文件下载

代码：

   <ul>
      <li ng-repeat="fileitem in item.attach_file_arr track by $index">
          <a class="m-r-sm" href="{{fileitem.url}}" target="_blank">{{fileitem.file_name}}</a>
          <a href="{{fileitem.url}}" download="{{fileitem.file_name}}"><i class="fa fa-download m-l"></i></a>
      </li>
    </ul>