64 lines
1.7 KiB
Java
64 lines
1.7 KiB
Java
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package com.game;
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import com.taurus.core.util.StringUtil;
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/**
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* @author dong.teng
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*/
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public class GPSUtil {
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// 地球半径
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private static final double EARTH_RADIUS = 6378137;
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private static double radian(double lngLat) {
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return lngLat * Math.PI / 180.0;
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}
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/**
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* 根据两点间经纬度坐标,计算直线距离 单位 ：米
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*/
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public static double getDistance(String gps1, String gps2) {
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double distance = 0;
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if (isOpenGPS(gps1) && isOpenGPS(gps2)) {
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String[] gps1Arr = gps1.split(",");
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String[] gps2Arr = gps2.split(",");
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Double lat1 = Double.parseDouble(gps1Arr[1]);
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Double lng1 = Double.parseDouble(gps1Arr[0]);
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Double lat2 = Double.parseDouble(gps2Arr[1]);
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Double lng2 = Double.parseDouble(gps2Arr[0]);
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double radLat1 = radian(lat1);
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double radLat2 = radian(lat2);
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double a = radLat1 - radLat2;
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double b = radian(lng1) - radian(lng2);
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distance = 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)));
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distance *= EARTH_RADIUS;
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distance = Math.round(distance * 10000) / 10000;
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}
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return distance;
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}
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/**
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* 两位置是否过近
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*
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* @param gps1
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* @param gps2
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* @param measure
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* 衡量过近米
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* @return
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*/
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public static boolean isDistanceNear(String gps1, String gps2, int measure) {
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return getDistance(gps1, gps2) <= measure;
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}
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/**
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* 是否打开gps
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*/
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public static boolean isOpenGPS(String gps) {
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return StringUtil.isNotEmpty(gps) && gps.contains(",");
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}
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public static void main(String[] args) {
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System.out.println(isDistanceNear("109.19300079346,27.710248947144", "100.23030090332,25.59494972229",50));
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}
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}
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