Ajaxベースのフォームデータ画像とデータのアップロード

<template>
  <p class="newproduct">    
    <p class="topbox">
       <p class="shopbox">     
        <img class="shopicon" src="../../assets/head.jpg">
        <p class="shopname">开心就好的小店</p>
      </p>
    </p>
    <p class="goodsbox">
      <p class="startleft namebox">
        <label class="title">商品名称：</label><input class="noborder" v-model="goodsname" placeholder="请输入商品名称">
      </p>
      <p class="startleft goodstypebox">
        <label class="title">商品类型：</label>
        <select v-model="goodstype">
          <option value="请选择">请选择</option>
          <option value="图书">图书</option>
          <option value="卡券">卡券</option>
          <option value="服装">服装</option>
          <option value="礼品">礼品</option>
          <option value="运动装备">运动装备</option>
          <option value="电子设备">电子设备</option>
          <option value="日用百货">日用百货</option>
          <option value="其他">其他</option>
        </select>
      </p>      
      <p class="startleft describebox">
        <label class="title">商品描述</label>       
      </p class="startleft">
       <textarea class="describeinfo" v-model="goodsinfo"></textarea>
      <p class="startleft">
        <label class="title">单价:</label>
        <input class="noborder" placeholder="请输入单价" v-model="price">
      </p>
      <p class="startleft">
        <label class="title">数量:</label>
        <input class="noborder" placeholder="请输入数量" v-model="number">
      </p>
      <p class="startleft">
        <label class="title">联系电话:</label>
        <input class="noborder" placeholder="请输入手机号" v-model="phone">
      </p>
      <p class="startleft">
        <label class="title">地址:</label>
        <input class="noborder" placeholder="请输入地址" v-model="address">
      </p>
      <p class="startleft">
        <label class="title">图片</label>
        <img src="">
        <img src="">      
      </p>      
      <p class="addimg">
        <p class="imgbox">
          <img class="goodsimg" src="../../assets/addimg.png">
          <input id="file" type="file" class="fileupload" accept="image/*" multiple capture="camera" @change="viewimg()"/>
        </p>

        <p class="imgbox">
          <img class="goodsimg" src="../../assets/addimg.png">
          <input type="file" class="fileupload" accept="image/*" capture="camera" @change="viewimg()"/>
        </p> 
      </p>
    </p>
    <p class="bottombox" :style="{&#39;top&#39;:(height-12) + &#39;px&#39;}">
      <ul class="bottommenu">
        <li class="item" @click="backHome()">首页</li>
        <li class="item" @click="backShop()">返回货架</li>
        <li class="item border">放弃编辑</li>
        <li class="item" @click="uploadtest()">上架</li>
      </ul>
    </p>
    <p class="fillbottom"></p>
  </p>
</template>

viewimg($event) {
  //获取当前的input标签
  var currentObj = event.currentTarget; 
  //找到要预览的图片img标签，亦可动态生成
  var img = currentObj.parentNode.children[0]; 
  setImagePreview(currentObj, img);
  function setImagePreview(docObj, imgObjPreview) {
    if (docObj.files && docObj.files[0]) {
      imgObjPreview.style.display = 'block';
      imgObjPreview.src = window.URL.createObjectURL(docObj.files[0]);
    }
  }
}