/** *//** * 实现文件另存功能 * * @param text * 文件内容 * @param fileName * 文件名称 * @return */ protected String renderFile(String text, String fileName) throws IOException { response.addHeader("Content-Disposition", "attachment; filename=" + fileName); response.setContentType("application/octet-stream"); response.setCharacterEncoding("GB2312"); response.getWriter().write(text); response.flushBuffer(); response.getWriter().close(); return null; }

/** *//** * 提供下载的方法 * @return */ public String down() { String dir = getFullPath() + "/upload/file/"; try { if (!FileUtils.exists(dir)) { new File(dir).mkdirs(); } Random r = new Random(System.currentTimeMillis()); Integer randomInt = r.nextInt(); this.renderFile("test content:" + randomInt,randomInt + ".txt"); } catch (IOException e) { e.printStackTrace(); this.renderText(e.getMessage()); } return null; }

<a href="${ctx}/va/va!down.do" >下载</a>