第一种方式：
1.首先停止MySQL服务：service mysqld stop
2.加参数启动mysql：/usr/bin/mysqld_safe --skip-grant-tables &
然后就可以无任何限制的访问mysql了
3.root用户登陆系统：mysql -u root -p mysql
4.切换数据库：use mysql
5.显示所有的表：show tables;
这里就可以访问表了
6.查看user表中root用户的localhost权限：select * from user where user=‘root‘ and host=‘localhost‘
7.在显示的列表中显示：root用户的localhost的权限都是‘N‘,表示root用户本地登陆不具有权限
8.修改root用户的localhost权限：
update user set
`Select_priv` = ‘Y‘,
`Insert_priv` = ‘Y‘,
`Update_priv` = ‘Y‘,
`Delete_priv` = ‘Y‘,
`Create_priv` = ‘Y‘,
`Drop_priv` = ‘Y‘,
`Reload_priv` = ‘Y‘,
`Shutdown_priv` = ‘Y‘,
`Process_priv` = ‘Y‘,
`File_priv` = ‘Y‘,
`Grant_priv` = ‘Y‘,
`References_priv` = ‘Y‘,
`Index_priv` = ‘Y‘,
`Alter_priv` = ‘Y‘,
`Show_db_priv` = ‘Y‘,
`Super_priv` = ‘Y‘,
`Create_tmp_table_priv` = ‘Y‘,
`Lock_tables_priv` = ‘Y‘,
`Execute_priv` = ‘Y‘,
`Repl_slave_priv` = ‘Y‘,
`Repl_client_priv` = ‘Y‘,
`Create_view_priv` = ‘Y‘,
`Show_view_priv` = ‘Y‘,
`Create_routine_priv` = ‘Y‘,
`Alter_routine_priv` = ‘Y‘,
`Create_user_priv` = ‘Y‘,
`Event_priv` = ‘Y‘,
`Trigger_priv` = ‘Y‘,
`Create_tablespace_priv` = ‘Y‘
where user=‘root‘ and host=‘localhost
9.更新一下：flush privileges;
10.然后重新启动下mysql，可以解决问题了
第一种不行 采用第二种：
删除data中Mysql文件：
删除 mysql之后执行： ./scripts/mysql_install_db --user=mysql --datadir=/usr/local/mysql/data/mysql
就应该好了