OAF 中下载使用XML Publisher下载PDF附件

OAF doesn't readily expose the Controller Servlet's HttpRequest and HttpResponse objects so you need to extract it from the OAPageContext object via:

HttpServletResponse response = (HttpServletResponse) pageContext.getRenderingContext().getServletResponse();

Once you get the response object you could already manipulate its OutputStream.

public void downloadFile(OAPageContext pageContext) {

         HttpServletResponse response = (HttpServletResponse) pageContext.getRenderingContext().getServletResponse();

         File fileToDownload = this.createFile();

         String fileType = getMimeType("txt");
         response.setContentType(fileType);
         response.setContentLength((int) fileToDownload.length());
         response.setHeader("Content-Disposition", "attachment; filename=\"" + fileToDownload.getName() + "\"");

         InputStream in = null;
         ServletOutputStream outs = null;

         try {

             outs = response.getOutputStream();
             in = new BufferedInputStream(new FileInputStream(fileToDownload));
             int ch;

             while ((ch = in.read()) != -1) {
                 outs.write(ch);
             }

         } catch (IOException e) {

             // TODO
             e.printStackTrace();

         } finally {

             try {

                 outs.flush();
                 outs.close();

                 if (in != null) {
                     in.close();
                 }

             } catch (Exception e) {

                 e.printStackTrace();

             }

         }

     }

参考资料：

Integrate XML Publisher and OA Framework

Downloading Files in OAF (需翻墙)

XMLIntegrationCO