cURL and HttpURLConnection - Post JSON Data

Question

How to post JSON data using HttpURLConnection? I am trying this:

HttpURLConnection httpcon = (HttpURLConnection) ((new URL(\"a url\").openConnection()));
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Answer 1

You may want to use the OutputStreamWriter class.

final String toWriteOut = "{'value': 7.5}";
final OutputStreamWriter osw = new OutputStreamWriter(connection.getOutputStream());
osw.write(toWriteOut);
osw.close();