先用root登陆mysql,然后运行下面代码创建mysql用户和库

下面创建的帐号：test123  密码：123456  库名：test123

CREATE USER ‘test123‘@‘localhost‘ IDENTIFIED BY ‘123456‘;GRANT USAGE ON * . * TO ‘test123‘@‘localhost‘ IDENTIFIED BY ‘123456‘ WITH MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0 ;CREATE DATABASE IF NOT EXISTS `test123` ;GRANT ALL PRIVILEGES ON `test123` . * TO ‘test123‘@‘localhost‘;

mysql root密码忘记修改方法参考：http://www.cnblogs.com/kangleweb/p/9364711.html