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Editorial Team
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Asked: 2026-06-12T00:28:41+00:00

So heres my problem. I’m reading a json from web using httpurlconnection . That

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So heres my problem. I’m reading a json from web using httpurlconnection. That json contains german special chars (äöü). Inside NetBeans, everything is fine. When I build the jar an run it, “Silberanhänger” changes to “Silberanhänger”. Heres the code, nothing special inside

URL url = new URL("jsonUrl);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setUseCaches(false);
con.setRequestProperty("Accept-Language","de-de,de;q=0.8,en-us;q=0.5,en;q=0.3"); 
con.setRequestProperty("Cookie","s="+session);
try (BufferedReader bf = new BufferedReader(new InputStreamReader(
                     con.getInputStream()))) {
            jsonRepresentation = bf.readLine(); //only 1 line
}
con.disconnect();
System.out.println(jsonRepresentation) // "ä" in IDE, "ä" in Live
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1 Answer

  1. Editorial Team

    Setting -Dfile.encoding=UTF8 is a hack that will have side-effects on all code run on that JVM. A better hack would be to specify the charset in the InputStreamReader’s constructor

    new InputStreamReader(con.getInputStream(), "UTF-8")

    However this might still fail if the HTTP server on the other end changes its encoding. You would be better off using a HTTP library such as Apache HTTPComponents to parse the HTTP response into a String. It will read the encoding from the HTTP header and do the right thing in all circumstances.

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