##**使用**
###*控制器下使用*
* * * * *
$this->cache->init()->key('username')->value('root')->set();
$this->cache->init()->key('username')->prefix('msqphp_')->value('root')->expire(200)->set();
$cache = $this->cache->init()->key('username');
if ($cache->exists()) {
$cache->get()
} else {
$cache->value('cache值)->set();
}
$this->cache->init('File', ['length'=>10])->key('username')->value('root')->expire(3600)->set();
$handler = new handler_class($config);//实现handlersCacheHandlerInterface
$this->cache->init()->handler($handler)->key('test')->value('a')->set();
$this->cache->init()->key('username')->get();
$this->cache->init()->key('username')->inc();
$this->cache->init()->key('username')->offset(5)->inc();
$this->cache->init()->key('username')->dec();
$this->cache->clear();
###*非控制器使用*
* * * * *
msqphpcorecacheCache::getInstance()获得cache类对象;使用方法同上



