package com.doumee.core.utils;
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/**
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* Created by IntelliJ IDEA.
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*
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* @Author : Rk
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* @create 2025/7/15 9:57
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*/
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public class GeoUtils {
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// 将角度转换为弧度
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private static double toRadians(double angle) {
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return angle * Math.PI / 180.0;
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}
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// 计算两点间的距离（单位：公里）
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public static double haversineDistance(double lat1, double lon1, double lat2, double lon2) {
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// 将经纬度转换为弧度
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double dLat = toRadians(lat2 - lat1);
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double dLon = toRadians(lon2 - lon1);
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lat1 = toRadians(lat1);
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lat2 = toRadians(lat2);
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// 应用Haversine公式
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double a = Math.pow(Math.sin(dLat / 2), 2) + Math.pow(Math.sin(dLon / 2), 2) * Math.cos(lat1) * Math.cos(lat2);
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double c = 2 * Math.asin(Math.sqrt(a));
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// 地球半径，单位：公里
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int R = 6371;
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return R * c;
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}
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public static void main(String[] args) {
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double lat1 = 30.660622; // 纽约纬度
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double lon1 = 114.172; // 纽约经度
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double lat2 = 30.621857; // 洛杉矶纬度
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double lon2 = 114.12311; // 洛杉矶经度
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double distance = haversineDistance(lat1, lon1, lat2, lon2);
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System.out.printf("Distance: %.2f km%n", distance);
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}
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}
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