ajax下载文件流

前端下载文件流

	downLoad: function (id) {
        var url = __ctxPath + '/路径/downLoadFile.action';
        $.ajax({
            url: url,
            type: "POST",
            data: {'id': id},
            success: function (response, status, request) {
                var disp = request.getResponseHeader('Content-Disposition');
                if (disp && disp.search('attachment') !== -1) {  //判断是否为文件
                    var form = $('<form method="POST" action="' + url + '">');
                    $.each({'id': id}, function (k, v) {
                        form.append($('<input type="hidden" name="' + k +
                            '" value="' + v + '">'));
                    });
                    $('body').append(form);
                    form.submit(); //自动提交
                }
            }
        });
    },

 	@RequestMapping(value = "/downLoadFile", method = RequestMethod.POST)
    public HttpServletResponse exportExcel(Integer id, HttpServletResponse response){
        String path = "path";
        try {
            // path是指欲下载的文件的路径。
            File file = new File(path);
            // 取得文件名。
            String fileName = file.getName();
            // 以流的形式下载文件。
            InputStream fis = new BufferedInputStream(new FileInputStream(path));
            byte[] buffer = new byte[fis.available()];
            fis.read(buffer);
            fis.close();
            // 清空response
            response.reset();
            // 设置response的Header
            response.addHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName,"UTF-8"));
            response.addHeader("Content-Length", "" + file.length());
            OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
            response.setContentType("application/octet-stream");
            toClient.write(buffer);
            toClient.flush();
            toClient.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
        return response;
    }