echarts 導出excel

public ResponseEntity<byte[]> chartExport(HttpServletRequest request, String picinfo, HttpServletResponse response) {
    //類型
    String type = request.getParameter("type");

    try {
        //decodeBase64();
        List<MockTestNetTrend> dataList = JsonUtils.json2List(request.getParameter("mockTestNetTrendList"), MockTestNetTrend.class);
        List<String> cellList = JsonUtils.json2List(request.getParameter("cellList"), String.class);
        // 生成圖片
        byte[] picInfoByte = base64TObyte(request, picinfo);
      /*  String picPath = "C:\\Users\\Administrator\\Desktop\\pic" + ".png";
        File picFile = new File(picPath);//圖片文件
        OutputStream picStream = new FileOutputStream(picFile);//圖片輸出流
        picStream.write(picInfoByte);
        picStream.flush();
        picStream.close();*/
        
        
        String outFileName = FileNameUtil.createFileName("xls");
        String exportFileName = type + ".xls";
        //導出路徑
        String exportFilePath = CacheUtil.getSysParam(GlobalConstant.COM_PROP_ACCESS_EXPORTPATH);

        // 模板輸入流
        Workbook wb = new HSSFWorkbook();
        Sheet sheet = wb.createSheet();
        int index = 1;

        //創建表頭
        createHeader(wb, sheet,cellList);

        //寫入數據
        if (!StringUtil.isEmptyList(dataList)) {
            writeData(dataList, wb, sheet, index, type);
        }

        Drawing patri = sheet.createDrawingPatriarch();
        HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 0, 0,
                (short) 0, dataList.size() + 2, (short) 5, 25);

        //圖通過流的形式插入到excel模板中
        ByteArrayOutputStream outStream = new ByteArrayOutputStream(); // 將圖片寫入流中
        ByteArrayInputStream in = new ByteArrayInputStream(picInfoByte);    //將picInfoByte作為輸入流；
        BufferedImage bufferImg = ImageIO.read(in);     //將in作為輸入流，讀取圖片存入image中，而這里in可以為ByteArrayInputStream();
        ImageIO.write(bufferImg, "png", outStream); // 利用HSSFPatriarch將圖片寫入EXCEL

        patri.createPicture(anchor, wb.addPicture(
                outStream.toByteArray(), HSSFWorkbook.PICTURE_TYPE_PNG));
        File outFile = new File(exportFilePath + File.separator + outFileName);
        if (!outFile.getParentFile().exists()) {
            outFile.getParentFile().mkdirs();
        }
        wb.write(new FileOutputStream(outFile));
        outStream.flush();
        outStream.close();
     /*   if (picFile.exists()){
            picFile.delete();
        }*/
        

        return ExportUtil.export(exportFileName, outFile, true);
    } catch (Exception e) {
        e.printStackTrace();
    }
   
    return null;
}