进行坐标系转换使用下面的工具类，在网上找的，出处忘记了
地球坐标系——WGS84：常见于 GPS 设备，Google 地图等国际标准的坐标体系。
火星坐标系——GCJ-02：中国国内使用的被强制加密后的坐标体系，高德坐标就属于该种坐标体系。
百度坐标系——BD-09：百度地图所使用的坐标体系，是在火星坐标系的基础上又进行了一次加密处理。
public class GPSUtils {private static double x_pi = 3.14159265358979324 * 3000.0 / 180.0;// πprivate static double pi = 3.1415926535897932384626;// 长半轴private static double a = 6378245.0;// 扁率private static double ee = 0.00669342162296594323;public static boolean out_of_china(double lon, double lat) {if(lon < 72.004 || lon > 137.8347) {return true;} else if(lat < 0.8293 || lat > 55.8271) {return true;}return false;}public static double transformlat(double lon, double lat) {double ret = -100.0 + 2.0 * lon + 3.0 * lat + 0.2 * lat * lat + 0.1 * lon * lat + 0.2 * Math.sqrt(Math.abs(lon));ret += (20.0 * Math.sin(6.0 * lon * pi) + 20.0 * Math.sin(2.0 * lon * pi)) * 2.0 / 3.0;ret += (20.0 * Math.sin(lat * pi) + 40.0 * Math.sin(lat / 3.0 * pi)) * 2.0 / 3.0;ret += (160.0 * Math.sin(lat / 12.0 * pi) + 320 * Math.sin(lat * pi / 30.0)) * 2.0 / 3.0;return ret;}public static double transformlng(double lon, double lat) {double ret = 300.0 + lon + 2.0 * lat + 0.1 * lon * lon + 0.1 * lon * lat + 0.1 * Math.sqrt(Math.abs(lon));ret += (20.0 * Math.sin(6.0 * lon * pi) + 20.0 * Math.sin(2.0 * lon * pi)) * 2.0 / 3.0;ret += (20.0 * Math.sin(lon * pi) + 40.0 * Math.sin(lon / 3.0 * pi)) * 2.0 / 3.0;ret += (150.0 * Math.sin(lon / 12.0 * pi) + 300.0 * Math.sin(lon / 30.0 * pi)) * 2.0 / 3.0;return ret;}/*** WGS84转GCJ02(火星坐标系)** @param wgs_lon WGS84坐标系的经度* @param wgs_lat WGS84坐标系的纬度* @return 火星坐标数组*/public static double[] wgs84togcj02(double wgs_lon, double wgs_lat) {if (out_of_china(wgs_lon, wgs_lat)) {return new double[] { wgs_lon, wgs_lat };}double dlat = transformlat(wgs_lon - 105.0, wgs_lat - 35.0);double dlng = transformlng(wgs_lon - 105.0, wgs_lat - 35.0);double radlat = wgs_lat / 180.0 * pi;double magic = Math.sin(radlat);magic = 1 - ee * magic * magic;double sqrtmagic = Math.sqrt(magic);dlat = (dlat * 180.0) / ((a * (1 - ee)) / (magic * sqrtmagic) * pi);dlng = (dlng * 180.0) / (a / sqrtmagic * Math.cos(radlat) * pi);double mglat = wgs_lat + dlat;double mglng = wgs_lon + dlng;return new double[] { mglng, mglat };}/*** GCJ02(火星坐标系)转GPS84** @param gcj_lon 火星坐标系的经度* @param gcj_lat 火星坐标系纬度* @return WGS84坐标数组*/public static double[] gcj02towgs84(double gcj_lon, double gcj_lat) {if (out_of_china(gcj_lon, gcj_lat)) {return new double[] { gcj_lon, gcj_lat };}double dlat = transformlat(gcj_lon - 105.0, gcj_lat - 35.0);double dlng = transformlng(gcj_lon - 105.0, gcj_lat - 35.0);double radlat = gcj_lat / 180.0 * pi;double magic = Math.sin(radlat);magic = 1 - ee * magic * magic;double sqrtmagic = Math.sqrt(magic);dlat = (dlat * 180.0) / ((a * (1 - ee)) / (magic * sqrtmagic) * pi);dlng = (dlng * 180.0) / (a / sqrtmagic * Math.cos(radlat) * pi);double mglat = gcj_lat + dlat;double mglng = gcj_lon + dlng;return new double[] { gcj_lon * 2 - mglng, gcj_lat * 2 - mglat };}/*** 火星坐标系(GCJ-02)转百度坐标系(BD-09)** 谷歌、高德——>百度* @param gcj_lon 火星坐标经度* @param gcj_lat 火星坐标纬度* @return 百度坐标数组*/public static double[] gcj02tobd09(double gcj_lon, double gcj_lat) {double z = Math.sqrt(gcj_lon * gcj_lon + gcj_lat * gcj_lat) + 0.00002 * Math.sin(gcj_lat * x_pi);double theta = Math.atan2(gcj_lat, gcj_lon) + 0.000003 * Math.cos(gcj_lon * x_pi);double bd_lng = z * Math.cos(theta) + 0.0065;double bd_lat = z * Math.sin(theta) + 0.006;return new double[] { bd_lng, bd_lat };}/*** 百度坐标系(BD-09)转火星坐标系(GCJ-02)** 百度——>谷歌、高德* @param bd_lon 百度坐标纬度* @param bd_lat 百度坐标经度* @return 火星坐标数组*/public static double[] bd09togcj02(double bd_lon, double bd_lat) {double x = bd_lon - 0.0065;double y = bd_lat - 0.006;double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);double gg_lng = z * Math.cos(theta);double gg_lat = z * Math.sin(theta);return new double[] { gg_lng, gg_lat };}/*** WGS坐标转百度坐标系(BD-09)** @param wgs_lng WGS84坐标系的经度* @param wgs_lat WGS84坐标系的纬度* @return 百度坐标数组*/public static double[] wgs84tobd09(double wgs_lng, double wgs_lat) {double[] gcj = wgs84togcj02(wgs_lng, wgs_lat);double[] bd09 = gcj02tobd09(gcj[0], gcj[1]);return bd09;}/*** 百度坐标系(BD-09)转WGS坐标** @param bd_lng 百度坐标纬度* @param bd_lat 百度坐标经度* @return WGS84坐标数组*/public static double[] bd09towgs84(double bd_lng, double bd_lat) {double[] gcj = bd09togcj02(bd_lng, bd_lat);double[] wgs84 = gcj02towgs84(gcj[0], gcj[1]);return wgs84;}}