高德地图与GPS经纬度转换

public class aMapToWGS {

private final static double a=6378245.0;
private final static double pi=3.14159265358979324;
private final static double ee=0.00669342162296594626;

//gcj-02  to  wgs-84
public static LatLonPoint toWGS84Point(double latitude,double longitude){
LatLonPoint dev=calDev(latitude, longitude);
double retLat = latitude-dev.getLatitude();
double retLon=longitude-dev.getLongitude();
dev=calDev(retLat, retLon);
retLat=latitude-dev.getLatitude();
retLon=longitude-dev.getLongitude();

return new LatLonPoint(retLat, retLon);

}

//wsg84 to  gcj02
public static LatLonPoint toGCJ02Piont(double latitude,double longitude){
LatLonPoint dev=calDev(latitude, longitude);
double retLat = latitude-dev.getLatitude();
double retLon=longitude-dev.getLongitude();
return new LatLonPoint(retLat, retLon);

}

private static LatLonPoint calDev(double wgLat,double wgLon){
if(isOutofChina(wgLat,wgLon)){
return new LatLonPoint(0,0);
}
double dLat=calLat(wgLon-105.0,wgLat-35.0);
double dLon=calLon(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);
return new LatLonPoint(dLat,dLon);
}

private static double calLat(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;
}

private static double calLon(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;

}

private static boolean isOutofChina(double lat, double lon) {
if(lon<72.004 || lon>137.8347){
return true;
}
if(lat<0.8293 || lat>55.8271){
return true;
}

return false;
}

}