public static StringBuffer json(ResponseCode responseCode, int page, int total, JSONArray jar) {
   JSONObject resp = new JSONObject();
   try {
     resp.put(json_status, responseCode.getCode());
     resp.put(json_desc, responseCode.getDesc());
     resp.put(json_page, page);
     resp.put(json_total, total);
     resp.put(json_data, jar);
   } catch (JSONException e) {
     return json_error;
   }
   return new StringBuffer(resp.toString());
 }
 public static StringBuffer json(ResponseCode responseCode, JSONObject job) {
   return json(responseCode.getCode(), responseCode.getDesc(), job);
 }
 public static StringBuffer json(ResponseCode responseCode, String desc) {
   return json(responseCode.getCode(), responseCode.getDesc() + desc);
 }