package com.hjb.util;import java.util.HashMap;import java.util.Map;public class BaiduMapstoAutoNaviMapUtils {    static double pi = 3.14159265358979324;    static double a = 6378245.0;    static double ee = 0.00669342162296594323;    static double x_pi = 3.14159265358979324 * 3000.0 / 180.0;    // World Geodetic System ==> Mars Geodetic System    public static Map<String, String> transform(double wgLat, double wgLon) {        Map<String, String> resultMap = new HashMap<String, String>();        double mgLat = 0;        double mgLon = 0;        if (outOfChina(wgLat, wgLon)) {            mgLat = wgLat;            mgLon = wgLon;            resultMap.put("mgLat", String.valueOf(mgLat));            resultMap.put("mgLon", String.valueOf(mgLon));            return resultMap;        }        double dLat = transformLat(wgLon - 105.0, wgLat - 35.0);        double dLon = transformLon(wgLon - 105.0, wgLat - 35.0);        double radLat = wgLat / 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);        dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);        mgLat = wgLat + dLat;        mgLon = wgLon + dLon;        resultMap.put("mgLat", String.valueOf(mgLat));        resultMap.put("mgLon", String.valueOf(mgLon));        return resultMap;    }    static boolean outOfChina(double lat, double lon) {        if (lon < 72.004 || lon > 137.8347)            return true;        if (lat < 0.8293 || lat > 55.8271)            return true;        return false;    }    static double transformLat(double x, double y) {        double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x));        ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;        ret += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0;        ret += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0;        return ret;    }    static double transformLon(double x, double y) {        double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x));        ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;        ret += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0;        ret += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0 * pi)) * 2.0 / 3.0;        return ret;    }    /**     * GCJ-02(火星坐标) 和 BD-09 （百度坐标）     * bd_encrypt 将 GCJ-02 坐标转换成 BD-09 坐标， bd_decrypt 反之。     * @param bd_lat     * @param bd_lon     * @param gg_lat     * @param gg_lon     */    public static Map<String, String>  bd_encrypt(double gg_lat, double gg_lon)    {        Map<String, String> resultMap = new HashMap<String,String>();        double bd_lat = 0;        double bd_lon = 0;        double x = gg_lon, y = gg_lat;        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);        bd_lon = z * Math.cos(theta) + 0.0065;        bd_lat = z * Math.sin(theta) + 0.006;        resultMap.put("mgLat", String.valueOf(bd_lat));        resultMap.put("mgLon", String.valueOf(bd_lon));        return resultMap;    }    /**     * GCJ-02(火星坐标) 和 BD-09 （百度坐标）     * bd_encrypt 将 GCJ-02 坐标转换成 BD-09 坐标， bd_decrypt 反之。     * @param bd_lat     * @param bd_lon     * @param gg_lat     * @param gg_lon     */    public static Map<String, String>  bd_decrypt(double bd_lat, double bd_lon){        Map<String, String> resultMap = new HashMap<String,String>();         double gg_lat = 0;          double gg_lon = 0;        double x = bd_lon - 0.0065, 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);        gg_lon = z * Math.cos(theta);        gg_lat = z * Math.sin(theta);        resultMap.put("mgLat", String.valueOf(gg_lat));        resultMap.put("mgLon", String.valueOf(gg_lon));        return resultMap;    }}