#### 文件夹上传
支持上传一个文件夹里的所有文件。
#### Upload directory
You can select and upload a whole directory.
<template>
<a-upload action="//jsonplaceholder.typicode.com/posts/" directory>
<a-button>
<a-icon type="upload" /> Upload Directory
</a-button>
</a-upload>
</template>