public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

        HttpServletRequest httpRequest = (HttpServletRequest) request;

        HttpServletResponse httpResponse = (HttpServletResponse) response;

        String uri = httpRequest.getRequestURI(); /// wopihost/wopi/files/Excel.xlsx

        // 解决中文乱码问题

        String fileUri = URLDecoder.decode(uri.substring(uri.indexOf("/WOPI/") + 1, uri.length()), "UTF-8"); // /wopi/files/test.docx

        //String filePath = request.getServletContext().getRealPath("/") + fileUri;

        String filePath = "D:\\upload\\OA\\" + fileUri;

        if (fileUri.endsWith("/contents")) { // GetFile ：返回文件流

            filePath = filePath.substring(0, filePath.indexOf("/contents"));

            getFile(filePath, httpResponse);

        } else { // CheckFileInfo ：返回json

            response.setCharacterEncoding("UTF-8");

            response.setContentType("application/json;charset=UTF-8");

            PrintWriter out = null;

            try {

                out = response.getWriter();

                out.write(FileUtil.checkFileInfo(filePath));

            } catch (IOException e) {

                e.printStackTrace();

            } finally {

                if (out != null) {

                    out.close();

                }

            }

        }

        return;

    }

    private HttpServletResponse getFile(String path, HttpServletResponse response) {

        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();

            String contentType = "application/octet-stream";

            // 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=" + new String(filename.getBytes("utf-8"), "ISO-8859-1"));

            response.addHeader("Content-Length", "" + file.length());

            OutputStream toClient = new BufferedOutputStream(response.getOutputStream());

            response.setContentType(contentType);

            toClient.write(buffer);

            toClient.flush();

            toClient.close();

        } catch (IOException ex) {

            ex.printStackTrace();

        }

        return response;

    }

/**

     * 获取文件基本信息

     *

     * @param filePath文件路径

     * @return

     */

    public static String checkFileInfo(String filePath) {

        File file = new File(filePath);

        String baseFileName = null; // 文件名

        String ownerId = null; // 文件所有者的唯一编号

        long size = 0; // 文件大小，以bytes为单位

        // String sha256 = null; //文件的256位bit的SHA-2编码散列内容

        long version = 0; // 文件版本号，文件如果被编辑，版本号也要跟着改变

        if (file.exists()) {

            // 取得文件名。

            baseFileName = file.getName();

            size = file.length();

            // 取得文件的后缀名。

            // String ext = baseFileName.substring(baseFileName.lastIndexOf(".")

            // + 1);

            ownerId = "admin";

            // sha256 = new SHAUtils().SHA(FileUtils.readByByte(file),

            // "SHA-256");

            version = file.lastModified();

        }

        return "{\"BaseFileName\":\"" + baseFileName + "\",\"OwnerId\":\"" + ownerId + "\",\"Size\":\"" + size

                + "\",\"AllowExternalMarketplace\":\"" + true + "\",\"Version\":\"" + version + "\"}";

    }