struts2 下载 文件名 乱码

import org.apache.commons.codec.binary.Base64;public String fileNameFixer(String fileName){String agent = (String)request.getHeader("USER-AGENT"); String enableFileName = "";try{if(agent != null && agent.indexOf("MSIE") == -1) {// FF   enableFileName = "=?UTF-8?B?" + (new String(Base64.encodeBase64(fileName.getBytes("UTF-8")))) + "?=";}else {enableFileName = new String(fileName.getBytes("GBK"), "ISO-8859-1");}}catch(UnsupportedEncodingException e){System.out.println("不支持的编码方式");e.printStackTrace();}  return enableFileName;}

? 关于servlet的处理方式，请见http://wzwd111.iteye.com/blog/1073796