1.查看编码命令：
mysql> show variables like '%character%';
+--------------------------+---------------------------------------------------------+
| Variable_name | Value |
+--------------------------+---------------------------------------------------------+
| character_set_client | gb2312 |
| character_set_connection | gb2312 |
| character_set_database | latin1 |
| character_set_filesystem | binary |
| character_set_results | gb2312 |
| character_set_server | latin1 |
| character_set_system | utf8 |
| character_sets_dir | /usr/local/mysql-5.7.13-osx10.11-x86_64/share/charsets/ |
+--------------------------+---------------------------------------------------------+
8 rows in set (0.01 sec)
2.设置编码，复制my.cnf文件到/etc目录下：
sudo cp /usr/local/mysql/support-files/my-medium.cnf /etc/my.cnf
sudo vi /etc/my.cnf
client]部分加入：
default-character-set=utf8
[mysqld]部分加入：
character-set-server=utf8
修改完毕之后再启动mysql
3.再次查看编码如下：
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/local/mysql-5.7.13-osx10.11-x86_64/share/charsets/ |
+--------------------------+---------------------------------------------------------+
8 rows in set (0.00 sec)