文件写出web头部设置

271788203

if(rpt!=null){       response.reset();       boolean isDownload = "download".equalsIgnoreCase(request.getParameter("mode"));           String mode = isDownload ? "attachment" : "inline";           response.setContentType("APPLICATION/DOWNLOAD");                      response.setHeader("Content-Disposition",mode+";filename=" +downloadFileName+"."+getReportExtension(reportFormat));                     response.setHeader("Pragma", "public");           response.setDateHeader("Expires", 0);           response.setHeader("Cache-Control","must-revalidate,post-check=0,pre-check=0");           try {OutputStream os = null;response.setContentLength(rpt.length);os = response.getOutputStream();os.write(rpt);os.close();response.flushBuffer();return null;} catch (Exception e) {e.printStackTrace();}            } rpt为要输出文件的字节数组：byte[] rpt=xxx；
说明：
1、response.reset();        清除buffer
2、response.setHeader("Content-disposition","attachment;filename="+new String(str.getBytes("gb2312"),"iso8859-1")); //客户使用目标另存为对话框保存指定文件
3、response.setHeader("Content_Length",length);设置头文件的长度为指定文件的长度