package com.matrix.system.common.tools;
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public class LocationUtil {
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private static final 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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* 根据两个位置的经纬度，来计算两地的距离（单位为M）
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* 参数为double类型
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* locX 当前位置经度
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* locY 当前位置纬度
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* shopX 店铺位置经度
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* shopY 店铺位置纬度
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*/
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public static double getDistance(double locX, double locY, double shopX, double shopY) {
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double a, b, d, sa2, sb2;
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locY = rad(locY);
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shopY = rad(shopY);
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a = locY - shopY;
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b = rad(locX - shopX);
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sa2 = Math.sin(a / 2.0);
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sb2 = Math.sin(b / 2.0);
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d = 2 * EARTH_RADIUS
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* Math.asin(Math.sqrt(sa2 * sa2 + Math.cos(locY)
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* Math.cos(shopY) * sb2 * sb2));
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return d;
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}
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public static void main(String[] args) {
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// 112.886891,28.222562,114.061937,22.626003 -- 634093.3209722887
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// 113.930692,22.939454 -- 597367.3546527711
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System.out.println(getDistance(112.886891d, 28.222562d, 113.930692, 22.939454));
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}
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}
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