設定編碼

1. 查詢 MySQL 預設使用編碼。
   

   mysql> show variables like 'char%';
   +--------------------------+----------------------------+
   | Variable_name            | Value                      |
   +--------------------------+----------------------------+
   | character_set_client     | latin1                     |
   | character_set_connection | latin1                     |
   | character_set_database   | utf8                       |
   | character_set_filesystem | binary                     |
   | character_set_results    | latin1                     |
   | character_set_server     | utf8                       |
   | character_set_system     | utf8                       |
   | character_sets_dir       | /usr/share/mysql/charsets/ |
   +--------------------------+----------------------------+
   8 rows in set (0.01 sec)
   

2. MySQL server, client, mysql 皆預設使用 UTF8 編碼。
   

   [root@kvm5 ~]# vim /etc/my.cnf
   [mysqld]
   collation-server=utf8_general_ci
   character-set-server=utf8
   
   [client]
   default-character-set=utf8
   
   [mysql]
   default-character-set=utf8
   

3. 重新啟動 mysqld 服務

   [root@kvm5 ~]# /etc/init.d/mysqld restart
   

4. 再次查詢 MySQL 預設使用編碼，皆已改為 utf8。
   

   mysql> show variables like 'char%';
   +--------------------------+----------------------------+
   | 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/ |
   +--------------------------+----------------------------+
   8 rows in set (0.00 sec)