如何显示下载包含在部署war中的文件的链接？

@WebServlet("/download")
public class DownloadServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String fileName = "file.txt"; // 要下载的文件名
        String filePath = getServletContext().getRealPath("/WEB-INF/classes/" + fileName); // 获取文件路径

        File file = new File(filePath);

        // 设置响应内容的类型
        response.setContentType("application/octet-stream");
        response.setHeader("Content-Disposition", "attachment;filename=" + fileName);

        try (InputStream inputStream = new FileInputStream(file); OutputStream outputStream = response.getOutputStream()) {
            byte[] buffer = new byte[4096];
            int bytesRead;

            while ((bytesRead = inputStream.read(buffer)) != -1) {
                outputStream.write(buffer, 0, bytesRead);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

<a href="/download">Download File</a>