我正在尝试使用HttpURLConnection执行post请求,但不知道如何正确执行.
我可以使用以下代码使用AndroidAsyncHttp客户端成功执行请求:
AsyncHttpClient httpClient = new AsyncHttpClient(); httpClient.addHeader("Content-type", "application/json"); httpClient.setUserAgent("GYUserAgentAndroid"); String jsonParamsString = "{\"key\":\"value\"}"; RequestParams requestParams = new RequestParams("request", jsonParamsString); httpClient.post("", requestParams, jsonHttpResponseHandler);
在桌面计算机上使用curl可以执行相同的请求:
curl -A "GYUserAgentAndroid" -d 'request={"key":"value"}' ''
这两种方法都给了我服务器的预期响应.
现在我想使用HttpURLConnection做同样的请求.问题是我不知道如何正确地做到这一点.我尝试过这样的事情:
URL url = new URL(""); HttpURLConnection httpUrlConnection = (HttpURLConnection) url.openConnection(); httpUrlConnection.setDoOutput(true); httpUrlConnection.setDoInput(true); httpUrlConnection.setRequestMethod("POST"); httpUrlConnection.setRequestProperty("User-Agent", "GYUserAgentAndroid"); httpUrlConnection.setRequestProperty("Content-Type", "application/json"); httpUrlConnection.setUseCaches (false); DataOutputStream outputStream = new DataOutputStream(httpUrlConnection.getOutputStream()); // what should I write here to output stream to post params to server ? outputStream.flush(); outputStream.close(); // get response InputStream responseStream = new BufferedInputStream(httpUrlConnection.getInputStream()); BufferedReader responseStreamReader = new BufferedReader(new InputStreamReader(responseStream)); String line = ""; StringBuilder stringBuilder = new StringBuilder(); while ((line = responseStreamReader.readLine()) != null) { stringBuilder.append(line); } responseStreamReader.close(); String response = stringBuilder.toString(); JSONObject jsonResponse = new JSONObject(response); // the response is not I'm expecting return jsonResponse;
如何正确地将与AsyncHttpClient和curl的工作示例中的数据相同的数据写入HttpURLConnection输出流?
提前致谢.
public String getJson(String url,JSONObject params){ try { URL _url = new URL(url); HttpURLConnection urlConn =(HttpURLConnection)_url.openConnection(); urlConn.setRequestMethod(POSTMETHOD); urlConn.setRequestProperty("Content-Type", "applicaiton/json; charset=utf-8"); urlConn.setRequestProperty("Accept", "applicaiton/json"); urlConn.setDoOutput(true); urlConn.connect(); BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(urlConn.getOutputStream())); writer.write(params.toString()); writer.flush(); writer.close(); if(urlConn.getResponseCode() == HttpURLConnection.HTTP_OK){ is = urlConn.getInputStream();// is is inputstream } else { is = urlConn.getErrorStream(); } } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } try { BufferedReader reader = new BufferedReader(new InputStreamReader( is, "UTF-8"), 8); StringBuilder sb = new StringBuilder(); String line = null; while ((line = reader.readLine()) != null) { sb.append(line + "\n"); } is.close(); response = sb.toString(); Log.e("JSON", response); } catch (Exception e) { Log.e("Buffer Error", "Error converting result " + e.toString()); } return response ; }