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Access denied for user 'root'@'localhost' (using password: YES)

Warning: mysql_connect(): Access denied for user 'root'@'localhost' (using password: YES) in C:\xampp\htdocs\shopImooc\lib\mysql.func.php on line 7 数据库连接失败Error:1045:Access denied for user 'root'@'localhost' (using password: YES) 请问怎么解决？？