1、修改localhost
　　更改 "mysql" 数据库里的 "user" 表里的 "host" 项，从"localhost"改成"%"
　　mysql>use mysql;
　　mysql>update user set host = '%' where user = 'root';
　　mysql>select host, user from user;
　　mysql>FLUSH PRIVILEGES;
　　2、指定授权
　　使用myuser/mypassword从任何主机连接到mysql服务器:
　　GRANT ALL PRIVILEGES ON . TO 'myuser'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
　　使用myuser/mypassword从ip为192.168.225.166的主机连接到mysql服务器:
　　GRANT ALL PRIVILEGES ON . TO 'myuser'@'192.168.225.166' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
　　3、泛授权
　　mysql -h localhost -u root
　　mysql>GRANT ALL PRIVILEGES ON . TO 'root'@'%' WITH GRANT OPTION; //赋予任何主机上以root身份访问数据的权限
　　mysql>FLUSH PRIVILEGES;

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