spring mvc + ajax无刷新下载文件

SpringMvcFileDownload.java

    @RequestMapping(value = "/download")
    public ResponseEntity<byte[]> download(HttpServletRequest request,
                                           @RequestParam("filename") String filename,
                                           Model model) throws Exception {
        //下载文件路径
        String path = request.getServletContext().getRealPath("/images/");
        File file = new File(path + File.separator + filename);
        HttpHeaders headers = new HttpHeaders();
        //下载显示的文件名，解决中文名称乱码问题  
        String downloadFielName = new String(filename.getBytes("UTF-8"), "iso-8859-1");
        //通知浏览器以attachment（下载方式）打开图片
        headers.setContentDispositionFormData("attachment", downloadFielName);
        //application/octet-stream ： 二进制流数据（最常见的文件下载）。
        headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
        return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file), headers, HttpStatus.CREATED);
    }