Encode/Decode HttpPost UTF-8 Java

Question

I am having troubles trying to send post data in utf8 format from the client to my server.

I have read a lot about this topic but I can´t find the solution. I am sure that I am missing something basic.

Here is my client code to make the post request

public static PostResponse post(String url, String data) {
        PostResponse response = new PostResponse();
        try {
            // 1. create HttpClient
            HttpClient httpclient = new DefaultHttpClient();

            // 2. make POST request to the given URL
            HttpPost httpPost = new HttpPost(url);
            httpPost.setHeader("Content-Type", "text/plain; charset=UTF-8");

            // 3. set string to StringEntity
            StringEntity se = new StringEntity(data);

            // 4. set httpPost Entity
            httpPost.setEntity(se);

            // 5. Execute POST request to the given URL
            HttpResponse httpResponse = httpclient.execute(httpPost);

        } catch (IOException e) {

        }
        return response;

    }

This is the code in my server side to receive the text in utf8 (Polish characters are not appearing, I am getting "?" instead.)

protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
try {
            BufferedReader reader;
            reader = req.getReader();
            Gson gson = new Gson();
            msg = gson.fromJson(reader, MsgChat.class); //String in the client was json
        } catch (IOException e) {

        }
}

I wrote only the relevant code.

I would appreciate any help regarding this. Thanks.

Answer 1

I had the same problem. You should use this code:

httpPost.setEntity(new StringEntity(json, "UTF-8"));

Hope this can help you.

Answer 2

As I see you should use new StringEntity(data, ContentType.APPLICATION_JSON). By default it is iso-8859-1, setHeader is not correct way to set encoding as I understand it.