接口访问-并返回json字符串

String requestUrl = "http://www.kuaidi100.com/query?type="+express2.getCode()+"&postid="+express2.getExpress_number();
??JSONObject jsonObject = null;
??????StringBuffer buffer = new StringBuffer();
???????try {

???????????URL url = new URL(requestUrl);
???????????// http协议传输
???????????HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection();

???????????httpUrlConn.setDoOutput(true);
???????????httpUrlConn.setDoInput(true);
???????????httpUrlConn.setUseCaches(false);
???????????// 设置请求方式（GET/POST）
???????????httpUrlConn.setRequestMethod("POST");
???????????httpUrlConn.connect();
???????????// 将返回的输入流转换成字符串
???????????InputStream inputStream = httpUrlConn.getInputStream();
???????????InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
???????????BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

String str = null;

???????????while ((str = bufferedReader.readLine()) != null) {
???????????????buffer.append(str);
???????????}
???????????bufferedReader.close();
???????????inputStreamReader.close();
???????????// 释放资源
???????????inputStream.close();
???????????inputStream = null;
???????????httpUrlConn.disconnect();
???????????jsonObject = JSONObject.fromObject(buffer.toString());
???????} catch (Exception e) {
???????????e.printStackTrace();
???????}
if(jsonObject.get("message").equals("ok")){
map.put("expressInfos", jsonObject.get("data"));
}