springboot 发送带excel附件的邮件

public String sendAttendedFileMail() throws Exception {
        MimeMessage mimeMessage = mailSender.createMimeMessage();
        // multipart模式
        String[] tos={"abc.cn","def.cn"}; //收件人
        String[] ccs={"z.cn","x.cn","v.cn","b.cn"}; //抄送人
        MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage, true, "utf-8");
        mimeMessageHelper.setTo(tos); //收件人
        mimeMessageHelper.setCc(ccs); //抄送人
        mimeMessageHelper.setFrom("[email protected]");
        mimeMessageHelper.setSubject("[Hello迈迪]-分销统计-迈格森渠道");
 
        StringBuilder sb = new StringBuilder();
        sb.append("");
        sb.append("

各位老师好：

");
        sb.append("

本邮件为系统自动发送，如有问题请联系Hello迈迪技术部。

");
        sb.append("

祝好！

");
        sb.append("

// 启用html
        mimeMessageHelper.setText(sb.toString(), true);
        // 设置附件
        XSSFWorkbook workbook = null;
        InputStream in = null;
        try {
            workbook = saleYzOrderService.exportOrder(0,3012);  //parentId只取前四位
            //临时缓冲区
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            //创建临时文件
            workbook.write(out);
            byte[] bookByteAry = out.toByteArray();
            in = new ByteArrayInputStream(bookByteAry);
        } catch (Exception e) {
//            logger.error("export orderList error!", e);
        }
        mimeMessageHelper.addAttachment("分销订单详情表.xlsx", new ByteArrayResource(IOUtils.toByteArray(in)), "application/vnd.ms-excel;charset=UTF-8");
 
        try {
            workbook = saleYzOrderService.exportCount();
            //临时缓冲区
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            //创建临时文件
            workbook.write(out);
            byte[] bookByteAry = out.toByteArray();
            in = new ByteArrayInputStream(bookByteAry);
        } catch (Exception e) {
//            logger.error("export orderList error!", e);
        }
 
        mimeMessageHelper.addAttachment("分销订单统计表.xlsx", new ByteArrayResource(IOUtils.toByteArray(in)), "application/vnd.ms-excel;charset=UTF-8");
 
        // 发送邮件
        mailSender.send(mimeMessage);
 
        return "邮件已发送";

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