/*图片上传*/    public function upload(){        $file = $_FILES['mypic'];        $upload = new \Think\Upload();// 实例化上传类        $upload->maxSize = 2*1024*1024;        $upload->rootPath  = './Uploads/'; // 设置附件上传根目录        $upload->savePath  = 'Advert/yyzz/'; // 设置附件上传（子）目录        $upload->exts     = array('jpg', 'jpeg','png');        $info = $upload->uploadOne($file);        $infourl='./Uploads/'.$info['savepath'].$info['savename'];        $image = new \Think\Image();        $image->open($infourl);//将图片裁剪为400x400并保存为corp.jpg        $width = $image->width(); // 返回图片的宽度        $height = $image->height(); // 返回图片的高度        $iw = $ih = 150;        if($iw>$width){            $iw = $width;        }        if($ih>$height){            $ih = $height;        }        if($width>150 || $height>150){            $image->thumb($iw, $ih,\Think\Image::IMAGE_THUMB_CENTER)->save($infourl);        }        if($info){            $data['imgurl']='./Uploads/'.$info['savepath'].$info['savename'];            $res=M('image')->add($data);            if($res){                exit('{"name":"'.$info['savename'].'","imgurl":"'.$data['imgurl'].'","imgid":"'.$res.'"}');            }        }else{            exit;        }    }