antd vue pro中使用customRequest，以FormData方式进行自定义上传图片，java后台接收_vue customrequest获取文件内容

1、vue部分

<a-upload
          :multiple="false"
          name="avatar"
          list-type="picture-card"
          class="avatar-uploader"
          :show-upload-list="false"
          :before-upload="beforeUpload"
          :customRequest="customRequest"
        >
          <img v-if="imageUrl" :src="imageUrl" alt="avatar" />
          <div v-else>
            <a-icon :type="loading ? 'loading' : 'plus'" />
            <div class="ant-upload-text">
              选择图片
            </div>
          </div>
        </a-upload>
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//上传前验证
    beforeUpload(file) {
      const isJpgOrPng = file.type === 'image/jpeg' || file.type === 'image/png';
      if (!isJpgOrPng) {
        this.$message.error('请上传图片文件');
      }
      const isLt2M = file.size / 1024 / 1024 < 20;
      if (!isLt2M) {
        this.$message.error('文件不得超过20M!');
      }
      return isJpgOrPng && isLt2M;
    },
    
 // 自定义上传
    customRequest(file){
      const form = new FormData()
      form.append('file', file.file)
      // 用自己的接口
      console.log(form);
      uploadImg(form).then(res => {
        console.log(res);
        if (res.success) {
          // 调用组件内方法, 设置为成功状态
          file.onSuccess(res, file.file)
          file.status = 'done'
          this.imageUrl = res.message;
        } else {
          file.onError()
          file.status = 'error'
        }
      })
    },
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api.js 里添加上传文件的请求

//上传文件
export function uploadImg (formdata) {
  return request({
    url: api.uploadImg,//后台访问的路径
    method: 'post',
    data: formdata,
    headers: { 'Content-Type': 'multipart/form-data' },//'Content-Type': 'multipart/form-data'
  })
}
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2、java后台：使用的jeecgboot框架的自带上传方法，懒得改直接贴上来了

 @RequestMapping(value = "uploadImg", method = RequestMethod.POST)
    public Result<?> upload(HttpServletRequest request,HttpServletRequest response) throws Exception {
        Result<?> result = new Result<>();
        String savePath = "";
        String bizPath = request.getParameter("biz");
        MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
        MultipartFile file = multipartRequest.getFile("file");// 获取上传文件对象
        savePath =  this.uploadLocal(file,bizPath);  //调用上传方法返回保存的路径
        if(oConvertUtils.isNotEmpty(savePath)){
            result.setMessage(savePath);
            result.setSuccess(true);
        }else {
            result.setMessage("上传失败！");
            result.setSuccess(false);
        }
        return result;
    }
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