Vue-Dropzone没有"url“选项无法工作

<template>
  <vue-dropzone
    id="dropzone"
    ref="myDropzone"
    :options="dropzoneOptions"
    @vdropzone-success="onSuccess"
    @vdropzone-error="onError"
  >
    <div class="fallback">
      <input name="file" type="file" multiple />
    </div>
  </vue-dropzone>
</template>

<script>
import vueDropzone from 'vue2-dropzone';
import 'vue2-dropzone/dist/vue2Dropzone.min.css';

export default {
  components: {
    vueDropzone,
  },
  data() {
    return {
      dropzoneOptions: {
        url: '/upload', // 后端处理上传的URL
        maxFiles: 5,
        maxFilesize: 2, // MB
        acceptedFiles: '.jpg,.png',
        addRemoveLinks: true,
        dictDefaultMessage: '将文件拖到此处或点击上传',
      },
    };
  },
  methods: {
    onSuccess(file, response) {
      console.log('上传成功', file, response);
    },
    onError(file, errorMessage) {
      console.log('上传失败', file, errorMessage);
    },
  },
};
</script>

const express = require('express');
const multer = require('multer');

const app = express();
const upload = multer({ dest: 'uploads/' });

app.post('/upload', upload.single('file'), (req, res) => {
  // 处理上传文件逻辑
  // 可以使用req.file来访问上传的文件对象
  res.send('文件上传成功');
});

app.listen(3000, () => {
  console.log('服务器已启动');
});