关于<T> T[] toArray(T[] a) 方法

    private List<String> uploadNoticeOtherFile(HttpServletRequest request,
            MultipartFile[] noticeOtherFiles, User user,
            ServletContext servletContext) {
        List<String> fileList = new ArrayList<String>();
        if(noticeOtherFiles != null && noticeOtherFiles.length > 0 && noticeOtherFiles[0].getSize() > 0){
            List<FileEntity> fileEntityList = null;
            try {
                //文件去空
                List<MultipartFile> noticeOtherFileList = new ArrayList<MultipartFile>();
                for (int i = noticeOtherFiles.length; i > 0; i--) {
                    MultipartFile noticeOtherFile = noticeOtherFiles[i];
                    if(noticeOtherFile != null && !noticeOtherFile.isEmpty() && noticeOtherFile.getSize() > 0 && !StringUtils.isBlank(noticeOtherFile.getName())){
                        noticeOtherFileList.add(noticeOtherFile);
                    }
                }
                
                fileEntityList = UploadFileUtils.uploadFiles(request, noticeOtherFileList.toArray(new MultipartFile[noticeOtherFileList.size()]), NoticeDictMailAttachTpl.BUSINESS_NAME, user.getId());
            } catch (FileUploadException e) {
                logger.error(e.getMessage());
                e.printStackTrace();
            }
            if(fileEntityList != null && fileEntityList.size() > 0){
                for(FileEntity fileEntity : fileEntityList)
                fileList.add(fileEntity.getFilePath());
            }
        }
        return fileList;
    }