工具类：获取两个经纬度的距离(米)

kotlin

package com.zo.util

import org.gavaghan.geodesy.Ellipsoid
import org.gavaghan.geodesy.GeodeticCalculator
import org.gavaghan.geodesy.GlobalCoordinates

object CalculateDistanceUtil {

    // 获取两个经纬度的距离(米)
    fun getDistance(
        sourceLat: Double,
        sourceLng: Double,
        targetLat: Double,
        targetLng: Double,
        ellipsoid: Ellipsoid? = Ellipsoid.WGS84
    ): Double {
        val source = GlobalCoordinates(sourceLat, sourceLng)
        val target = GlobalCoordinates(targetLat, targetLng)
        //创建GeodeticCalculator，调用计算方法，传入坐标系、经纬度用于计算距离
        val geoCurve = GeodeticCalculator().calculateGeodeticCurve(ellipsoid, source, target)
        return geoCurve.ellipsoidalDistance
    }

    // 获取两个经纬度的距离(米)
    fun getDistanceMeter(
        gpsFrom: GlobalCoordinates,
        gpsTo: GlobalCoordinates,
        ellipsoid: Ellipsoid? = Ellipsoid.WGS84
    ): Double {
        val geoCurve = GeodeticCalculator().calculateGeodeticCurve(ellipsoid, gpsFrom, gpsTo);
        return geoCurve.ellipsoidalDistance
    }
}

java

1.反余弦计算方式：

private static final double EARTH_RADIUS = 6371000; // 平均半径,单位：m；不是赤道半径。赤道为6378左右
public static double getDistance(Double lat1,Double lng1,Double lat2,Double lng2) {
        // 经纬度（角度）转弧度。弧度用作参数，以调用Math.cos和Math.sin
        double radiansAX = Math.toRadians(lng1); // A经弧度
        double radiansAY = Math.toRadians(lat1); // A纬弧度
        double radiansBX = Math.toRadians(lng2); // B经弧度
        double radiansBY = Math.toRadians(lat2); // B纬弧度

        // 公式中“cosβ1cosβ2cos（α1-α2）+sinβ1sinβ2”的部分，得到∠AOB的cos值
        double cos = Math.cos(radiansAY) * Math.cos(radiansBY) * Math.cos(radiansAX - radiansBX)
                + Math.sin(radiansAY) * Math.sin(radiansBY);
//        System.out.println("cos = " + cos); // 值域[-1,1]
        double acos = Math.acos(cos); // 反余弦值
//        System.out.println("acos = " + acos); // 值域[0,π]
//        System.out.println("∠AOB = " + Math.toDegrees(acos)); // 球心角 值域[0,180]
        return EARTH_RADIUS * acos; // 最终结果
    }

2.利用第三方jar包计算：

<!--用于计算两点之间的距离-->
        <dependency>
            <groupId>org.gavaghan</groupId>
            <artifactId>geodesy</artifactId>
            <version>1.1.3</version>
        </dependency>

public static double getDistanceMeter(GlobalCoordinates gpsFrom, GlobalCoordinates gpsTo, Ellipsoid ellipsoid)
    {
        //创建GeodeticCalculator，调用计算方法，传入坐标系、经纬度用于计算距离
        GeodeticCurve geoCurve = new GeodeticCalculator().calculateGeodeticCurve(ellipsoid, gpsFrom, gpsTo);

        return geoCurve.getEllipsoidalDistance();
    }