从google的json接口获取地理位置信息的Java代码
google 提供了公开的接口，通过，这个接口，根据gps或基站信息或wifi热点信息来获取当前位置的地理信息.
gps信息是经纬度，基站信息是基站的cellid等信息，wifi热点信息是wifi的mac地址是热点名字，信号强度等。
因此可以通过java程序获取相应信息，在LBS项目中可以用上：
api接口定义描述在：
http://code.google.com/p/gears/wiki/GeolocationAPI
Java代码如下：
[code]
package com.lizongbo.geo;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.URL;
import com.lizongbo.org.json.JSONArray;
import com.lizongbo.org.json.JSONException;
import com.lizongbo.org.json.JSONObject;
/**
* 从google的json接口获取地理位置信息的代码
*
* @author lizongbo
*
*/
public class GeoTest {
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
String url = "http://www.google.com/loc/json";
JSONObject json = new JSONObject();
json.put("version", "1.1.0");
json.put("host", "maps.618119.com");
json.put("home_mobile_country_code", 460);// 国家代码
json.put("home_mobile_network_code", 0);// 移动运营商代码
json.put("radio_type", "gsm");
json.put("carrier", "lizongbo");
json.put("request_address", true);
json.put("address_language", "zh_CN");
JSONArray jsoncells = new JSONArray();
json.put("cell_towers", jsoncells);
JSONArray jsonwifis = new JSONArray();
json.put("wifi_towers", jsonwifis);
JSONObject jsoncell = new JSONObject();
jsoncell.put("mobile_country_code", 460);// 国家代码,mcc
jsoncell.put("mobile_network_code", 0);// 移动运营商代码,mnc
jsoncell.put("location_area_code", 9364);// 位置区域代码,lac
jsoncell.put("cell_id", "3851");// 移动基站id
// jsoncell.put("age", 0);
// jsoncell.put("signal_strength", -70);
// jsoncell.put("timing_advance", 7777);
jsoncells.put(jsoncell);
JSONObject jsonwifi = new JSONObject();
// jsonwifi.put("mac_address", "00-11-22-33-44-55");
// jsonwifi.put("signal_strength", 8);
// jsonwifi.put("age", 0);
// jsonwifis.put(jsonwifi);
// jsonwifi = new JSONObject();
jsonwifi.put("mac_address", "00-55-44-33-22-11");//
jsonwifi.put("ssid", "TPLINK_618119");// 无线路由器的名字
jsonwifi.put("signal_strength", 8);// 信号强度
jsonwifi.put("age", 0);
// jsonwifis.put(jsonwifi);
System.out.println(json.toString());
System.out.println(downloadUrlbyPOST(url, json.toString(), null,
"UTF-8"));
}
public static String downloadUrlbyPOST(String urlStr, String query,
String referer, String encoding) throws Exception {
String line = "";
StringBuilder sb = new StringBuilder();
HttpURLConnection httpConn = null;
try {
URL url = new URL(urlStr);
System.out.println(urlStr + "?" + query);
Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(
"proxy.lizongbo.com", 8080));
proxy = Proxy.NO_PROXY;
httpConn = (HttpURLConnection) url.openConnection(proxy);
httpConn.setDoInput(true);
httpConn.setDoOutput(true);
httpConn.setRequestMethod("POST");
if (referer != null) {
httpConn.setRequestProperty("Referer", referer);
}
httpConn.setConnectTimeout(5000);
// httpConn.getOutputStream().write(
// java.net.URLEncoder.encode(query, "UTF-8").getBytes());
httpConn.getOutputStream().write(query.getBytes());
httpConn.getOutputStream().flush();
httpConn.getOutputStream().close();
BufferedReader in = null;
if (httpConn.getResponseCode() != 200) {
System.err.println("error:" + httpConn.getResponseMessage());
in = new BufferedReader(new InputStreamReader(httpConn
.getErrorStream(), "UTF-8"));
} else {
in = new BufferedReader(new InputStreamReader(httpConn
.getInputStream(), "UTF-8"));
}
while ((line = in.readLine()) != null) {
sb.append(line).append('\n');
}
// 关闭连接
httpConn.disconnect();
return sb.toString();
} catch (Exception e) {
// 关闭连接
httpConn.disconnect();
System.out.println(e.getMessage());
throw e;
}
}
}
[/code]
运行结果如下：
{“address_language”:”zh_CN”,”wifi_towers”:[],”host”:”maps.618119.com”,”radio_type”:”gsm”,”home_mobile_country_code”:9364,”carrier”:”lizongbo”,”home_mobile_network_code”:460,”cell_towers”:[{"mobile_network_code":0,"cell_id":"3851","mobile_country_code":460,"location_area_code":9364}],”request_address”:true,”version”:”1.1.0″}
http://www.google.com/loc/json?{“address_language”:”zh_CN”,”wifi_towers”:[],”host”:”maps.618119.com”,”radio_type”:”gsm”,”home_mobile_country_code”:9364,”carrier”:”lizongbo”,”home_mobile_network_code”:460,”cell_towers”:[{"mobile_network_code":0,"cell_id":"3851","mobile_country_code":460,"location_area_code":9364}],”request_address”:true,”version”:”1.1.0″}
{“location”:{“latitude”:22.522185,”longitude”:113.925618,”address”:{“country”:”中国”,”country_code”:”CN”,”region”:”广东省”,”city”:”深圳市”,”street”:”滨海大道辅路”},”accuracy”:620.0},”access_token”:”2:618119:lizongbo”}
试了一下把无线路由器的mac地址发到 https://www.google.com/loc/json ，google果然返回很准的定位看来google是把我用手机测试定位的时候就把数据采集分析好了，确实强大。
Tags: cellid, geo, google, json, lbs, wifi