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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FQ)
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原文地址：http://www.cnblogs.com/huanghongbo/p/4663757.html
