public void deleteAllLocation() {
		String user_id, user_password;
		try {
			user_id = request.getParameter("user_id").trim();
			user_password = request.getParameter("user_password").trim();
		} catch (Exception e) {
			jsonObject.put("RC", RC.PARAMETER_ERROR);
			return;
		}

		UserInfo userInfo;
		try {
			userInfo = new UserInfoDao().getById(user_id);
		} catch (Exception e) {
			jsonObject.put("RC", RC.SQL_EXCEPTION);
			return;
		}
		if (userInfo == null) {
			jsonObject.put("OC", OC.UNKNOWN_USER_ID);
		} else if (userInfo.getUser_password() != user_password) {
			jsonObject.put("OC", OC.WRONG_PASSWORD);
		} else {
			jsonObject.put("OC", OC.FAILIED);
			jsonObject.put("RC", RC.DEVELOPING);
		}
	}