修改/etc/mysql/my.cnf
sudo gedit /etc/mysql/my.cnf
在my.cnf文件中的[client]段和 [mysqld]段加上以下两行内容：
[client]
default-character-set=utf8
[mysqld]
default-character-set=utf8
需要重启mysql服务
停用：
sudo mysqladmin shutdown -u root -p
然后输入mysql的root用户的密码
启用：
sudo mysqld_safe -user=mysql &
查看一下现在mysql的编码
sudo mysql －u root -p
mysql>show variables like 'character%';
+--------------------------+----------------------------+
| Variable_name | Value |
+--------------------------+----------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+