Magento 2 : Use aftersave and beforesave method

you can used _beforeSave and _afterSave in your ResourceModel

<?php
    namespace Spacename\Modulename\Model\ResourceModel;
    class Test extends \Magento\Framework\Model\ResourceModel\Db\AbstractDb  {

        protected function _beforeSave(\Magento\Framework\Model\AbstractModel $object)
        {
      // do your logic here

        }

       protected function _afterSave(\Magento\Framework\Model\AbstractModel $object)
        {  
          //do your logic here
        }



    }