public function index()
    {
        $page = input(‘page‘) ? input(‘page‘) : 1;
        $limit = input(‘limit‘) ?input(‘limit‘) : 5;
        //接收关键字
        $keyword = input(‘name‘) ? input(‘name‘) :‘‘;
        $where = [];
        if (!empty($keyword)){
            $where[‘name‘] = [‘like‘,‘%‘.$keyword.‘%‘];
        }
        //计算偏移量
        $offset = ($page-1)*$limit;

        //开启redis
        $redis = new Redis();
        $flag = null;
        //判断是否有缓存
        if ($redis->has(‘goodsData‘)){
            //有的话直接走缓存
            $flag = ‘redis‘;
            $goodsData = $redis->get(‘goodsData‘);
        }else{
            //没有 查询数据库
            //获取数据
            $flag = ‘mysql‘;
            $goodsData = GoodsModel::getAllGoods($where,$offset,$limit);
            //加入缓存
            $redis->set(‘goodsData‘,$goodsData);
        }

        //获取总条数
        $goodsCount = GoodsModel::getAllCount($where,$offset,$limit);
        $arr[‘code‘] = 0;
        $arr[‘massage‘] = ‘success-‘.$flag;
        $arr[‘data‘] = $goodsData;
        $arr[‘count‘] = $goodsCount;
        return json($arr);
    }