<input type="file">，请问后台如何获取前端选择的这个file对象？

Question

<input type="file">，请问后台如何获取前端页面选择的这个file对象并做处理？

Answer 1

@RequestMapping(value = "/saveFile", method = RequestMethod.POST)
@ResponseBody
public ResultData saveFile(@RequestParam(value="file",required=false) MultipartFile file, HttpServletRequest request) {
    ResultData resultData = new ResultData();
    HelpUtils.log_info(this.getClass(), "---------公共保存附件--------- ");

    String publishTime = request.getParameter("publishTime");
    if(StringUtils.isBlank(publishTime)){
        resultData.setErrorStatus(1, "通知附件上传发布时间不能为空");
        return resultData;
    }

    if(publishTime.equals("NOW")){
        publishTime = DateUtil.format(new Date());
    }

    try {
        UploadFileResp resp = picBusiness.uploadFile(file, publishTime);
        resultData.setData(resp);
        resultData.setSuccessStatus();
    } catch (Exception e) {
        HelpUtils.log_error(this.getClass(), "保存附件异常：", e);
        resultData.setErrorStatus(1, e.getMessage());
    }
    HelpUtils.log_info(this.getClass(), "保存附件响应参数：{}", JSONObject.toJSONString(resultData));
    return resultData;
}