解决下载乱码问题

上篇文章解决了IE8下fileupload上传的问题，这篇文章写的是下载文件 文件名称乱码问题。 从网上找了 一些资料解决了乱码 具体代码如下：

@RequestMapping("/download")
		public ModelAndView download(HttpServletRequest request, HttpServletResponse response)
				throws Exception {

			response.setContentType("text/html;charset=utf-8");
			request.setCharacterEncoding("UTF-8");
			BufferedInputStream bis = null;
			BufferedOutputStream bos = null;
			String fileId = request.getParameter("fileId");
			AttachmentBean attachment = attachmentService.getAttachmentById(fileId);
			Properties _props = ReadPropertiesUtil.props("uploadfile.properties");
			String curProjectPath = request.getSession().getServletContext().getRealPath("/");
//			String curProjectPath =  _props.get("filePath").toString();
			String downLoadPath = curProjectPath +"/" + uploadFolderName;
			System.out.println(downLoadPath);
			try {
				File file = new File(downLoadPath+"/"+attachment.getFileName());
				if(file.exists()){
					long fileLength = file.length();
//					response.setContentType("application/x-msdownload;");
					response.setContentType("application/octet-stream; charset=utf-8");
//					response.setHeader("Content-disposition", "attachment; filename="
//							+ new String(attachment.getFileName().getBytes("utf-8"), "utf-8"));
					response.setHeader("Content-disposition", "attachment;"+ encodeFileName(request,attachment.getFileName()));
					response.setHeader("Content-Length", String.valueOf(fileLength));
					
					bis = new BufferedInputStream(new FileInputStream(file));
					bos = new BufferedOutputStream(response.getOutputStream());
					byte[] buff = new byte[2048];
					int bytesRead;
					while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
						bos.write(buff, 0, bytesRead);
					}
				}
				
			} catch (Exception e) {
				e.printStackTrace();
			} finally {
				if (bis != null)
					bis.close();
				if (bos != null)
					bos.close();
			}
			return null;
		}
		public static String encodeFileName(HttpServletRequest request, String fileName) {
		    String userAgent = request.getHeader("User-Agent");
		    String rtn = "";
		    try {
		        String new_filename = URLEncoder.encode(fileName, "UTF8");
		        // 如果没有UA，则默认使用IE的方式进行编码，因为毕竟IE还是占多数的
		        rtn = "filename=\"" + new_filename + "\"";
		        if (userAgent != null) {
		            userAgent = userAgent.toLowerCase();
		            // IE浏览器，只能采用URLEncoder编码
		            if (userAgent.indexOf("msie") != -1) {
		                rtn = "filename=\"" + new_filename + "\"";
		            }
		            // Opera浏览器只能采用filename*
		            else if (userAgent.indexOf("opera") != -1) {
		                rtn = "filename*=UTF-8''" + new_filename;
		            }
		            // Safari浏览器，只能采用ISO编码的中文输出
		            else if (userAgent.indexOf("safari") != -1) {
		                rtn = "filename=\"" + new String(fileName.getBytes("UTF-8"), "ISO8859-1") + "\"";
		            }
		            // Chrome浏览器，只能采用MimeUtility编码或ISO编码的中文输出
		            else if (userAgent.indexOf("applewebkit") != -1) {
		                new_filename = MimeUtility.encodeText(fileName, "UTF8", "B");
		                rtn = "filename=\"" + new_filename + "\"";
		            }
		            // FireFox浏览器，可以使用MimeUtility或filename*或ISO编码的中文输出
		            else if (userAgent.indexOf("mozilla") != -1) {
		                rtn = "filename*=UTF-8''" + new_filename;
		            }
		        }
		    } catch (UnsupportedEncodingException e) {
		        e.printStackTrace();
		    }
		    return rtn;
		}

上面的代码解决多个浏览的乱码问题 目前包括IE8、Firefox、谷歌浏览器一些主流浏览器。