<Upload accept=".xls, .xlsx" :action="uploadUrl" :on-success="onSuccess" :on-error="handleError" :before-upload="beforeUpload" style="float:right">
     <Button type="primary" icon="ios-cloud-upload-outline" >导入</Button>
 </Upload>
-----------------------------------------
computed: {
   uploadUrl() {    
   return baseUrl + "/ImportExcel/";   
  }
//file为ImportExcel方法返回的结果
onSuccess(file){
    if(file.code=="1")
    {
     this.$Message.error("导入失败:" + file.msg);
     return;
    }      
   },

<el-upload
      class="import-btn"
      :action="/base_data/import_data"
      :data="uplaodData"
      name="files"
      :on-success="uploadSuccess"
      :on-error="uploadError"
      accept="xlsx,xls"
      :show-file-list="false">
      <el-button class="btn light small"><i class="icon iconfont icon-piliangdaoru"></i>批量导入</el-button>
     </el-upload>

<el-upload
      class="import-btn"
      :action="111" //这里随便写，反正用不到，但是又必须要写，无奈
      :before-upload="beforeUpload"
      :on-success="uploadSuccess"
      :on-error="uploadError"
      accept="xlsx,xls"
      :show-file-list="false">
      <el-button class="btn light small"><i class="icon iconfont icon-piliangdaoru"></i>批量导入</el-button>
     </el-upload>

beforeUpload(file){
  let fd = new FormData();
  fd.append('files',file);//传文件
  fd.append('id',this.srid);//传其他参数
  axios.post('/api/up/file',fd).then(function(res){
      alert('成功');
  })
  return false //屏蔽了action的默认上传
},

<el-upload
      class="import-btn"
      :action="url+this.uploadUrl" //手动拼地址
      :data="uplaodData"
      name="files"
      :on-success="uploadSuccess"
      :on-error="uploadError"
      accept="xlsx,xls"
      :show-file-list="false">
      <el-button class="btn light small"><i class="icon iconfont icon-piliangdaoru"></i>批量导入</el-button>
     </el-upload>