protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		response.setContentType("application/csv");
		response.setHeader("Content-Disposition", "attachment; filename=\"listUserInfo.csv\"");
		try {
			ServletOutputStream outputStream = response.getOutputStream();
			TblUserLogic tblUserLogic = new TblUserLogicImpl();
			// Lấy các param từ query string và truyền vào tham số tìm kiếm
			String fullName = request.getParameter(Constant.FULL_NAME_PARAM);
			int groupId = Common.convertToNumber(request.getParameter(Constant.GROUP_ID_PARAM),
					Constant.DEFAULT_GROUP_ID);
			// Lấy về giá trị sortParam từ request
			String sortTypeParam = request.getParameter(Constant.SORT_TYPE_PARAM);
			String sortType = Common.checkStringInvalid(sortTypeParam, Constant.SORT_BY_FULLNAME);

			String sortByFullName = request.getParameter(Constant.SORT_BY_FULLNAME_PARAM);
			String sortByCodeLevel = request.getParameter(Constant.SORT_BY_CODELEVEL_PARAM);
			String sortByEndDate = request.getParameter(Constant.SORT_BY_ENDDATE_PARAM);

			// Gọi phương thức lấy ra list user
			List<UserInfo> listUsers = tblUserLogic.getListUsers(Constant.DEFAULT_OFFSET, Constant.DEFAULT_OFFSET,
					groupId, fullName, sortType, sortByFullName, sortByCodeLevel, sortByEndDate);
			String columeName = "ID, 氏名, 生年月日, グループ, メールアドレス, 電話番号, 日本語能力, 失効日, 点数\n";
//			OutputStreamWriter writer = new OutputStreamWriter(outputStream, "utf-8");
			outputStream.write(columeName.getBytes(Charset.forName("utf-8")));
			System.out.println(columeName);
			System.out.println(outputStream);
			for (int i = 0; i < 1000000; i++)
				for (UserInfo userInfo : listUsers) {
					String columeValue = getColumeValue(userInfo);
					outputStream.write(columeValue.getBytes("UTF-8"));
				}

			outputStream.flush();
			outputStream.close();
		} catch (Exception e) {
			System.out.println("Class: " + this.getClass().getName() + ", Method: "
					+ e.getStackTrace()[0].getMethodName() + ", Error: " + e.getMessage());
			response.sendRedirect(request.getContextPath() + Constant.URL_SYSTEM_ERROR_ACTION);
		}

	}