进击 office web apps 整合Java web项目

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 + "\"}";
	}