Warning: PDO::__construct() [pdo.--construct]: [2002] 由于目标计算机积极拒绝，无法连接。 (trying to connect via tcp://127.0.0.1:3306) in F:\www\wzz\lib\model.php on line 9

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000] [2002] 由于目标计算机积极拒绝，无法连接。 ' in F:\www\wzz\lib\model.php:9 Stack trace: #0 F:\www\wzz\lib\model.php(9): PDO->__construct('mysql:host=127....', 'wzz', 'wzz123456') #1 F:\www\wzz\common\init.php(27): Model->__construct() #2 F:\www\wzz\lib\c\home\indexAction.php(7): M('ad') #3 F:\www\wzz\common\init.php(136): indexAction->index() #4 F:\www\wzz\common\common.php(142): include('F:\www\wzz\comm...') #5 F:\www\wzz\index.php(2): include('F:\www\wzz\comm...') #6 {main} thrown in F:\www\wzz\lib\model.php on line 9