public function upload($type){
$upload = new \Think\Upload();// 实例化上传类
$upload->maxSize = 3145728 ;// 设置附件上传大小
$upload->exts = array('jpg', 'gif', 'png', 'jpeg', 'amr', 'mp3');// 设置附件上传类型
$upload->rootPath = './Uploads/'; // 设置附件上传根目录
$upload->savePath = './Prize/';
$upload->autoSub =false;

// 上传单个文件

$info = $upload->uploadOne($_FILES[$type]);

if(!$info) {
// 上传错误提示错误信息
$this->error($upload->getError());
}else{
// 上传成功 获取上传文件信息
return $info['savepath'].$info['savename'];
}

}