public ActionForward preChangeAccountPwd(ActionMapping mapping,			ActionForm form, HttpServletRequest request,			HttpServletResponse response) throws Exception {               // 向页面返回添加帐号结果		response.setCharacterEncoding("UTF-8");		response.setContentType("text/html; charset=UTF-8");		PrintWriter  pw = response.getWriter();		pw.write(result);		pw.close();                return null;}        

response.setHeader("Content-disposition","attachment;filename=temp.xls"); response.setContentType("application/octet-stream");ServletOutputStream os = response.getOutputStream();NetWorkForm uf = (NetWorkForm)form;FormFile ff = uf.getNetFile();InputStream in = ff.getInputStream();HSSFWorkbook wb = new HSSFWorkbook(in);HSSFSheet sheet = wb.getSheetAt(0);int rowNum = sheet.getLastRowNum();××workbook.write(os);os.close();in.close();return null;========================OutputStream os = response.getOutputStream();response.setContentType("application/vnd.ms-excel");response.setHeader("Content-disposition", "attachment; filename="+ fileName+ ".xls");// 第一步，创建一个webbook，对应一个Excel文件HSSFWorkbook wb = new HSSFWorkbook();××wb.write(os);os.close();response.setContentType("text/xml;charset=utf-8");return null;