title: Http 415 Unsupported Media type error with JSON
body: <p>I am calling a REST service with a JSON request and it responds with a <code>HTTP 415 "Unsupported Media Type"</code> error. </p>
  
  <p>The request content type is set to <code>("Content-Type", "application/json; charset=utf8")</code>.</p>
  
  <p>It works fine if I don't include a JSON object in the request. I am using the <code>google-gson-2.2.4</code> library for JSON. </p>
  
  <p>I tried using a couple of different libraries but it made no difference.</p>
  
  <p>Can anybody please help me to resolve this? </p>
  
  <p>Here is my code: </p>
  
  <pre><code>public static void main(String[] args) throws Exception
  {
  
      JsonObject requestJson = new JsonObject();
      String url = "xxx";
  
      //method call for generating json
  
      requestJson = generateJSON();
      URL myurl = new URL(url);
      HttpURLConnection con = (HttpURLConnection)myurl.openConnection();
      con.setDoOutput(true);
      con.setDoInput(true);
  
      con.setRequestProperty("Content-Type", "application/json; charset=utf8");
      con.setRequestProperty("Accept", "application/json");
      con.setRequestProperty("Method", "POST");
      OutputStream os = con.getOutputStream();
      os.write(requestJson.toString().getBytes("UTF-8"));
      os.close();
  
  
      StringBuilder sb = new StringBuilder();  
      int HttpResult =con.getResponseCode();
      if(HttpResult ==HttpURLConnection.HTTP_OK){
      BufferedReader br = new BufferedReader(new   InputStreamReader(con.getInputStream(),"utf-8"));  
  
          String line = null;
          while ((line = br.readLine()) != null) {  
          sb.append(line + "\n");  
          }
           br.close(); 
           System.out.println(""+sb.toString());  
  
      }else{
          System.out.println(con.getResponseCode());
          System.out.println(con.getResponseMessage());  
      }  
  
  }
  public static JsonObject generateJSON () throws MalformedURLException
  
  {
     String s = "http://www.example.com";
          s.replaceAll("/", "\\/");
      JsonObject reqparam=new JsonObject();
      reqparam.addProperty("type", "arl");
      reqparam.addProperty("action", "remove");
      reqparam.addProperty("domain", "staging");
      reqparam.addProperty("objects", s);
      return reqparam;
  
  }
  }
  </code></pre>
  
  <p>The value of <code>requestJson.toString()</code> is :  </p>
  
  <p><code>{"type":"arl","action":"remove","domain":"staging","objects":"http://www.example.com"}</code></p>