angular 上传文件

<form id="form1234" method="post" enctype="multipart/form-data">
    <input type="file" data-ng-model="fileng"  ng-click="uploadc();"  onchange="angular.element(this).scope().fileChangeEvent()"  id="fileid" >
</form>


$scope.uploadc=function () {
        document.getElementById("file").click();
}
$scope.fileChangeEvent=function () {
		document.getElementById("form1234").action=$scope.url + "hanshow-base/goodsStore/importGoodsStore?HSUser="+$cookies.get("HS");
		document.getElementById("form1234").submit();
}


@ResponseBody
public Json txtUploadBocUploadDo(@RequestParam(value = "file", required = false) MultipartFile file,TxtUploadBoc txtUploadBoc, HttpSession session) {


}