HttpServletResponse response配置

import javax.servlet.http.HttpServletResponse;


  //清空response 清除首部的空白行
  response.reset();

            String filename = new String(fileName.getBytes(), "iso8859-1") + dateFormat.format(new Date().getTime())+".xls";
            response.addHeader("Content-Disposition", "attachment;filename=" + filename);

            response.setContentType("application/vnd.ms-excel;charset=gb2312");





PDF
            response.addHeader("Content-Disposition", "attachment;filename=FuWuOrder.pdf");
            response.setContentType("application/pdf;charset=UTF8");

Content-type  擴展名對照表

http://tool.oschina.net/commons/                                                http://tools.jb51.net/table/http_content_type