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经纬度距离计算
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``` | |
/** | |
* 根据经纬度计算距离 | |
* @author Johnnian | |
* | |
*/ | |
public class LocationUtils { | |
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) | |
* @param lng1 原经度 | |
* @param lat1 原纬度 | |
* @param lat2 目的纬度 | |
* @param lng2 目的经度 | |
* @return | |
*/ | |
public static double getDistance(double lng1, double lat1, double lng2, | |
double lat2) { | |
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; | |
} | |
} | |
``` |
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