Java 文件上传功能Controller

/**     * 通过kindeditor上传文件     * @param request     * @param response     * @return     */    @RequestMapping("/kindeditorJson")    @ResponseBody    public Object kindeditorJson(HttpServletRequest request, HttpServletResponse response) {        try {            Map<String, Object> resultMap = new HashMap<>();            MultipartHttpServletRequest mreq = (MultipartHttpServletRequest) request;            Iterator<String> fileNames = mreq.getFileNames();            MultipartFile file = null;            String fileName = null;            while (fileNames.hasNext()) {                fileName = (String) fileNames.next();                file = mreq.getFile(fileName);            }            if (file == null) {                return ResultModel.build(Constants.RESULT_STATUS_ERROR, Constants.RESULT_MESSAGE_ERROR);            }            fileName = file.getOriginalFilename();            String realPath = request.getSession().getServletContext().getRealPath("/attachment/kindeditor");            String dateFolder = DateFormatUtils.format(new Date(), "/yyyy/MM");            String folderPath = realPath + dateFolder;            FileUtils.createFolders(folderPath);            String extension = fileName.substring(fileName.lastIndexOf("."));            String saveName = DateFormatUtils.format(new Date(), "yyyyMMddHHmmssSSS") + Math.round(Math.random() * 1000 + 1);            String savePath = folderPath + "/" +saveName + extension;            file.transferTo(new File(savePath));            //图片生成缩略图            if (ImageUtil.isImage(savePath)) {                //this.thumbnailsImg(folderPath, saveName, extension, savePath);            }            String relativePath = "attachment/kindeditor/" + dateFolder + "/"                    + saveName + extension;            String urlType = request.getParameter("urlType");            // 返回图片url地址            String path = request.getContextPath();            String basePath = request.getScheme() + "://"                    + request.getServerName() + ":" + request.getServerPort()                    + path + "/";            resultMap.put("error", 0);            resultMap.put("fileName", fileName.substring(0, fileName.lastIndexOf(".")));            resultMap.put("url", StringUtils.isBlank(urlType) ? basePath + relativePath : "/" + relativePath);            resultMap.put("size", file.getSize());            resultMap.put("path", relativePath);            return JsonUtil.objectToJson(resultMap);        } catch (Exception e) {            logger.error(e.getMessage(), e);        }        return ResultModel.build(Constants.RESULT_STATUS_ERROR, Constants.RESULT_MESSAGE_ERROR);    }