/**
* Add IE AND Firefox 's support for chinese file name .
*/
if (fileName != null) {
   if (agent.indexOf("MSIE") != -1) {// ie
       String temp= URLEncoder.encode(fileName,"UTF-8");
       if(temp.length()>150)//IE 6.0 bug
          temp=new String(fileName.getBytes("GBK"),"ISO-8859-1");
          response.setHeader("Content-disposition", "attachment;filename="+ temp + ".ipPolicy.xml");
    } else {// firefox
       fileName = new String(fileName.getBytes("UTF-8"),"iso-8859-1");
        response.setHeader("Content-disposition", "attachment;filename="+ fileName + ".ipPolicy.xml");
    }
}