@RequestMapping("/downloadExampleExcel")
@ResponseBody
public void downloadExampleExcel(HttpServletResponse response) {
    InputStream inputStream = null;
    ServletOutputStream servletOutputStream = null;
    try {
        Resource resource = new DefaultResourceLoader().getResource("classpath:example_add_infos.xls");

        response.setContentType("application/force-download");
        response.setHeader("Content-Disposition", "attachment;fileName=" + "example_add_infos.xls");

        inputStream = resource.getInputStream();
        servletOutputStream = response.getOutputStream();
        IOUtils.copy(inputStream, servletOutputStream);
        response.flushBuffer();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            if (servletOutputStream != null) {
                servletOutputStream.close();
                servletOutputStream = null;
            }
            if (inputStream != null) {
                inputStream.close();
                inputStream = null;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}