How to add parameters to HttpURLConnection using POST using NameValuePair

Question

I am trying to do POST with HttpURLConnection(I need to use it this way, can't use HttpPost) and I'd like to add parameters to that connection such as

post.setEntity(new UrlEncodedFormEntity(nvp));

where

nvp = new ArrayList<NameValuePair>();

having some data stored in. I can't find a way how to add this ArrayList to my HttpURLConnection which is here:

HttpsURLConnection https = (HttpsURLConnection) url.openConnection(); https.setHostnameVerifier(DO_NOT_VERIFY); http = https; http.setRequestMethod("POST"); http.setDoInput(true); http.setDoOutput(true);

The reason for that awkward https and http combination is the need for not verifying the certificate. That is not a problem, though, it posts the server well. But I need it to post with arguments.

Any ideas?

Duplicate Disclaimer:

Back in 2012, I had no idea how parameters were inserted into an HTTP POST request. I was hanging on to NameValuePair because it was in a tutorial. This question might seem like a duplicate, however, my 2012 self read that other question and it was NOT using NameValuePair. It did not, in fact, solve my problem.

If you have problem with posting params then below link may help you. stackoverflow.com/questions/2793150/… — Hitendra
– Hitendra, Commented Mar 19, 2012 at 9:51
String url = "example.com"; String charset = "UTF-8"; String param1 = "value1"; String param2 = "value2"; // ... String query = String.format("param1=%s&param2=%s", URLEncoder.encode(param1, charset), URLEncoder.encode(param2, charset)); you can make a query string instead of using NameValuePair List. — Hitendra
– Hitendra, Commented Mar 19, 2012 at 10:06
"I need to use it this way, can't use HttpPost" that's why i have suggested this else answer posted by Manikandan works fine. — Hitendra
– Hitendra, Commented Mar 19, 2012 at 10:33
Possible duplicate of Java - sending HTTP parameters via POST method easily — rogerdpack
– rogerdpack, Commented May 24, 2018 at 17:56
It was because "many of the answers" here were the same as the answers to that question. But now I see that it's a different question, thanks for the clarification :) — rogerdpack
– rogerdpack, Commented May 25, 2018 at 13:53

Michel Ayres · Accepted Answer · 2014-02-24 12:25:13Z

You can get output stream for the connection and write the parameter query string to it.

URL url = new URL("http://yoururl.com"); HttpsURLConnection conn = (HttpsURLConnection) url.openConnection(); conn.setReadTimeout(10000); conn.setConnectTimeout(15000); conn.setRequestMethod("POST"); conn.setDoInput(true); conn.setDoOutput(true); List<NameValuePair> params = new ArrayList<NameValuePair>(); params.add(new BasicNameValuePair("firstParam", paramValue1)); params.add(new BasicNameValuePair("secondParam", paramValue2)); params.add(new BasicNameValuePair("thirdParam", paramValue3)); OutputStream os = conn.getOutputStream(); BufferedWriter writer = new BufferedWriter( new OutputStreamWriter(os, "UTF-8")); writer.write(getQuery(params)); writer.flush(); writer.close(); os.close(); conn.connect();

...

private String getQuery(List<NameValuePair> params) throws UnsupportedEncodingException { StringBuilder result = new StringBuilder(); boolean first = true; for (NameValuePair pair : params) { if (first) first = false; else result.append("&"); result.append(URLEncoder.encode(pair.getName(), "UTF-8")); result.append("="); result.append(URLEncoder.encode(pair.getValue(), "UTF-8")); } return result.toString(); }

NameValuePair can be substitued with AbstractMap's SimpleEntry too. See this page: stackoverflow.com/questions/2973041/a-keyvaluepair-in-java
Here are the imports if you're unsure. import org.apache.http.NameValuePair; import org.apache.http.message.BasicNameValuePair;
For best performance, you should call either setFixedLengthStreamingMode(int) when the body length is known in advance, or setChunkedStreamingMode(int) when it is not. Otherwise HttpURLConnection will be forced to buffer the complete request body in memory before it is transmitted, wasting (and possibly exhausting) heap and increasing latency.
NameValuePair is deprecated in Api 22, check my answer stackoverflow.com/a/29561084/4552938
Maybe you can use raw mode when building URL object, something like this: URL url = new URL("http://yoururl.com?k1=v1&k2=v2&···&kn=vn"); then when set conn to use POST method don't need to write them.

Fahim · Accepted Answer · 2015-10-02 02:38:47Z

Since the NameValuePair is deprecated. Thought of sharing my code

public String performPostCall(String requestURL, HashMap<String, String> postDataParams) { URL url; String response = ""; try { url = new URL(requestURL); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setReadTimeout(15000); conn.setConnectTimeout(15000); conn.setRequestMethod("POST"); conn.setDoInput(true); conn.setDoOutput(true); OutputStream os = conn.getOutputStream(); BufferedWriter writer = new BufferedWriter( new OutputStreamWriter(os, "UTF-8")); writer.write(getPostDataString(postDataParams)); writer.flush(); writer.close(); os.close(); int responseCode=conn.getResponseCode(); if (responseCode == HttpsURLConnection.HTTP_OK) { String line; BufferedReader br=new BufferedReader(new InputStreamReader(conn.getInputStream())); while ((line=br.readLine()) != null) { response+=line; } } else { response=""; } } catch (Exception e) { e.printStackTrace(); } return response; }

....

 private String getPostDataString(HashMap<String, String> params) throws UnsupportedEncodingException{ StringBuilder result = new StringBuilder(); boolean first = true; for(Map.Entry<String, String> entry : params.entrySet()){ if (first) first = false; else result.append("&"); result.append(URLEncoder.encode(entry.getKey(), "UTF-8")); result.append("="); result.append(URLEncoder.encode(entry.getValue(), "UTF-8")); } return result.toString(); }

If your compileSdkVersion is 23(Marshmallow) you no longer can use NameValuePair because they removed the library. I was fearing that migration was going to be a pain but your solution saved me a lot of time. Thank you.
That works great, but why does the response have double quotes, like ""result"" ?
Did any of you had a problem with this line OutputStream os = conn.getOutputStream(); on jelly bean regarding no address associated with hostname?
Thanks for sharing your code. Even Android developer website doesn't offer a solution.

dakshbhatt21 · Accepted Answer · 2015-06-19 07:49:27Z

If you don't need the ArrayList<NameValuePair> for parameters, this is a shorter solution that builds the query string using the Uri.Builder class:

URL url = new URL("http://yoururl.com"); HttpsURLConnection conn = (HttpsURLConnection) url.openConnection(); conn.setReadTimeout(10000); conn.setConnectTimeout(15000); conn.setRequestMethod("POST"); conn.setDoInput(true); conn.setDoOutput(true); Uri.Builder builder = new Uri.Builder() .appendQueryParameter("firstParam", paramValue1) .appendQueryParameter("secondParam", paramValue2) .appendQueryParameter("thirdParam", paramValue3); String query = builder.build().getEncodedQuery(); OutputStream os = conn.getOutputStream(); BufferedWriter writer = new BufferedWriter( new OutputStreamWriter(os, "UTF-8")); writer.write(query); writer.flush(); writer.close(); os.close(); conn.connect();

this should be an answer, as no re-inventing of the wheel must be done!
how to upload filebody in appendqueryparameter for images and all
@Krups I think your problem is different from this, try to look for sending JSON object using POST

Pang · Accepted Answer · 2018-03-15 03:29:05Z

One solution is to make your own params string.

This is the actual method I've been using for my latest project. You need to change args from hashtable to namevaluepair's:

private static String getPostParamString(Hashtable<String, String> params) { if(params.size() == 0) return ""; StringBuffer buf = new StringBuffer(); Enumeration<String> keys = params.keys(); while(keys.hasMoreElements()) { buf.append(buf.length() == 0 ? "" : "&"); String key = keys.nextElement(); buf.append(key).append("=").append(params.get(key)); } return buf.toString(); }

POSTing the params:

OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream()); writer.write(getPostParamString(req.getPostParams()));

Samuel · Accepted Answer · 2012-08-16 14:40:59Z

I think I found exactly what you need. It may help others.

You can use the method UrlEncodedFormEntity.writeTo(OutputStream).

UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nvp); http.connect(); OutputStream output = null; try { output = http.getOutputStream(); formEntity.writeTo(output); } finally { if (output != null) try { output.close(); } catch (IOException ioe) {} }

wojciii · Accepted Answer · 2015-09-04 09:08:46Z

The accepted answer throws a ProtocolException at:

OutputStream os = conn.getOutputStream();

because it does not enable the output for the URLConnection object. The solution should include this:

conn.setDoOutput(true);

to make it work.

BNK · Accepted Answer · 2015-12-08 01:22:40Z

If it's not too late, I'd like to share my code

Utils.java:

public static String buildPostParameters(Object content) { String output = null; if ((content instanceof String) || (content instanceof JSONObject) || (content instanceof JSONArray)) { output = content.toString(); } else if (content instanceof Map) { Uri.Builder builder = new Uri.Builder(); HashMap hashMap = (HashMap) content; if (hashMap != null) { Iterator entries = hashMap.entrySet().iterator(); while (entries.hasNext()) { Map.Entry entry = (Map.Entry) entries.next(); builder.appendQueryParameter(entry.getKey().toString(), entry.getValue().toString()); entries.remove(); // avoids a ConcurrentModificationException } output = builder.build().getEncodedQuery(); } } return output; } public static URLConnection makeRequest(String method, String apiAddress, String accessToken, String mimeType, String requestBody) throws IOException { URL url = new URL(apiAddress); HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); urlConnection.setDoInput(true); urlConnection.setDoOutput(!method.equals("GET")); urlConnection.setRequestMethod(method); urlConnection.setRequestProperty("Authorization", "Bearer " + accessToken); urlConnection.setRequestProperty("Content-Type", mimeType); OutputStream outputStream = new BufferedOutputStream(urlConnection.getOutputStream()); BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, "utf-8")); writer.write(requestBody); writer.flush(); writer.close(); outputStream.close(); urlConnection.connect(); return urlConnection; }

MainActivity.java:

@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); new APIRequest().execute(); } private class APIRequest extends AsyncTask<Void, Void, String> { @Override protected Object doInBackground(Void... params) { // Of course, you should comment the other CASES when testing one CASE // CASE 1: For FromBody parameter String url = "http://10.0.2.2/api/frombody"; String requestBody = Utils.buildPostParameters("'FromBody Value'"); // must have '' for FromBody parameter HttpURLConnection urlConnection = null; try { urlConnection = (HttpURLConnection) Utils.makeRequest("POST", url, null, "application/json", requestBody); InputStream inputStream; // get stream if (urlConnection.getResponseCode() < HttpURLConnection.HTTP_BAD_REQUEST) { inputStream = urlConnection.getInputStream(); } else { inputStream = urlConnection.getErrorStream(); } // parse stream BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream)); String temp, response = ""; while ((temp = bufferedReader.readLine()) != null) { response += temp; } return response; } catch (IOException e) { e.printStackTrace(); return e.toString(); } finally { if (urlConnection != null) { urlConnection.disconnect(); } } // CASE 2: For JSONObject parameter String url = "http://10.0.2.2/api/testjsonobject"; JSONObject jsonBody; String requestBody; HttpURLConnection urlConnection; try { jsonBody = new JSONObject(); jsonBody.put("Title", "BNK Title"); jsonBody.put("Author", "BNK"); jsonBody.put("Date", "2015/08/08"); requestBody = Utils.buildPostParameters(jsonBody); urlConnection = (HttpURLConnection) Utils.makeRequest("POST", url, null, "application/json", requestBody); ... // the same logic to case #1 ... return response; } catch (JSONException | IOException e) { e.printStackTrace(); return e.toString(); } finally { if (urlConnection != null) { urlConnection.disconnect(); } } // CASE 3: For form-urlencoded parameter String url = "http://10.0.2.2/api/token"; HttpURLConnection urlConnection; Map<String, String> stringMap = new HashMap<>(); stringMap.put("grant_type", "password"); stringMap.put("username", "username"); stringMap.put("password", "password"); String requestBody = Utils.buildPostParameters(stringMap); try { urlConnection = (HttpURLConnection) Utils.makeRequest("POST", url, null, "application/x-www-form-urlencoded", requestBody); ... // the same logic to case #1 ... return response; } catch (Exception e) { e.printStackTrace(); return e.toString(); } finally { if (urlConnection != null) { urlConnection.disconnect(); } } } @Override protected void onPostExecute(String response) { super.onPostExecute(response); // do something... } }

@Srinivasan as you see in my code: "if (urlConnection.getResponseCode() == HttpURLConnection.HTTP_OK) { ... } else { ... } "
Ya i already got that but what i asked was which variable will have whole response from the given url
@Srinivasan more detail you can try InputStream inputStream = null; if (urlConnection.getResponseCode() == HttpURLConnection.HTTP_OK) { inputStream = urlConnection.getInputStream(); } else { inputStream = urlConnection.getErrorStream(); }
@Srinivasan actually, if resp code < 400 (Bad Request), you use getInputStream, if >=400, getErrorStream

Marchy · Accepted Answer · 2016-02-10 15:19:40Z

There's a much easier approach using PrintWriter (see here)

Basically all you need is:

// set up URL connection URL urlToRequest = new URL(urlStr); HttpURLConnection urlConnection = (HttpURLConnection)urlToRequest.openConnection(); urlConnection.setDoOutput(true); urlConnection.setRequestMethod("POST"); urlConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); // write out form parameters String postParamaters = "param1=value1&param2=value2" urlConnection.setFixedLengthStreamingMode(postParameters.getBytes().length); PrintWriter out = new PrintWriter(urlConnection.getOutputStream()); out.print(postParameters); out.close(); // connect urlConnection.connect();

Bhargav Thanki · Accepted Answer · 2016-07-11 18:28:09Z

AsyncTask to send data as JSONObect via POST Method

public class PostMethodDemo extends AsyncTask<String , Void ,String> { String server_response; @Override protected String doInBackground(String... strings) { URL url; HttpURLConnection urlConnection = null; try { url = new URL(strings[0]); urlConnection = (HttpURLConnection) url.openConnection(); urlConnection.setDoOutput(true); urlConnection.setDoInput(true); urlConnection.setRequestMethod("POST"); DataOutputStream wr = new DataOutputStream(urlConnection.getOutputStream ()); try { JSONObject obj = new JSONObject(); obj.put("key1" , "value1"); obj.put("key2" , "value2"); wr.writeBytes(obj.toString()); Log.e("JSON Input", obj.toString()); wr.flush(); wr.close(); } catch (JSONException ex) { ex.printStackTrace(); } urlConnection.connect(); int responseCode = urlConnection.getResponseCode(); if(responseCode == HttpURLConnection.HTTP_OK){ server_response = readStream(urlConnection.getInputStream()); } } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return null; } @Override protected void onPostExecute(String s) { super.onPostExecute(s); Log.e("Response", "" + server_response); } } public static String readStream(InputStream in) { BufferedReader reader = null; StringBuffer response = new StringBuffer(); try { reader = new BufferedReader(new InputStreamReader(in)); String line = ""; while ((line = reader.readLine()) != null) { response.append(line); } } catch (IOException e) { e.printStackTrace(); } finally { if (reader != null) { try { reader.close(); } catch (IOException e) { e.printStackTrace(); } } } return response.toString(); }

qqx · Accepted Answer · 2012-12-09 07:15:47Z

Try this:

HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost("your url"); List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(3); nameValuePairs.add(new BasicNameValuePair("user_name", "Name")); nameValuePairs.add(new BasicNameValuePair("pass","Password" )); nameValuePairs.add(new BasicNameValuePair("user_email","email" )); httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); // Execute HTTP Post Request HttpResponse response = httpclient.execute(httppost); String ret = EntityUtils.toString(response.getEntity()); Log.v("Util response", ret);

You can add as many nameValuePairs as you need. And don't forget to mention the count in the list.

This does not answer the question titled How to add parameters to HttpURLConnection using POST - It misleads.
NameValuePair is deprecated in Api 22, check my answer stackoverflow.com/a/29561084/4552938

Muhamed Riyas M · Accepted Answer · 2016-01-19 16:54:47Z

To call POST/PUT/DELETE/GET Restful methods with custom header or json data the following Async class can be used

public class HttpUrlConnectionUtlity extends AsyncTask<Integer, Void, String> { private static final String TAG = "HttpUrlConnectionUtlity"; Context mContext; public static final int GET_METHOD = 0, POST_METHOD = 1, PUT_METHOD = 2, HEAD_METHOD = 3, DELETE_METHOD = 4, TRACE_METHOD = 5, OPTIONS_METHOD = 6; HashMap<String, String> headerMap; String entityString; String url; int requestType = -1; final String timeOut = "TIMED_OUT"; int TIME_OUT = 60 * 1000; public HttpUrlConnectionUtlity (Context mContext) { this.mContext = mContext; this.callback = callback; } @Override protected void onPreExecute() { super.onPreExecute(); } @Override protected String doInBackground(Integer... params) { int requestType = getRequestType(); String response = ""; try { URL url = getUrl(); HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); urlConnection = setRequestMethod(urlConnection, requestType); urlConnection.setConnectTimeout(TIME_OUT); urlConnection.setReadTimeout(TIME_OUT); urlConnection.setDoOutput(true); urlConnection = setHeaderData(urlConnection); urlConnection = setEntity(urlConnection); if (urlConnection.getResponseCode() == HttpURLConnection.HTTP_OK) { response = readResponseStream(urlConnection.getInputStream()); Logger.v(TAG, response); } urlConnection.disconnect(); return response; } catch (ProtocolException e) { e.printStackTrace(); } catch (SocketTimeoutException e) { return timeOut; } catch (IOException e) { e.printStackTrace(); } catch (IllegalStateException e) { Logger.e(TAG, "ALREADY CONNECTED"); } return response; } @Override protected void onPostExecute(String response) { super.onPostExecute(response); if (TextUtils.isEmpty(response)) { //empty response } else if (response != null && response.equals(timeOut)) { //request timed out } else { //process your response } } private String getEntityString() { return entityString; } public void setEntityString(String s) { this.entityString = s; } private String readResponseStream(InputStream in) { BufferedReader reader = null; StringBuffer response = new StringBuffer(); try { reader = new BufferedReader(new InputStreamReader(in)); String line = ""; while ((line = reader.readLine()) != null) { response.append(line); } } catch (IOException e) { e.printStackTrace(); } finally { if (reader != null) { try { reader.close(); } catch (IOException e) { e.printStackTrace(); } } } return response.toString(); } private HttpURLConnection setEntity(HttpURLConnection urlConnection) throws IOException { if (getEntityString() != null) { OutputStream outputStream = urlConnection.getOutputStream(); BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8")); writer.write(getEntityString()); writer.flush(); writer.close(); outputStream.close(); } else { Logger.w(TAG, "NO ENTITY DATA TO APPEND ||NO ENTITY DATA TO APPEND ||NO ENTITY DATA TO APPEND"); } return urlConnection; } private HttpURLConnection setHeaderData(HttpURLConnection urlConnection) throws UnsupportedEncodingException { urlConnection.setRequestProperty("Content-Type", "application/json"); urlConnection.setRequestProperty("Accept", "application/json"); if (getHeaderMap() != null) { for (Map.Entry<String, String> entry : getHeaderMap().entrySet()) { urlConnection.setRequestProperty(entry.getKey(), entry.getValue()); } } else { Logger.w(TAG, "NO HEADER DATA TO APPEND ||NO HEADER DATA TO APPEND ||NO HEADER DATA TO APPEND"); } return urlConnection; } private HttpURLConnection setRequestMethod(HttpURLConnection urlConnection, int requestMethod) { try { switch (requestMethod) { case GET_METHOD: urlConnection.setRequestMethod("GET"); break; case POST_METHOD: urlConnection.setRequestMethod("POST"); break; case PUT_METHOD: urlConnection.setRequestMethod("PUT"); break; case DELETE_METHOD: urlConnection.setRequestMethod("DELETE"); break; case OPTIONS_METHOD: urlConnection.setRequestMethod("OPTIONS"); break; case HEAD_METHOD: urlConnection.setRequestMethod("HEAD"); break; case TRACE_METHOD: urlConnection.setRequestMethod("TRACE"); break; } } catch (ProtocolException e) { e.printStackTrace(); } return urlConnection; } public int getRequestType() { return requestType; } public void setRequestType(int requestType) { this.requestType = requestType; } public URL getUrl() throws MalformedURLException { return new URL(url); } public void setUrl(String url) { this.url = url; } public HashMap<String, String> getHeaderMap() { return headerMap; } public void setHeaderMap(HashMap<String, String> headerMap) { this.headerMap = headerMap; } }

And The Usage is

 HttpUrlConnectionUtlity httpMethod = new HttpUrlConnectionUtlity (mContext); JSONObject jsonEntity = new JSONObject(); try { jsonEntity.put("key1", value1); jsonEntity.put("key2", value2); } catch (JSONException e) { e.printStackTrace(); } httpMethod.setUrl(YOUR_URL_STRING); HashMap<String, String> headerMap = new HashMap<>(); headerMap.put("key",value); headerMap.put("key1",value1); httpMethod.setHeaderMap(headerMap); httpMethod.setRequestType(WiseConnectHttpMethod.POST_METHOD); //specify POST/GET/DELETE/PUT httpMethod.setEntityString(jsonEntity.toString()); httpMethod.execute();

Rahul_Pawar · Accepted Answer · 2016-05-22 06:02:19Z

In my case I have created function like this to make Post request which takes String url and hashmap of parameters

 public String postRequest( String mainUrl,HashMap<String,String> parameterList) { String response=""; try { URL url = new URL(mainUrl); StringBuilder postData = new StringBuilder(); for (Map.Entry<String, String> param : parameterList.entrySet()) { if (postData.length() != 0) postData.append('&'); postData.append(URLEncoder.encode(param.getKey(), "UTF-8")); postData.append('='); postData.append(URLEncoder.encode(String.valueOf(param.getValue()), "UTF-8")); } byte[] postDataBytes = postData.toString().getBytes("UTF-8"); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("POST"); conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); conn.setRequestProperty("Content-Length", String.valueOf(postDataBytes.length)); conn.setDoOutput(true); conn.getOutputStream().write(postDataBytes); Reader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8")); StringBuilder sb = new StringBuilder(); for (int c; (c = in.read()) >= 0; ) sb.append((char) c); response = sb.toString(); return response; }catch (Exception excep){ excep.printStackTrace();} return response; }

M P Mathugama · Accepted Answer · 2012-03-19 10:01:52Z

By using org.apache.http.client.HttpClient also you can easily do this with more readable way as below.

HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost("http://www.yoursite.com/script.php");

Within try catch you can insert

// Add your data List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2); nameValuePairs.add(new BasicNameValuePair("id", "12345")); nameValuePairs.add(new BasicNameValuePair("stringdata", "AndDev is Cool!")); httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); // Execute HTTP Post Request HttpResponse response = httpclient.execute(httppost);

Thank you for response! I can't use it this way though(stated in the question, first line).
NameValuePair is deprecated in Api 22, check my answer stackoverflow.com/a/29561084/4552938

Kishan Solanki · Accepted Answer · 2020-07-06 12:47:11Z

Parameters to HttpURLConnection using POST using NameValuePair with OutPut

 try { URL url = new URL("https://yourUrl.com"); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setUseCaches(false); conn.setDoInput(true); conn.setDoOutput(true); conn.setRequestMethod("POST"); conn.setRequestProperty("Content-Type", "application/json"); JSONObject data = new JSONObject(); data.put("key1", "value1"); data.put("key2", "value2"); OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream()); wr.write(data.toString()); wr.flush(); wr.close(); BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream())); String inputLine; StringBuffer response = new StringBuffer(); while ((inputLine = in.readLine()) != null) { response.append(inputLine); } in.close(); System.out.println(response.toString()); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (JSONException e) { e.printStackTrace(); }

Lakhwinder Singh · Accepted Answer · 2019-04-16 11:24:12Z

I use something like this:

SchemeRegistry sR = new SchemeRegistry(); sR.register(new Scheme("https", SSLSocketFactory.getSocketFactory(), 443)); HttpParams params = new BasicHttpParams(); SingleClientConnManager mgr = new SingleClientConnManager(params, sR); HttpClient httpclient = new DefaultHttpClient(mgr, params); HttpPost httppost = new HttpPost(url); httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); HttpResponse response = httpclient.execute(httppost);

Zyrus Reyes · Accepted Answer · 2016-07-13 09:08:15Z

JSONObject params = new JSONObject(); try { params.put(key, val); }catch (JSONException e){ e.printStackTrace(); }

this is how i pass "params"(JSONObject) through POST

connection.getOutputStream().write(params.toString().getBytes("UTF-8"));

Collectives™ on Stack Overflow

How to add parameters to HttpURLConnection using POST using NameValuePair

16 Answers 16

17 Comments

12 Comments

7 Comments

1 Comment

Comments

Comments

8 Comments

1 Comment

Comments

4 Comments

Comments

Comments

4 Comments

Comments

Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

16 Answers 16

17 Comments

12 Comments

7 Comments

1 Comment

Comments

Comments

8 Comments

1 Comment

Comments

4 Comments

Comments

Comments

4 Comments

Comments

Comments

Comments

Linked

Related