文件下载文件名乱码解决

if(request.getHeader("User-Agent").toUpperCase().indexOf("MSIE") > 0){
    response.setHeader("Content-disposition", "attachment; filename="
            + URLEncoder.encode(product.getRealName1(), "UTF-8"));
    }else{
        response.setHeader("Content-disposition", "attachment; filename="
            + new String(product.getRealName1().getBytes("utf-8"), "ISO8859-1"));
}