mysql utf8mb4支持

1.改 Mysql 配置文件 my.cnf(默认位置/etc/my.cnf)

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[client] 
default-character-set = utf8mb4 

[mysql] 
default-character-set = utf8mb4 

[mysqld] 
character-set-client-handshake = FALSE 
character-set-server = utf8mb4 
collation-server = utf8mb4_unicode_ci 
init_connect='SET NAMES utf8mb4' 

2.改已有的 database、table 和 column 字符集

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msql> ALTER DATABASE database_name CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci; 
msql> ALTER TABLE table_name CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; 
msql> ALTER TABLE table_name modify column_name column_name VARCHAR(191) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; 

其中的 database_name、table_name、column_name 要替换成你对应的数据库名、表名、列名。VARCHAR 的长度值也是。

3.重启 Mysql 并检查更改后的字符集设置

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service mysql restart 
查看字符集设置: 
msql> SHOW VARIABLES WHERE Variable_name LIKE 'character_set_%' OR Variable_name LIKE 'collation%'; 
+--------------------------+--------------------+ 
| Variable_name | Value | 
+--------------------------+--------------------+ 
| character_set_client | utf8mb4 | 
| character_set_connection | utf8mb4 | 
| character_set_database | utf8mb4 | 
| character_set_filesystem | binary | 
| character_set_results | utf8mb4 | 
| character_set_server | utf8mb4 | 
| character_set_system | utf8 | 
| collation_connection | utf8mb4_unicode_ci | 
| collation_database | utf8mb4_unicode_ci | 
| collation_server | utf8mb4_unicode_ci | 
+--------------------------+--------------------+ 
rows in set (0.00 sec)