/**
* GPS坐標轉換為百度地圖坐標
* 需要引入javabase64.jar 和json的一些包
*
*/
public class Gps2BaiDu
{
public static void main(String[] args)
{
//轉換前的GPS坐標
double x=116.397428;
double y=39.90923;
//google 坐標轉百度鏈接 //http://api.map.baidu.com/ag/coord/convert?from=2&to=4&x=116.32715863448607&y=39.990912172420714&callback=BMap.Convertor.cbk_3694
//gps坐標的type=0
//google坐標的type=2
//baidu坐標的type=4
String path = "http://api.map.baidu.com/ag/coord/convert?from=0&to=4&x="+x+"+&y="+y+"&callback=BMap.Convertor.cbk_7594";
try
{
//使用http請求獲取轉換結果
URL url = new URL(path);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setConnectTimeout(5 * 1000);
InputStream inStream = conn.getInputStream();
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = 0;
while ((len = inStream.read(buffer)) != -1)
{
outStream.write(buffer, 0, len);
}
//得到返回的結果
String res = outStream.toString();
System.out.println(res);
//處理結果
if (res.indexOf("(") > 0 && res.indexOf(")") > 0)
{
String str = res.substring(res.indexOf("(") + 1, res.indexOf(")"));
String err = res.substring(res.indexOf("error") + 7, res.indexOf("error") + 8);
if ("0".equals(err))
{
JSONObject js = JSONObject.fromObject(str);
//編碼轉換
String x1 = new String(Base64.decode(js.getString("x")));
String y1 = new String(Base64.decode(js.getString("y")));
System.out.println(x1 + " " + y1);
}
}
} catch (Exception e)
{
e.printStackTrace();
}
}
}