多文件上传

<form id="fileupload" action="/rest/pic/upload" method="POST" enctype="multipart/form-data">
        <!-- Redirect browsers with JavaScript disabled to the origin page -->
        <noscript><input type="hidden" name="redirect" value="https://blueimp.github.io/jQuery-File-Upload/"></noscript>
        <!-- The fileupload-buttonbar contains buttons to add/delete files and start/cancel the upload -->
        <div class="row fileupload-buttonbar">
            <div class="col-lg-7">
                <!-- The fileinput-button span is used to style the file input field as button -->
                <span class="btn btn-success fileinput-button">
                    <i class="glyphicon glyphicon-plus"></i>
                    <span>选择文件(多选)</span>
                    <input type="file" name="uploadFile" multiple="multiple">
                </span>
                <button type="submit" class="btn btn-primary start">
                    <i class="glyphicon glyphicon-upload"></i>
                    <span>开始上传</span>
                </button>
                <button type="reset" class="btn btn-warning cancel">
                    <i class="glyphicon glyphicon-ban-circle"></i>
                    <span>取消上传</span>
                </button>
                <button type="button" class="btn btn-danger delete">
                    <i class="glyphicon glyphicon-trash"></i>
                    <span>删除</span>
                </button>
                <input type="checkbox" class="toggle" title="全选">
                <!-- The global file processing state -->
                <span class="fileupload-process"></span>
            </div>
            <!-- The global progress state -->
            <div class="col-lg-5 fileupload-progress fade">
                <!-- The global progress bar -->
                <div class="progress progress-striped active" role="progressbar" aria-valuemin="0" aria-valuemax="100">
                    <div class="progress-bar progress-bar-success" style="0%;"></div>
                </div>
                <!-- The extended global progress state -->
                <div class="progress-extended"> </div>
            </div>
        </div>
        <!-- The table listing the files available for upload/download -->
        <table role="presentation" class="table table-striped"><tbody class="files"></tbody></table>
    </form>

Controller  层

@Controller
@RequestMapping("pic")
public class FileUploadUtil{

    private static final Logger LOGGER = Logger.getLogger(FileUploadUtil.class);
       @Value(value = "${IMAGE_BASE_URL}")
        private String IMAGE_BASE_URL;
        private String REPOSITORY_PATH;
        private static final ObjectMapper mapper = new ObjectMapper();

        @Autowired
        private ExportService exportService;
        // 允许上传的格式
        private static final String[] IMAGE_TYPE = new String[] { ".bmp", ".jpg", ".jpeg", ".gif", ".png" };

        @RequestMapping(value = "/upload", method = RequestMethod.POST)
        @ResponseBody
        public String upload(@RequestParam("uploadFile") MultipartFile[] uploadFile , HttpServletRequest request,HttpServletResponse response) throws Exception {
            REPOSITORY_PATH = request.getSession().getServletContext().getRealPath("upload");
            MultipartFile multipartFile = null;
            boolean isLegal = false;
            List<PicUploadResult> fileUploadResult = new ArrayList<>();
            PicUploadResult pic = null;
            ExportExcelConfig eec = new ExportExcelConfig();
            String urls = "";
            for (int i = 0; i < uploadFile.length; i++) {
                multipartFile = uploadFile[i];
                // 校验图片格式
                for (String type : IMAGE_TYPE) {
                    if (StringUtils.endsWithIgnoreCase(multipartFile.getOriginalFilename(), type)) {
                        isLegal = true;
                        break;
                    }
                }

                // 封装Result对象，并且将文件的byte数组放置到result对象中
                pic = new PicUploadResult();

                // 状态
                pic.setError(isLegal ? 0 : 1);

                // 文件新路径
                String filePath = getFilePath(multipartFile.getOriginalFilename());

                if (LOGGER.isDebugEnabled()) {
                    LOGGER.debug("Pic file upload .[{}] to [{}] ."+multipartFile.getOriginalFilename());
                }

                // 生成图片的绝对引用地址
                String picUrl = StringUtils.replace(StringUtils.substringAfter(filePath,REPOSITORY_PATH), "\", "/");
                pic.setUrl(IMAGE_BASE_URL + picUrl);

                File newFile = new File(filePath);

                // 写文件到磁盘
                multipartFile.transferTo(newFile);

                // 校验图片是否合法
                isLegal = false;
                try {
                    BufferedImage image = ImageIO.read(newFile);
                    if (image != null) {
                        pic.setWidth(image.getWidth() + "");
                        pic.setHeight(image.getHeight() + "");
                        isLegal = true;
                    }
                } catch (IOException e) {
                }

                // 状态
                pic.setError(isLegal ? 0 : 1);
                if(pic.getError()==0){
                    urls+=pic.getUrl();
                    if(i<2)
                    urls+=",";
                }
                if (!isLegal) {
                    // 不合法，将磁盘上的文件删除
                    newFile.delete();
                }
                fileUploadResult.add(pic);
            }
            eec.setUrl(urls);
            eec.setCreateTime(new Date());
            exportService.addConfigInfo(eec);
            response.setContentType(MediaType.TEXT_HTML_VALUE);
            return mapper.writeValueAsString(fileUploadResult);
        }

        private String getFilePath(String sourceFileName) {
            String baseFolder = REPOSITORY_PATH;
            Date nowDate = new Date();
            // yyyy/MM/dd
            String fileFolder = baseFolder + File.separator + new DateTime(nowDate).toString("yyyy") + File.separator + new DateTime(nowDate).toString("MM") + File.separator
                    + new DateTime(nowDate).toString("dd");
            File file = new File(fileFolder);
            if (!file.isDirectory()) {
                // 如果目录不存在，则创建目录
                file.mkdirs();
            }
            // 生成新的文件名
            String fileName = new DateTime(nowDate).toString("yyyyMMddhhmmssSSSS") + RandomUtils.nextInt(100, 9999) + "." + StringUtils.substringAfterLast(sourceFileName, ".");
            return fileFolder + File.separator + fileName;
        }
}