@GetMapping("/getExample")
    public void getExample(HttpServletResponse response) throws IOException {
        // 造下拉選單的array
        Map<String, String> stateMap = new HashMap<>();
        List<String> stateList = new ArrayList<>();
        stateMap.put(LightCtrlDetailState.PM_ACCEPT.getCode(), LightCtrlDetailState.PM_ACCEPT.getDesc());
        stateMap.put(LightCtrlDetailState.PM_DISCARD.getCode(), LightCtrlDetailState.PM_DISCARD.getDesc());
        stateMap.forEach((k, v) -> stateList.add("#" + k + "(" + v + ")"));
        String[] stateArray = stateList.toArray(new String[0]);

        List<String> faultList = new ArrayList<>();
        Map<String, String> faultMap = LightCtrlFault.toMap();
        faultMap.forEach((k, v) -> faultList.add("#" + k + "(" + v + ")"));
        String[] faultArray = faultList.toArray(new String[0]);

        List<String> deviceTypeList = new ArrayList<>();
        Map<String, String> deviceTypeMap = LightCtrlDeviceType.toMap();
        deviceTypeMap.remove(LightCtrlDeviceType.L1.getCode()); // 排除通用的
        deviceTypeMap.forEach((k, v) -> deviceTypeList.add("#" + k + "(" + v + ")"));
        String[] deviceTypeArray = deviceTypeList.toArray(new String[0]);

        ExcelWriter writer = ExcelUtil.getWriter(true);
        Map<String, Object> row1 = new LinkedHashMap<>();
        row1.put("*IMEI或MAC", "例如:356211691894888");
        row1.put("*分類", "請選擇...");
        row1.put("*故障原因", "請選擇...");
        row1.put("*裝置類型代碼", "請選擇...");
        row1.put("IMSI", "例如:466978000369264，最長15位");
        row1.put("故障描述", "描述訊息，最多100字(此行為範例，上傳時請刪除)");

        ArrayList<Map<String, Object>> rows = CollUtil.newArrayList(row1);
        // 設定欄寬
        writer.setColumnWidth(0, 30);
        writer.setColumnWidth(1, 20);
        writer.setColumnWidth(2, 20);
        writer.setColumnWidth(3, 25);
        writer.setColumnWidth(4, 30);
        writer.setColumnWidth(5, 30);
        // 設定字型
        StyleSet styleSet =
                writer.getStyleSet().setFont(HSSFColor.HSSFColorPredefined.BLACK.getIndex(), (short) 12, "新細明體", false);
        CellStyle cellStyle = writer.getCellStyle();
        cellStyle.setAlignment(HorizontalAlignment.LEFT); // 靠左
        cellStyle.setDataFormat(Short.decode("0x31")); // 文字

        writer.setStyleSet(styleSet); // 套用樣式
        writer.addSelect(1, 1, stateArray);
        writer.addSelect(2, 1, faultArray);
        writer.addSelect(3, 1, deviceTypeArray);
        writer.write(rows, true); // 一次性寫出內容，使用默認樣式，強制輸出標題
        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8");
        response.setHeader("Content-Disposition", "attachment;filename=test.xlsx");
        ServletOutputStream out = response.getOutputStream();

        writer.flush(out, true);
        writer.close();
        IoUtil.close(out);
    }

/** 獲取範例 */
function getExample() {
	fetch(ems.parseUrl("file") + "/getExample")
	  .then(resp => resp.blob())
	  .then(blob => {
	    const url = window.URL.createObjectURL(blob);
	    const a = document.createElement('a');
	    a.style.display = 'none';
	    a.href = url;
	    // the filename you want
	    a.download = '(範例).xlsx';
	    document.body.appendChild(a);
	    a.click();
	    window.URL.revokeObjectURL(url);
	    toastr.success("成功，請查看下載檔案");
	  })
	  .catch(() => toastr.error("發生錯誤"));
}