通过百度获取IP地址对应的经纬度

/**
* 获取指定IP对应的经纬度（为空返回当前机器经纬度）
* 
* @param ip
* @return
*/
public static String[] getIPXY(String ip) {

String ak = "百度申请的Key";
if (null == ip) {
ip = "";
}

try {

URL url = new URL("http://api.map.baidu.com/location/ip?ak=" + ak
+ "&ip=" + ip + "&coor=bd09ll");
InputStream inputStream = url.openStream();
InputStreamReader inputReader = new InputStreamReader(inputStream);
BufferedReader reader = new BufferedReader(inputReader);
StringBuffer sb = new StringBuffer();
String str;
do {
str = reader.readLine();
sb.append(str);
} while (null != str);


str = sb.toString();
if (null == str || str.isEmpty()) {
return null;
}


// 获取坐标位子
int index = str.indexOf("point");
int end = str.indexOf("}}", index);


if (index == -1 || end == -1) {
return null;
}


str = str.substring(index - 1, end + 1);
if (null == str || str.isEmpty()) {
return null;
}


String[] ss = str.split(":");
if (ss.length != 4) {
return null;
}


String x = ss[2].split(",")[0];
String y = ss[3];


x = x.substring(x.indexOf("\"") + 1, x.indexOf("\"", 1));
y = x.substring(y.indexOf("\"") + 1, y.indexOf("\"", 1));


return new String[] { x, y };


} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}


return null;
}