文件上传

// 通过MultipartFile获取上传的单个文件流 

public @ResponseBody String uploadFile(@RequestParam(value = "file", required = false) MultipartFile mFile, String relativedId, 
            String strRelativedType, String strDesc) {
        ResponseData ajaxObject = new ResponseData();
        try {
            NjAttach attach = attachService.uploadFile(mFile, relativedId, strRelativedType, strDesc);
            ajaxObject.setMessage(attach.getStrName() + "文件上传成功");
            ajaxObject.setStatusCode(AjaxObject.STATUS_CODE_SUCCESS);
            Map<String, Object> fileInfo = new HashMap<String, Object>();
            fileInfo.put("id", attach.getId());
            fileInfo.put("strName", attach.getStrName());
            fileInfo.put("doubleSize", attach.getDoubleSize());
            fileInfo.put("strDocType", attach.getStrDocType());
            fileInfo.put("strPath", attach.getStrPath());
            fileInfo.put("relativedId", relativedId);
            ajaxObject.setData(fileInfo);
        }catch (ServiceException e) {
            log.error(e);
            ajaxObject.setStatusCode(AjaxObject.STATUS_CODE_FAILURE);
            ajaxObject.setMessage(e.getMessage());
        } catch (Exception e) {
            log.error(e);
            ajaxObject.setStatusCode(AjaxObject.STATUS_CODE_FAILURE);
            ajaxObject.setMessage("系统错误，上传文件失败");
        }
        return ajaxObject.toString();
    }

//通过HttpServletRequest获取文件流

public String uploadListFile(HttpServletRequest request, String relativedId, String relativedType) {
    AjaxObject ajaxObject = new AjaxObject();
    try {
        MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;
        Map<String, MultipartFile> files = multiRequest.getFileMap();
        String attachIds = attachService.uploadListFile(files, relativedId, relativedType);
        ajaxObject.setRel(attachIds);
        ajaxObject.setMessage("上传成功");
    } catch (Exception e) {
        e.printStackTrace();
        ajaxObject.setStatusCode(AjaxObject.STATUS_CODE_FAILURE);
        ajaxObject.setMessage("上传失败");
    }
    return ajaxObject.toString();
}