public function index()
{
if ($_FILES[$this->fileName]['size'] <= 0) {
ResponseUtil::output(array('error' => 1, 'message' => '图片不能为空，请重试！'));
}
$upload = new UploadUtil('upload/image');
$data = $upload->upload($this->fileName);
if ($data['error'] == 0) {
// 缩略图
$upload->resizeImage(array('upload/resize_350x350'), $data['data']);
$imageUrl = UploadUtil::buildUploadDocPath($data['data'], '350x350');
ResponseUtil::output(array('error' => 0, 'url' => $imageUrl));
} else {
ResponseUtil::output(array('error' => 1, 'message' => '图片上传失败！，请重试！'));
}
}