根据经纬度和半径计算经纬度范围

代码不多说了，都是从网上copy的

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public class LatLonUtil {private static final double PI = 3.14159265;    private static final double EARTH_RADIUS = 6378137;    private static final double RAD = Math.PI / 180.0;    //@see http://snipperize.todayclose.com/snippet/php/SQL-Query-to-Find-All-Retailers-Within-a-Given-Radius-of-a-Latitude-and-Longitude--65095/ //The circumference of the earth is 24,901 miles.    //24,901/360 = 69.17 miles / degree      /**     * @param raidus 单位米     * return minLat,minLng,maxLat,maxLng     */    public static double[] getAround(double lat,double lon,int raidus){Double latitude = lat;Double longitude = lon;Double degree = (24901*1609)/360.0;double raidusMile = raidus;Double dpmLat = 1/degree;Double radiusLat = dpmLat*raidusMile;Double minLat = latitude - radiusLat;Double maxLat = latitude + radiusLat;Double mpdLng = degree*Math.cos(latitude * (PI/180));Double dpmLng = 1 / mpdLng;Double radiusLng = dpmLng*raidusMile;Double minLng = longitude - radiusLng;Double maxLng = longitude + radiusLng;//System.out.println("["+minLat+","+minLng+","+maxLat+","+maxLng+"]");return new double[]{minLat,minLng,maxLat,maxLng};}        /**     * 根据两点间经纬度坐标（double值），计算两点间距离，单位为米     * @param lng1     * @param lat1     * @param lng2     * @param lat2     * @return     */    public static double getDistance(double lng1, double lat1, double lng2, double lat2)    {       double radLat1 = lat1*RAD;       double radLat2 = lat2*RAD;       double a = radLat1 - radLat2;       double b = (lng1 - lng2)*RAD;       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;    }public static void main(String[] args){Double lat1 = 34.264648;Double lon1 = 108.952736;int radius = 1000;//[34.25566276027792,108.94186385411045,34.27363323972208,108.96360814588955]getAround(lat1,lon1,radius);//911717.0   34.264648,108.952736,39.904549,116.407288double dis = getDistance(108.952736,34.264648,116.407288,39.904549); System.out.println(dis);}}

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一共有两个方法

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第一个是 根据提供的经度和纬度、以及半径，取得此半径内的最大最小经纬度

第二个就是根据提供的两个经纬度计算距离

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