = radLat1 - radLat2;
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double b = rad(lng1) - rad(lng2);
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double s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2)
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+ Math.cos(radLat1) * Math.cos(radLat2)
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* Math.pow(Math.sin(b / 2), 2)));
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s = s * EARTH_RADIUS;
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s = Math.round(s * 10000d) / 10000d;
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s = s * 1000;
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log.debug("开始计算2点距离，第一点经度：{},纬度：{}，第二点经度：{}，纬度：{},距离{}公里",lng1,lat1,lng2,lat2,s/1000);
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return s;
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}
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public static void main(String[] args) {
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double distance = getDistance(28.16652, 112.937054, 28.169813, 112.929074);
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System.out.println(distance);
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}
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}
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