Java 使用spring mvc下载的Xlsx文件已损坏，内容类型已更改

控制器方法，该方法调用服务并使用ApachePOI生成xlsx并返回视图

@RequestMapping(value = "/getSummary", method = RequestMethod.GET)
public String getSummary(Model model, HttpServletRequest request,
                                             HttpServletResponse response,
                                             @ModelAttribute("dateFrom") String dateFrom,
                                             @ModelAttribute("dateTo") String dateTo) throws Exception {

    logger.debug("date=" + dateFrom + "TO date=" + dateTo);
    AuthParam authParam = (AuthParam) request.getSession().getAttribute("authParam");
    if (authParam == null) {
        model.addAttribute("success", false);
        model.addAttribute("error_msg", "Auth Failed.");
        return "shipment/getSummary";
    }
    try {
        List<SummaryResponse> summaryBeanResponse = reportClient.getSummary(authParam, dateFrom, dateTo);
        logger.debug("Result List Size : {}", summaryBeanResponse.size());
        if (summaryBeanResponse.size() > 0) {
            byte[] reportBytes = buildSummaryXlsx(summaryBeanResponse, dateTo);
            logger.debug("Xlsx Sheet Generated!!");
            String fileName = "summary_" + StringUtils.join(dateTo.split("-"), "_") + ".xlsx";
            model.addAttribute("success", true);
            response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
            response.setHeader("content-disposition", "attachment; filename=" + fileName);
            logger.debug("Content-Type : {}", response.getContentType());
            logger.debug("Header : {}", response.getHeader("Content-Disposition"));
            response.getOutputStream().write(reportBytes);
            logger.debug("Set ALL");
        } else {
            model.addAttribute("success", false);
            model.addAttribute("error_msg", "No data found by search.");
        }
    } catch (Exception ex) {
        model.addAttribute("success", false);
        model.addAttribute("error_msg", "Service error.");
        logger.error("ERROR on report xlsx", ex);
    }
    return "shipment/getSummary";
}

private byte[] buildSummaryXlsx(List<SummaryResponse> summaryResponseList, String date) throws Exception {
    try {
        Workbook workbook = new XSSFWorkbook();
        // create excel xls sheet
        XSSFSheet sheet = (XSSFSheet) workbook.createSheet("summary");
        sheet.setDefaultColumnWidth(14);

        // create style for header cells
        XSSFCellStyle headerStyle = (XSSFCellStyle) workbook.createCellStyle();
        Font font = workbook.createFont();
        font.setFontName("Arial");
        headerStyle.setFont(font);
        headerStyle.setAlignment(HorizontalAlignment.CENTER);
        headerStyle.setVerticalAlignment(VerticalAlignment.CENTER);

        int rowCount = 0;
        int cellCount = 0;

        // Manipulating Data Using Apache-POI

        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        workbook.write(byteArrayOutputStream);
        return byteArrayOutputStream.toByteArray();
    } catch (Exception ex) {
        logger.debug("Exception On Population Xlsx Sheet, {}", ex);
    }
    return null;
}

打印日志：

    2017-07-31 18:26:12,635 DEBUG [admin] (ShipmentController.java:522) - REPORT date=2017-07-1TO date=2017-07-31
    2017-07-31 18:26:12,635 DEBUG [admin] (ReportServiceClient.java:178) - Calling [ReportService.getSummary] service for dateFrom[2017-07-1] and dateTo[2017-07-31]
    2017-07-31 18:26:12,671 DEBUG [admin] (ShipmentController.java:531) - Result List Size : 4
    2017-07-31 18:26:12,824 DEBUG [admin] (ShipmentController.java:534) - Xlsx Sheet Generated!!
    2017-07-31 18:26:12,824 DEBUG [admin] (ShipmentController.java:539) - Content-Type : application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
    2017-07-31 18:26:12,824 DEBUG [admin] (ShipmentController.java:540) - Header : attachment; filename=summary_2017_07_31.xlsx
    2017-07-31 18:26:12,824 DEBUG [admin] (ShipmentController.java:542) - Set ALL

我可以下载xlsx文件，但数据已损坏。实际上，web页面内容/html页面视图是在xlsx文件中编写的

当没有数据时，我想显示弹出窗口，当有数据时，我想下载创建的xlsx

为什么内容类型在我设置后发生更改。 我怎样才能妥善解决这个问题

注意： 我有一种类似的控制器方法，我创建一个pdf文件，并将内容类型设置为

response.setContentType（“应用程序/pdf”）

---

它对我来说工作得很好。

您需要添加一个单独的控制器

@RequestMapping

，它只返回XLSX文件字节，并用

@ResponseBody

注释。然后，您可以从JSP的主体中创建指向该端点的超链接，这样当用户单击它时，他们就可以下载该文件。试图在一个

RequestMapping

中同时返回JSP正文和XLSX内容是行不通的，因为包含JSP的返回类型设置为

text/html

您可以将某些内容流式传输到客户端或转到网页。你总是去网页。您不能在一个连接上做两件事情。

**Response Headers**
HTTP/1.1 200 OK
Cache-Control: no-cache
Cache-Control: no-store
Date: Mon, 31 Jul 2017 12:26:12 GMT
Pragma: no-cache
Transfer-Encoding: chunked
Content-Type: text/html;charset=UTF-8
Expires: Thu, 01 Jan 1970 00:00:00 GMT
Content-Disposition: attachment; filename=summary_2017_07_31.xlsx
Set-Cookie: JSSESSIONID=1501503972634; path=/
Content-Language: en

    2017-07-31 18:26:12,635 DEBUG [admin] (ShipmentController.java:522) - REPORT date=2017-07-1TO date=2017-07-31
    2017-07-31 18:26:12,635 DEBUG [admin] (ReportServiceClient.java:178) - Calling [ReportService.getSummary] service for dateFrom[2017-07-1] and dateTo[2017-07-31]
    2017-07-31 18:26:12,671 DEBUG [admin] (ShipmentController.java:531) - Result List Size : 4
    2017-07-31 18:26:12,824 DEBUG [admin] (ShipmentController.java:534) - Xlsx Sheet Generated!!
    2017-07-31 18:26:12,824 DEBUG [admin] (ShipmentController.java:539) - Content-Type : application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
    2017-07-31 18:26:12,824 DEBUG [admin] (ShipmentController.java:540) - Header : attachment; filename=summary_2017_07_31.xlsx
    2017-07-31 18:26:12,824 DEBUG [admin] (ShipmentController.java:542) - Set ALL