利用easyExcel生成excel并上传文件服务器(单独设置表头)

结合相关easyExcel的相关信息

//上传服务器方法，返回url链接地址

public String exportToMinIO(List<aaaDto> list) {
        String pathUrl = "";
        String fileName = new SimpleDateFormat("yyyyMMddHHmmss").format(System.currentTimeMillis()) + ".xlsx";
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        ExcelWriter excelWriter = EasyExcel.write(byteArrayOutputStream).build();
//        ExcelWriter excelWriter = EasyExcel.write(fileName, aaaDto.class).build();
        try {
            // 这里注意 单独设置sheet的表头
            WriteSheet writeSheet = EasyExcel.writerSheet(0,"第一个sheet数据").head(aaaDto.class).build();
            excelWriter.write(list, writeSheet);
        } catch (Exception e){
            log.info("上传文件异常失败:{}", e.getMessage());
        } finally {
            // 千万别忘记finish 会帮忙关闭流
            if (excelWriter != null) {
                excelWriter.finish();
                MultipartFile file = new MockMultipartFile("SendLocalitiesEmail",
                        "businessChannels" + ".xlsx",
                        "application/vnd.openxmlformats-officedocument.spreadsheetml.xlsx", byteArrayOutputStream.toByteArray());
                pathUrl = imagesUploadMiNio.uploadExcelFile(fileName,file);
            }
        }
        return pathUrl;
    }