多文件上传并表单提交

html代码：

<a class="btn btn-danger btn-rounded btn-condensed btn-sm"  id="adjunct" onclick="doUpload();" style="margin-left: 80%" title="点击上传附件"><span class="glyphicon glyphicon-floppy-saved"></span></a>
<a class="btn btn-danger btn-rounded btn-condensed btn-sm"  id="adjunctCancel" onclick="cancel(this);" title="点击取消保存"><span class="glyphicon glyphicon-floppy-remove"></span></a>

<from id="fjtitle" name="fmAdd" method="post">
    <div class="form-group" id="fjDiv" style="margin: 5px 5px">
        <label for="fjmc" class="col-sm-5 control-label"><span style="color: red;">* </span>&nbsp;附件名称</label>
        <div class="col-sm-3">
            <input type="text" class="form-control" id="fjmc" name="fjmc" value="{$competiton.fjmc}" placeholder="">
        </div>
    </div>
</from>
<from id="uploadForm" name="fmAdd" method="post">
    <div class="form-group" style="margin: 5px 5px">
        <div class="col-sm-3">
            <input type="file" multiple="multiple"  name="uploadId" id="uploadId"/>
        </div>
    </div>
</from>
<br>
<from id="fjDescribe" name="fmAdd" method="post">
    <div class="form-group" style="margin-top: 10px;width:100%">
        <label for="fjms" class="control-label" style="margin-left: 30px">附件描述</label>
        <textarea class="form-control" rows="3" id="fjms" name="fjms" style="margin-left: 20px;width: 60%;"></textarea>
    </div>
</from>

js代码：

function doUpload() {
      $.ajaxFileUpload({
            url: "index.php?m=Jwgl&c=ManagerCompetition&a=upload",
            secureuri: false,
                fileElementId : ['fjtitle','uploadForm','fjDescribe'],
            dataType: 'json',
                type:"POST",
                data:$("#fjtitle").serializeArray(),
            success: function (data) {
                if(data.status == '1') {
                        alert(data.message);
                    } else {
                        alert(data.message);
                    }
            },
            error: function (data) {
               alert('error');
               return;
            }      
         });
}

后台代码：

 public function upload(){
//这里可以去input标签中的文本
　　$title = I('fjtitle');//等
//        if(!isset($this->U)){
//            return array('result'=>'Timeout');
//        }
        // import('Org.Net.UploadFile');
        $upload = new \Org\Net\UploadFile();
        //设置上传文件大小
        //$upload->maxSize = 3292200;
        //设置上传文件类型
        $upload->allowExts = explode(',', 'txt,csv,png,jpg,xlsx');
        //设置附件上传目录
        $upload->savePath = './Uploads/';
        if (!$upload->upload()) {
            //捕获上传异常
            $res['status'] = '0';
            $res['message'] = '上传失败';
        } else {
            //取得成功上传的文件信息
            $uploadList = $upload->getUploadFileInfo();
            $savename = $uploadList[0]['savename'];
            $res['status'] = '1';
            $res['message'] = '上传成功...';
            $res['fileName'] = $savename;
        }
        echo json_encode($res);
    }