Java下载Excel兼容性问题

		String fileName = "Excel模板";
        String userAgent = request.getHeader("USER-AGENT").toLowerCase();
        if (userAgent != null) {
            if (userAgent.indexOf("msie") > -1 || userAgent.contains("like gecko")) {    //// win10 ie edge 浏览器 和其他系统的ie
                response.setHeader("Content-disposition", "attachment; filename="
                        + java.net.URLEncoder.encode((fileName + ".xls"), "utf-8"));
                response.setCharacterEncoding("UTF-8");
            } else { //其他浏览器   火狐  chrome, safari 下载文件名乱码问题
                response.setHeader("Content-disposition", "attachment; filename="
                        + new String((fileName + ".xls").getBytes("UTF-8"), "ISO-8859-1"));
                response.setCharacterEncoding("ISO-8859-1");
            }
        } else {
            response.setHeader("Content-disposition", "attachment; filename="
                    + java.net.URLEncoder.encode((fileName + ".xls"), "utf-8"));
            response.setCharacterEncoding("UTF-8");
        }
        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/x-download charset=UTF-8");
        Workbook wb = new HSSFWorkbook();
        OutputStream outputStream = null;
        try {
            wb = bOMExportService.exportExcelModel(functionId);
            outputStream = response.getOutputStream();
            outputStream.flush();
        } catch (Exception e) {
            LOGGER.error(e.getMessage(), e);
        } finally {
            try {
                wb.write(outputStream);
                wb.close();
                outputStream.close();
            } catch (Exception e) {
	            LOGGER.error(e.getMessage(), e);
            }
        }