由于公司最近要通过钉钉审批连接后台系统，实现办公电子化，所以会出现这种需求

钉钉小程序提供的图片上传说明

dd.uploadFile({
  url: '请使用自己服务器地址',
  fileType: 'image',
  fileName: 'file',
  filePath: '...',
  success: (res) => {
    dd.alert({
      content: '上传成功'
    });
  },
});

封装后的代码

dd.showLoading({ content: "图片上传中..." });
    try {
      let bindThis = this;
      let promiseArr = [];
      for (let i = 0; i < this.data.moneyImages.length; i++) {
        let item = this.data.moneyImages[i];
        if (item.src != "添加" && item.upload == "0") {
          promiseArr.push(new Promise(function(resolve, reject) {
            dd.uploadFile({
              url: uploadUrl,
              filePath: item.src,
              fileName: 'test.jpeg',//随便写没有影响
              fileType: 'image',
              success: (res) => {
                console.log(res);
                let successData = JSON.parse(res.data);
                if (successData.success == false) {
                  reject(successData);
                } else {
                  item.upload = "1";
                  item.outPath = successData.result.outFilePath;
                  resolve();
                }
              },
              fail: (err) => {
                reject(err);
              }
            })
          })
          )
        }
      }
      Promise.all(promiseArr).then((res) => {
        dd.hideLoading();
        //提交表单到审批流程
        bindThis.startSubmitFormData();
      }).catch((error) => {
        console.log('失败')
        let code = error.code;
        dd.hideLoading();
        if (code != undefined) {
          dd.alert({
            title: '提示',
            content: error.message,
            buttonText: '好的',
          });
        } else {
          dd.alert({
            title: '提示',
            content: '图片上传失败，请点击提交重传',
            buttonText: '好的',
          });
        }
      })
    } catch (e) {
      dd.hideLoading();
      console.log(e)
    }

只是做了简单的封装，大家也可以封装成function然后方便调用，我是直接写在逻辑层了

对应的java后台代码也一并给出吧（此处是做了图片MD5校验的）

/**
     * 上传图片
     * @param params  请求参数
     * @param request 上传图片请求
     * @return
     */
    @RequestMapping(value = "/dingding/uploadImages",method = RequestMethod.POST)
    @ResponseBody
    public ServiceResult uploadImage(@RequestParam Map<String,Object> params, HttpServletRequest request){
        Map<String,Object> resultMap = new HashMap<>();
       "此处对应要转换成StandardMultipartHttpServletRequest，否则没法获取multifile对象请注意"
        StandardMultipartHttpServletRequest httpServletRequest = (StandardMultipartHttpServletRequest) request;
        Iterator<String> iterator = httpServletRequest.getFileNames();
        Boolean isHavePic = false;
        while (iterator.hasNext()) {
            MultipartFile file = httpServletRequest.getFile(iterator.next());
            String fileNames = file.getOriginalFilename();
            String imageMd5 = ImageMD5Util.getMd5(file);//图片的md5值
            P2pApprovalImage singleImage = imageDao.selectApproveImgae(imageMd5);
            if (singleImage!=null){
                isHavePic = true;
                break;
            }
        }
        ServiceResult service = null;
        if (isHavePic){
            service = ServiceResult.failure("201","图片重复，请勿重复提交申请");
        }else{
            Iterator<String> iteratorUpload = httpServletRequest.getFileNames();
            String isUploadSuccess = "";
            while (iteratorUpload.hasNext()) {
                MultipartFile file = httpServletRequest.getFile(iteratorUpload.next());
                String fileNames = file.getOriginalFilename();
                String imageMd5 = ImageMD5Util.getMd5(file);//图片的md5值
                P2pApprovalImage singleImage = imageDao.selectApproveImgae(imageMd5);
                bizLogger.info("存储文件==" + fileNames + "===存储路径" + filePath);
                isUploadSuccess = saveFile(file, filePath,imageMd5);
                if (isUploadSuccess.length()>0){
                    //上传失败
                    break;
                }
            }
            if (isUploadSuccess.length()>0){
                resultMap.put("outFilePath",isUploadSuccess);
                service = ServiceResult.success(resultMap);
            }else{
                service = ServiceResult.failure("202","图片上传失败，请重试");
            }
        }
        return service;
    }

有问题及时沟通吧，下面有我的联系方式。