excel下载中文乱码

 String oriFileName = "我是文件名";
 response.setContentType("application/vnd.ms-excel");
 response.setCharacterEncoding("utf-8");
 String fileName = URLEncoder.encode(oriFileName , "UTF-8").replaceAll("\\+", "%20");
 response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");