以下代碼在 chrome、firefox,安卓自帶手機瀏覽器上測試通過,但未經過完全測試,先記錄下
public static void downLoadFile(HttpServletRequest request,HttpServletResponse response,String fullPath,String fileName) throws IOException { OutputStream outp = response.getOutputStream(); File file = new File(fullPath); if (file.exists()) { response.setContentType("APPLICATION/OCTET-STREAM");
//response.setContentType("application/octet-stream; charset=utf-8"); String filedisplay = fileName; String agent = (String)request.getHeader("USER-AGENT"); if(agent != null && ( agent.indexOf("MSIE") != -1 || agent.indexOf("Trident") != -1 || agent.indexOf("Mobile") != -1 )) { //移動瀏覽器 或 ie Trident是標識是ie瀏覽器 特別處理ie11 的問題 filedisplay=URLEncoder.encode(filedisplay,"utf-8"); System.out.println("下載文件,移動設備瀏覽器 或 ie[" + filedisplay + "]"); response.addHeader("Content-Disposition", "attachment;filename=" + filedisplay); } else {
//其他瀏覽器 String enableFileName = "=?UTF-8?B?" + (new String(Base64.getBase64(filedisplay))) + "?="; System.out.println("下載文件,其他瀏覽器[" + enableFileName + "]"); response.setHeader("Content-Disposition", "attachment; filename=" + enableFileName); } FileInputStream in = null; try { outp = response.getOutputStream(); in = new FileInputStream(fullPath); byte[] b = new byte[1024]; int i = 0; while ((i = in.read(b)) > 0) { outp.write(b, 0, i); } outp.flush(); } catch (Exception e) { e.printStackTrace(); } finally { if (in != null) { in.close(); in = null; } if (outp != null) { outp.close(); outp = null; response.flushBuffer(); } } } else { outp.write("文件不存在!".getBytes("utf-8"));
outp.close(); } }
/** * 獲取下載文件的content-type類型。 * * @param extName 文件后綴 * @return */ private String getContextType(String extName, boolean isRead) { String contentType = "application/octet-stream"; if ("jpg".equalsIgnoreCase(extName) || "jpeg".equalsIgnoreCase(extName)) { contentType = "image/jpeg"; } else if ("png".equalsIgnoreCase(extName)) { contentType = "image/png"; } else if ("gif".equalsIgnoreCase(extName)) { contentType = "image/gif"; } else if ("doc".equalsIgnoreCase(extName) || "docx".equalsIgnoreCase(extName)) { contentType = "application/msword"; } else if ("xls".equalsIgnoreCase(extName) || "xlsx".equalsIgnoreCase(extName)) { contentType = "application/vnd.ms-excel"; } else if ("ppt".equalsIgnoreCase(extName) || "pptx".equalsIgnoreCase(extName)) { contentType = "application/ms-powerpoint"; } else if ("rtf".equalsIgnoreCase(extName)) { contentType = "application/rtf"; } else if ("htm".equalsIgnoreCase(extName) || "html".equalsIgnoreCase(extName)) { contentType = "text/html"; } else if ("swf".equalsIgnoreCase(extName)) { contentType = "application/x-shockwave-flash"; } else if ("bmp".equalsIgnoreCase(extName)) { contentType = "image/bmp"; } else if ("mp4".equalsIgnoreCase(extName)) { contentType = "video/mp4"; } else if ("wmv".equalsIgnoreCase(extName)) { contentType = "video/x-ms-wmv"; } else if ("wm".equalsIgnoreCase(extName)) { contentType = "video/x-ms-wm"; } else if ("rv".equalsIgnoreCase(extName)) { contentType = "video/vnd.rn-realvideo"; } else if ("mp3".equalsIgnoreCase(extName)) { contentType = "audio/mp3"; } else if ("wma".equalsIgnoreCase(extName)) { contentType = "audio/x-ms-wma"; } else if ("wav".equalsIgnoreCase(extName)) { contentType = "audio/wav"; } if ("pdf".equalsIgnoreCase(extName) && isRead)// txt不下載文件,讀取文件內容 { contentType = "application/pdf"; } if (("sql".equalsIgnoreCase(extName) || "txt".equalsIgnoreCase(extName)) && isRead)// pdf不下載文件,讀取文件內容 { contentType = "text/plain"; } return contentType; }
其他參考,但未經驗證
http 下載文件時,中文文件名在firefox下亂碼的問題,一般在http header中是這樣操作的:
"Content-Disposition","attachment;filename=文件名.xx" 其實,按照 rfc231 , Content-Disposition 應該按照如下格式設置: "Content-Disposition","attachment;filename*=utf-8'zh_cn'文件名.xx" 只要嚴格按照標准設置以后,自然在各種瀏覽器下都會正常運行了.
String userAgent = request.getHeader("User-Agent"); String rtn = ""; try { String new_filename = URLEncoder.encode(fileName, "UTF8"); // 如果沒有UA,則默認使用IE的方式進行編碼,因為畢竟IE還是占多數的 rtn = "filename=\"" + new_filename + "\""; if (userAgent != null) { userAgent = userAgent.toLowerCase(); // IE瀏覽器,只能采用URLEncoder編碼 if (userAgent.indexOf("msie") != -1) { rtn = "filename=\"" + new_filename + "\""; } // Opera瀏覽器只能采用filename* else if (userAgent.indexOf("opera") != -1) { rtn = "filename*=UTF-8''" + new_filename; } // Safari瀏覽器,只能采用ISO編碼的中文輸出 else if (userAgent.indexOf("safari") != -1) { rtn = "filename=\"" + new String(fileName.getBytes("UTF-8"), "ISO8859-1") + "\""; } // Chrome瀏覽器,只能采用MimeUtility編碼或ISO編碼的中文輸出 else if (userAgent.indexOf("applewebkit") != -1) { new_filename = MimeUtility.encodeText(fileName, "UTF8", "B"); rtn = "filename=\"" + new_filename + "\""; } // FireFox瀏覽器,可以使用MimeUtility或filename*或ISO編碼的中文輸出 else if (userAgent.indexOf("mozilla") != -1) { rtn = "filename*=UTF-8''" + new_filename; } } } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return rtn;