windows:
a. WIN+R net stop mysql 關閉mysql服務
b. 復制my-dafault.ini，重命名為my.ini,進入里面
UBUNTU:
** sudo vim /etc/mysql/my.cnf **進入
執行以下操作：
1、在[client]字段里加入default-character-set=utf8，如下：
[client]
port = 3306
socket = /var/lib/mysql/mysql.sock
default-character-set=utf8
2、在[mysqld]字段里加入character-set-server=utf8，如下：
[mysqld]
port = 3306
socket = /var/lib/mysql/mysql.sock
character-set-server=utf8
3、在[mysql]字段里加入default-character-set=utf8，如下：
[mysql]
no-auto-rehash
default-character-set=utf8
修改完成后，service mysql restart重啟mysql服務就生效。注意：[mysqld]字段與[mysql]字段是有區別的。這點在網上沒人反饋過。
注：
show variables like 'character%' 可查看mysql編碼方式，修改完成后是這樣的：
+--------------------------+----------------------------+
| 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/ |
+--------------------------+----------------------------+