怎么把html上文件选择器选中的文件上传到服务器指定目录并把patch记录到数据库呢？

html部分：

<extend name="Common/base" />
<block name="nav"></block>

<block name="main">
<div class="pd-20">
   <form action="addPost" method="post" class="form form-horizontal" id="form-staff-add">
    <input type="hidden" id="{$modelIdField}" name="{$modelIdField}" value="{$staff.staff_id}" />
    <div class="row cl">
      <label class="form-label col-3"><span class="c-red">*</span>图片文件：</label>
      <div class="formControls col-7">
        <span class="btn-upload form-group">
            <input class="input-text upload-url radius" type="text" name="uploadfile" id="uploadfile" readonly datatype="*" nullmsg="不能为空！"><a href="javascript:void();" class="btn btn-primary radius"><i class="iconfont">&#xf0020;</i> 浏览文件</a>
            <input type="file" multiple name="file" class="input-file">
        </span>
      </div>
      <div class="col-4"> </div>
    </div>
    <div class="row cl">
      <div class="col-9 col-offset-3">
        <input class="btn btn-primary radius" type="submit" value="&nbsp;&nbsp;提交&nbsp;&nbsp;">
      </div>
    </div>
  </form>
</div>
</block>

<block name="js">
$(function(){
    $("#form-staff-add").Validform({
        tiptype:3,
    });
});
</block>