基于SSM框架的多文件上传Controller类编写

前端代码

<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="width: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类

@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;
  }
}