如何将pptx文件从一个文件夹下载到客户端系统- MVC

@Controller
public class FileDownloadController {
    
    @GetMapping("/download")
    public void downloadPptx(HttpServletResponse response) throws IOException {
        String filePath = "path/to/pptx/file.pptx";  // 文件的实际路径
        
        File file = new File(filePath);
        FileInputStream fis = new FileInputStream(file);
        response.setContentType("application/vnd.openxmlformats-officedocument.presentationml.presentation");  // 设置响应的Content-Type为PPTX类型
        response.setHeader("Content-Disposition", "attachment; filename=\"" + file.getName() + "\"");  // 设置响应头，指定文件名
        
        ServletOutputStream outputStream = response.getOutputStream();
        byte[] buffer = new byte[4096];
        int bytesRead;
        while ((bytesRead = fis.read(buffer)) != -1) {
            outputStream.write(buffer, 0, bytesRead);
        }
        fis.close();
        outputStream.flush();
    }
}