通过Jboss服务器的HTML请求检索Json

Question

当我尝试从JBoss服务器查询一些JSON时，我正在从服务器运行java.net.SocketException: Unexpected end of file。我希望有人能发现我出错的地方。或者有没有人有任何建议从我的Jboss服务器中提取这个JSON？

try{
        URL u = new URL("http://localhost:9990/management/subsystem/datasources/data-source/MySQLDS/statistics?read-resource&include-runtime=true&recursive=true");
        HttpURLConnection c = (HttpURLConnection) u.openConnection();
        String encoded = Base64.encode(("username"+":"+"password").getBytes());
        c.setRequestMethod("POST");
        c.setRequestProperty("Authorization", "Basic "+encoded);
        c.setRequestProperty("Content-Type","application/json");
        c.setUseCaches(false);
        c.setAllowUserInteraction(false);
        c.setConnectTimeout(5000);
        c.setReadTimeout(5000);
        c.connect();

        int status = c.getResponseCode();  // throws the exception here

        switch (status) {
            case 200:
            case 201:
                BufferedReader br = new BufferedReader(new InputStreamReader(c.getInputStream()));
                StringBuilder sb = new StringBuilder();
                String line;
                while ((line = br.readLine()) != null) {
                    sb.append(line+"\n");
                }
                br.close();
                System.out.println(sb.toString());
                break;
            default:
                System.out.println(status);
                break;
        }



    }  catch (Exception e)
    {
        e.printStackTrace();
    }