tp6中model的crd

<?php
namespace app\index\controller;

use app\BaseController;
use think\facade\Db;
use app\model\Aaa;
use think\facade\Cache;
class Index extends BaseController
{
    public function hello()
    {
    	//设置缓存
    	Cache::set("bj","您好",3600);
    	//获取缓存
    	$res=Cache::get("bj");
    	//输出缓存
    	halt($res);
    }
}

<?php
namespace app\index\controller;

use app\BaseController;
use think\facade\Db;
use app\model\Aaa;
use think\facade\Cache;
class Index extends BaseController
{
    public function hello()
    {
    	//设置缓存
    	Cache::set("bj","您好",3600);
    	//删除缓存
    	Cache::delete('bj');
    	//获取缓存
    	$res=Cache::get("bj");
    	//输出缓存
    	halt($res);
    }
}