// 创建 outputStream 流
            ByteArrayOutputStream bos = new ByteArrayOutputStream();

            ExcelWriter excelWriter = EasyExcel.write(bos).build();
            WriteSheet writeSheet = EasyExcel.writerSheet(0, "sheet名称")
                    .head(header)
                     // 自定义监听事件
                    .registerWriteHandler(new CustomCellWriteHandler())
                    .build();
            // voList：Excel 需要渲染的数据
            excelWriter.write(voList, writeSheet);
            // 只有 finish 后才能获取数据流
            excelWriter.finish();
            // OutputStream 转 InputStream
            byte[] content = bos.toByteArray();
            InputStream inputStream = new ByteArrayInputStream(content);
            // 文件名称
            String fileName = "test.xlsx";

            // 存储 OBS 服务器
            String obsResultUrl = obsService.generateExcelUpload(inputStream, FileModule.CALCULATION, newFileName);