jsp:jsp页面：
     

@RequestMapping("core/upload!uploadFile.action")    public void uploadFile(@RequestParam(value = "uploadify", required = false) MultipartFile uploadify,HttpServletRequest request,HttpServletResponse response,ModelMap modelMap) throws Exception {        @SuppressWarnings("deprecation")        String savePath = request.getRealPath("/")+ "/" + "upload/";        String saveUrl = "upload/";        HashMap
     
       extMap = new HashMap
      
       ();        extMap.put("file", "pdf,rar,zip,7z,gif,jpg,jpeg,png,bmp,doc,docx,xlsx,xls");        //extMap.put("image", "gif,jpg,jpeg,png,bmp");        extMap.put("csv", "csv");         int uploadMaxSize =Integer.valueOf(optionService.getByOptionName(CoreValue.OPTION_UPLOAD_MAX_SIZE).getOptionValue());        long maxSize = Long.valueOf(String.valueOf(uploadMaxSize)).longValue();        String maxSizeKb = StringUtil.formatNumber(new Double(maxSize / 1024L),"0");        response.setContentType("text/html; charset=UTF-8");        String jsonString = "";        if (!ServletFileUpload.isMultipartContent(getRequest())) {            jsonString = getError("请选择文件。");            response.getWriter().println(jsonString);            return;        }        File uploadDir = new File(savePath);        if (!uploadDir.isDirectory()) {            jsonString = getError(savePath + "上传目录不存在。");            response.getWriter().println(jsonString);            return;        }        if (!uploadDir.canWrite()) {            jsonString = getError("上传目录没有写权限。");            response.getWriter().println(jsonString);            return;        }        String dirName = getRequest().getParameter("dir");        if (dirName == null) {            dirName = "file";        }        if (!extMap.containsKey(dirName)) {            jsonString = getError("目录名不正确。");            response.getWriter().println(jsonString);            return;        }        savePath = savePath + dirName + "/";        saveUrl = saveUrl + dirName + "/";        File saveDirFile = new File(savePath);        if (!saveDirFile.exists()) {            saveDirFile.mkdirs();        }        SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");        String ymd = sdf.format(new Date());        savePath = savePath + ymd + "/";        saveUrl = saveUrl + ymd + "/";        File dirFile = new File(savePath);        if (!dirFile.exists()) {            dirFile.mkdirs();        }        String fileName = uploadify.getOriginalFilename();        long fileSize = uploadify.getSize();        if (fileSize > maxSize) {            jsonString = getError("上传文件大小超过限制。最大为" + maxSizeKb + "kb");            response.getWriter().println(jsonString);            return;        }        String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();                    if (!Arrays.asList(((String) extMap.get(dirName)).split(",")).contains(fileExt)) {            jsonString = getError("不允许的上传文件类型。");            response.getWriter().println(jsonString);            return;        }        SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");        String newFileName = df.format(new Date()) + "_"+ new Random().nextInt(1000) + "." + fileExt;        File uploadedFile = null;        try {            uploadedFile = new File(savePath, newFileName);            if(uploadedFile.exists()){                            }            if(!uploadedFile.exists()){                uploadedFile.mkdirs();            }            uploadify.transferTo(uploadedFile);        } catch (Exception e) {            jsonString = getError("上传文件失败。");            response.getWriter().println(jsonString);            return;        }        JSONObject obj = new JSONObject();        obj.put("error", Integer.valueOf(0));        obj.put("url", saveUrl + newFileName);        obj.put("newFileName", newFileName);        obj.put("fileName", fileName);        jsonString = obj.toJSONString();        response.getWriter().println(jsonString);    }    private String getError(String message) {        JSONObject obj = new JSONObject();        obj.put("error", Integer.valueOf(1));        obj.put("message", message);        return obj.toJSONString();    }