Question

我是GWT的新手，在我的公司，我被要求在我们的某个应用程序中进行一些更改。目前，该计划以.xls格式生成报告。现在我们要将其更改为.xlsx

public class Download extends HttpServlet {

    private static final long serialVersionUID = 5580666921970339383L;

    @Override
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doGet(request, response);
    }

    @Override
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        String filename = (String)request.getSession().getAttribute(CrossReportConstants.ATTR_FILENAME);
        byte[] data = (byte[])request.getSession().getAttribute(CrossReportConstants.ATTR_REPORT);
        request.getSession().setAttribute(CrossReportConstants.ATTR_FILENAME, null);
        request.getSession().setAttribute(CrossReportConstants.ATTR_REPORT, null);

        response.setContentType("application/vnd.ms-excel");

        response.setHeader("Content-Disposition", "attachment;filename=" + filename);
        response.setHeader("Pragma", "no-cache");
        response.setHeader("Expires", "0");
        response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
        response.setContentLength(data.length);

        try {
            InputStream in = new ByteArrayInputStream(data);
            ServletOutputStream out = response.getOutputStream();

            byte[] outputByte = new byte[4096];
            // copy binary contect to output stream
            while (in.read(outputByte, 0, 4096) != -1) {
                out.write(outputByte, 0, 4096);
            }
            in.close();
            out.flush();
            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

}

我将response.setContentType("application/vnd.ms-excel");更改为

 response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");

我将文件名更改为exampleReport.xlsx 当我测试应用程序时，我可以下载报告，但我无法打开它 - Excel告诉我文件已损坏。（文件大小合适，当我在文本编辑器中打开它时，我可以看到内容）我错过了什么？提前致谢

Java GWT无法打开下载的xlsx文件

0 个答案: