求助 jsp 乱码

Question

filenamedisplay = URLEncoder.encode(filenamedisplay.toString());
response.addHeader("Content-Disposition","attachment;filename=" + filenamedisplay);
显示文件名 为?????
filenamedisplay = URLEncoder.encode(filenamedisplay.toString(),"UTF-8");网页无法显示
filenamedisplay  是从oracle 数据库中取出
存入格式为 filenamedisplay = new String(filenamedisplay.getBytes("ISO8859_1","UTF-8");请教高手帮忙解决阿

Answer 1

filenamedisplay = URLEncoder.decode(filenamedisplay.toString(),"UTF-8");要解码的

Answer 2

filenamedisplay = URLEncoder.decode(filenamedisplay.toString(),"UTF-8");
错误！
网页无法显示

Answer 3

原因是<%%>代码前后不能有空格或者换行!