VAR data = {
    code:GetRequest().code,
    file:file.content
}
axios({
   method:'post',
   url:'/app/face/upload',
  data:qs.stringify(data)
})

    <div id="app">
        <div style="display:flex;    
        justify-content: center;
        align-items: center;
        width: 100vw;
        height: 100vh;">
            <div>
              <van-uploader v-model="fileList" upload-text='人脸正面照' :max-count="1" :after-read="afterRead" ></van-uploader>
              <p style="text-align:center;font-Size:15px;" v-if="data">学号/工号：{{data}}</p>
            </div>
          </div>
      </div>
 
  <script>
   var app = new Vue({
    el: '#app',
    data: {
      fileList: [],
      data:'',
    },
    methods:{
      afterRead(file) {
      //上传中，添加上传中的状态提示 status 为uploading
        file.status = 'uploading';
        file.message = '上传中...';
        var data = {
            code:this.$route.query.code,
            file:file.content
          }
        axios({
          method:'post',
          url:'app/face/upload',
          data:{
            code:GetRequest().code,
            file:file.content
          }
        }).then((res)=>{
        //请求返回，并且已经获取到成功的状态，设置上传成功的提示 status 为done
          if(res.data.code == 0){
            file.status = 'done';
            file.message = '';
            this.data = res.data.data.userNo
            this.$notify({ tyPE: 'success', message: '上传成功' });
            
          //请求返回，接受到上传失败的提示 status为failed
          }else{
            file.status = 'failed';
            file.message = '上传失败';
           this.$notify({ type: 'warning', message: res.data.msg });
           this.data = ''
          }
        }).catch(()=>{
          file.status = 'failed';
          file.message = '上传失败';
          this.data = ''
        })
      },
    }
  })
  </script>