npm install vuedraggable
npm install sortablejs

import draggable from 'vuedraggable';
import Sortable from 'sortablejs';

export default {
  components: {
    draggable,
    Sortable
  },
  ....

<Row class="draggableTable-head">
  <Col span="1">序号</Col>
  <Col span="2">商品条码</Col>
  <Col span="3">商品名称</Col>
  <Col span="1">单位</Col>
</Row>
<draggable class="list-group" v-model="tableData" :options="{draggable:'.rows'}"
  :move="getdata" @update="datadragEnd">
  <Row class="rows" v-for="(item,index) in tableData" :key="index">
    <Col span="1">
      <div class="cell">{{index+1}}</div>
    </Col>
    <Col span="2">
      <div class="cell">{{item.barCode}}</div>
    </Col>
    <Col span="2">
      <div class="cell">{{item.name}}</div>
    </Col>
    <Col span="2">
      <div class="cell">{{item.unit}}</div>
    </Col>
  </Row>
</draggable>

getdata (data) {
  // console.log('getdata方法');
},
datadragEnd (evt) {
  // console.log('datadragEnd方法');
  console.log('拖动前的索引 :' + evt.oldIndex)
  console.log('拖动后的索引 :' + evt.newIndex)
}