系统不支持:mysql

FILE: D:\WWW\longyuan\ThinkPHP\Library\Think\Db\Driver\Mysql.class.php 　LINE: 27

#0 D:\WWW\longyuan\ThinkPHP\Library\Think\Db\Driver\Mysql.class.php(27): E('\xE7\xB3\xBB\xE7\xBB\x9F\xE4\xB8\x8D\xE6\x94\xAF\xE6\x8C\x81...')
#1 D:\WWW\longyuan\ThinkPHP\Library\Think\Db.class.php(90): Think\Db\Driver\Mysql->__construct(Array)
#2 D:\WWW\longyuan\ThinkPHP\Library\Think\Db.class.php(65): Think\Db->factory('')
#3 D:\WWW\longyuan\ThinkPHP\Library\Think\Model.class.php(1287): Think\Db::getInstance('')
#4 D:\WWW\longyuan\ThinkPHP\Library\Think\Model.class.php(95): Think\Model->db(0, '', true)
#5 D:\WWW\longyuan\ThinkPHP\Common\functions.php(554): Think\Model->__construct('setting', '', '')
#6 D:\WWW\longyuan\Application\Home\Controller\PictureController.class.php(9): M('setting')
#7 D:\WWW\longyuan\ThinkPHP\Library\Think\Controller.class.php(41): Home\Controller\PictureController->_initialize()
#8 D:\WWW\longyuan\ThinkPHP\Common\functions.php(613): Think\Controller->__construct()
#9 D:\WWW\longyuan\ThinkPHP\Library\Think\App.class.php(80): controller('Picture', '')
#10 D:\WWW\longyuan\ThinkPHP\Library\Think\App.class.php(193): Think\App::exec()
#11 D:\WWW\longyuan\ThinkPHP\Library\Think\Think.class.php(120): Think\App::run()
#12 D:\WWW\longyuan\ThinkPHP\ThinkPHP.php(96): Think\Think::start()
#13 D:\WWW\longyuan\index.php(31): require('D:\\WWW\\longyuan...')
#14 {main}