java实现高德与百度之间的坐标转换

package order.utils;

import java.math.BigDecimal;
import java.util.HashMap;
import java.util.Map;

public class MapUtils {
    /*GCJ-02(火星坐标) 和 BD-09 （百度坐标）
     *    算法代码如下，其中 bd_encrypt 将 GCJ-02 坐标转换成 BD-09 坐标， bd_decrypt 反之。
     */
    static double x_pi = 3.14159265358979324 * 3000.0 / 180.0; 
    public static void main(String[] args) {
//        --高德 119.254356  26.080030  
//        --百度 119.260989  26.086051
        bdEncrypt(26.061317,119.276413);
//        119.2608552145561
//        26.086114589896383 
    }
        //高德转百度
    public static Map<String,Float> bdEncrypt(double gg_lat, double gg_lon){
        Map<String,Float> data = new HashMap<String,Float>();
        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);
        double bd_lon = z * Math.cos(theta) + 0.0065;
        double bd_lat = z * Math.sin(theta) + 0.006;
        System.out.println(bd_lon+","+bd_lat);
        System.out.println(new BigDecimal(String.valueOf(bd_lon)).floatValue()+","+new BigDecimal(String.valueOf(bd_lat)).floatValue());
        data.put("lon", new BigDecimal(String.valueOf(bd_lon)).floatValue());
        data.put("lat",new BigDecimal(String.valueOf(bd_lat)).floatValue());
        return data;
    }
     
    public static Map<String,Double> bd_decrypt(double bd_lat, double bd_lon){
        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);
        double gg_lon = z * Math.cos(theta);
        double gg_lat = z * Math.sin(theta);
        Map<String,Double> data = new HashMap<String,Double>();
        data.put("lon", gg_lon);
        data.put("lat", gg_lat);
        return data;
    }
}