求帮忙，无法数据库加载驱动，这有关问题如何解决

求帮忙，无法数据库加载驱动，这问题怎么解决

namespace Home\Controller;
use Think\Controller;
class IndexController extends Controller {
public function index(){
$Data = M('oa_news');
$this-> data = $Data->select();
$this-> display();
}
}
?>

return array(

'DB_TYPE' => 'MySql',
'DB_HOST' => 'localhost',
'DB_NAME' => 'Wechar',
'DB_USER' => 'root',
'DB_PWD' => 'root',
'DB_PORT' => 3306,

);












:(
无法加载数据库驱动: Think\Db\Driver\
错误位置
FILE: E:\ThinkPHP\ThinkPHP\Library\Think\Db.class.php 　LINE: 42
TRACE
#0 E:\ThinkPHP\ThinkPHP\Library\Think\Db.class.php(42): E('\xE6\x97\xA0\xE6\xB3\x95\xE5\x8A\xA0\xE8\xBD\xBD\xE6\x95\xB0...')
#1 E:\ThinkPHP\ThinkPHP\Library\Think\Model.class.php(1423): Think\Db::getInstance('')
#2 E:\ThinkPHP\ThinkPHP\Library\Think\Model.class.php(97): Think\Model->db(0, '', true)
#3 E:\ThinkPHP\ThinkPHP\Common\functions.php(621): Think\Model->__construct('oa_news', '', '')
#4 C:\xampp\htdocs\app\Application\Home\Controller\IndexController.class.php(6): M('oa_news')
#5 [internal function]: Home\Controller\IndexController->index()
#6 E:\ThinkPHP\ThinkPHP\Library\Think\App.class.php(164): ReflectionMethod->invoke(Object(Home\Controller\IndexController))
#7 E:\ThinkPHP\ThinkPHP\Library\Think\App.class.php(205): Think\App::exec()
#8 E:\ThinkPHP\ThinkPHP\Library\Think\Think.class.php(120): Think\App::run()
#9 E:\ThinkPHP\ThinkPHP\ThinkPHP.php(97): Think\Think::start()
#10 C:\xampp\htdocs\app\index.php(24): require('E:\\ThinkPHP\\Thi...')
#11 {main}
------解决思路----------------------
你的 MySQL 没有启动，或没有加载 mysql 扩展
------解决思路----------------------
你可以试试127.0.0.1 有可能你loacalhost访问不了mysql。