// conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Type", "application/json");
conn.setRequestProperty("Connection", "Close");
// conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Type", "application/json");
conn.setRequestProperty("Connection", "Close");