为什么从服务器下载Excel（xlsx）文件后，文件已损坏且无法打开？

Question

我正在尝试使用spring从服务器下载xlsx文件。文件下载但它显示文件已损坏的警报！

这是我的代码：

 File file = new File(outputPath+ fileName);
 FileInputStream fis = new FileInputStream(file);
 response.setContentType("application/vnd.openxmlformats-
 officedocument.spreadsheetml.sheet");
 response.setContentLength((int) file.length());        
 response.setHeader("Content-Disposition", "attachment; filename="+fileName);
 FileCopyUtils.copy(fis, response.getOutputStream());

JSP页面：

$("#download").click(function(){
  if($(this).data('clicked', true)){
    window.location="http://localhost:8080/IRI-AXCO/downloadFile";
  }
}

以下是快照：

感谢帮助！感谢

Answer 1

我自己找到了解决方案，

@GetMapping("/downloadFile")
    public void download(HttpServletRequest request, HttpServletResponse response)throws Exception{
        try {
            fileName=fileName.replace(" ", "_");
            File file = new File(outputPath+ fileName);
            FileInputStream fis = new FileInputStream(file);
            Path source = Paths.get(outputPath+ fileName); 
            String contentType=Files.probeContentType(source);
            response.setContentType(contentType);
            response.setContentLength((int) file.length());
            response.setHeader("Content-Disposition", "attachment; filename="+fileName);
            FileCopyUtils.copy(fis, response.getOutputStream());
        } catch (Exception e) {
            e.printStackTrace();
            throw e;
        }
    }

上面的代码给了我结果！