下載下傳檔案名亂碼問題

核型代碼如下：

String fn = "中文檔案名檔案.doc";

            String userAgent = request.getHeader("User-Agent").toLowerCase();

            //Java下載下傳檔案時IE浏覽器出現檔案名亂碼

            // 針對IE或者以IE為核心的浏覽器：  

            if (userAgent.contains("msie") || userAgent.contains("trident") ) {  

                fn = java.net.URLEncoder.encode(fn, "UTF-8");  

            } else {  

                // 非IE浏覽器的處理：  

                fn = new String(fn.getBytes("UTF-8"), "ISO-8859-1");  

            }  

            response.setContentType("application/octet-stream");

            response.setHeader("Content-disposition", "attachment;filename=\"" + fn + "\"");