根據經緯度查詢最近距離，mysql查詢經緯度附近范圍

public class Test{

    private static List<LocalAddress> ilist = new ArrayList<LocalAddress>();
    public static void main(String[] args) {
        Test test3 = new Test();
        Double localDouble  = 0.0;

        //定義一個二維數組存放經緯度
        Double[][] doubles = {
                { 22.6036906766, 113.8793209706 }, //雍華源
                { 22.5205569549, 113.9394272419 }, //西海灣花園
                { 22.6494305358, 114.0411629507 }, //世紀春城4期
                { 22.5255080247,114.0384880750 },  //金海灣花園
                { 22.5246432654,114.0720634923 },   //金港豪庭
                { 22.5963291708,113.9689558477 },   //得意名居
                { 22.5509638661,113.9358124450 },   //麒麟花園A區西門
                { 22.5509638661,113.9358124450 },   //麒麟花園A區北門
                { 22.5254496086,114.0555439122 },   //裕康時尚名居
                { 22.7789489191,114.3063672776 },   //桑泰丹華園
                { 22.5240537775,114.0641924822 },   //皇庭彩園
                { 22.5141408858,114.0624887496 } }; //城市3米6

        //門店的經緯度
        Double[] initlocal = {22.539899298946577,113.95296375395431 };


        for (int i = 0; i < doubles.length; i++) {
            System.out.println("doubles.length==============="+doubles.length);
            System.out.println("(" + doubles[i][0] + "," + doubles[i][1] + ")");
            Double z = test3.getDistance(doubles[i][0], doubles[i][1],initlocal[0], initlocal[1]);
            System.out.println(z);
            //獲取最短距離后把經緯度和距離存放到對象中
            LocalAddress localaddress = new LocalAddress(doubles[i][0], doubles[i][1], z);
            //將對象用list保存
            ilist.add(localaddress);
        }

        List<LocalAddress> shotlocal =  getLocalList();
        Double lat=shotlocal.get(0).getLat();
        Double lon= shotlocal.get(0).getLon();
        localDouble = shotlocal.get(0).getDistance();
        System.err.println("最近的距離：" + localDouble + "。對應的經緯是：" +"(" + lat + "," + lon + ")");
    }

    /*第一種求最近距離 ===================================================*/
    /**
     * 獲取最短的距離
     * @param lat
     * @param lon
     * @param initlat
     * @param initlon
     * @return
     */
    public Double GetShotLocal(Double lat, Double lon, Double initlat,Double initlon) {
        Double x = (initlat - lat) * (initlat - lat);
        Double y = (initlon - lon) * (initlon - lon);
        Double z = Math.sqrt(x + y);
        return z;
    }

    /**
     * 對List<LocalAddress> 進行排序
     * @return
     */
    public static List<LocalAddress> getLocalList()  {
        Collections.sort(ilist, new Comparator<LocalAddress>() {
            @Override
            public int compare(LocalAddress arg0, LocalAddress  arg1) {
                Double double1 = arg0.getDistance();
                Double double2 = arg1.getDistance();
                if(double1>double2){
                    return 1;
                }else if (double1 == double2) {
                    return 0;
                }else {
                    return -1;
                }
            }
        });
        return ilist;
    }

/*    第二種求最近距離                         ==================================================================*/
    private static final double EARTH_RADIUS = 6378.137;//地球半徑,單位千米
    private static double rad(double d)
    {
        return d * Math.PI / 180.0;
    }

    /**
     *
     * @param lat1 第一個緯度
     * @param lng1 第一個經度
     * @param lat2 第二個緯度
     * @param lng2 第二個經度
     * @return 兩個經緯度的距離
     */
    public static double getDistance(double lat1,double lng1,double lat2,double lng2)
    {
        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 * 10000) / 10000;
        return s;

    }



}


entity

public class LocalAddress {

    private Double lat;     //緯度
    private Double lon;     //經度
    private Double distance;    //最近距離

    public LocalAddress() {
        // TODO Auto-generated constructor stub
    }

    public LocalAddress(Double lat, Double lon, Double distance) {
        super();
        this.lat = lat;
        this.lon = lon;
        this.distance = distance;
    }
    
}

<!--根據經緯度查詢最近距離范圍-->
<select id="SelectDistanceByLat" parameterType="map" resultType="map">
   SELECT
   *,(
   6371 * acos (
   cos ( radians(#{lat}) )
   * cos( radians( lat ) )
   * cos( radians( lng ) - radians(#{lng}) )
   + sin ( radians(#{lat}) )
   * sin( radians( lat ) )
   )
   ) AS distance
   FROM machine
   HAVING   3 > distance
   ORDER BY distance
   LIMIT 0 , 20;
</select>