1.MariaDB设置方法
vim /etc/my.cnf
#修改内容如下所示：
[client]
default-character-set = utf8mb4
[mysqld]
character_set_server=utf8mb4
collation-server=utf8mb4_unicode_ci
init_connect=’SET NAMES utf8mb4′
skip-character-set-client-handshake=true
[mysql]
default-character-set = utf8mb4
# 验证方法,登陆mysql
SHOW VARIABLES WHERE Variable_name LIKE ‘character\_set\_%’ OR Variable_name LIKE ‘collation%’;
2.MySql设置方法
vim /etc/my.cnf
#修改内容如下所示：
[client]
default-character-set = utf8mb4
[mysqld]
character-set-client-handshake = FALSE
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci
init_connect=’SET NAMES utf8mb4′
[mysql]
default-character-set = utf8mb4
# 验证方法,登陆mysql
SHOW VARIABLES WHERE Variable_name LIKE ‘character\_set\_%’ OR Variable_name LIKE ‘collation%’;
3.数据库连接的配置
数据库连接参数中:
characterEncoding=utf8会被自动识别为utf8mb4，也可以不加这个参数，会自动检测。
而autoReconnect=true是必须加上的。
4.将数据库和已经建好的表也转换成utf8mb4
更改数据库编码：
DATABASE caitu99 CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
更改表编码：
ALTER TABLE user_data_1_testCONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
如有必要，还可以更改列的编码
5.修改表字段编码
ALTER TABLE user_data_1_test change name name char(100) character set utf8mb4 collate utf8mb4_unicode_ci;
ALTER TABLE user_data_1_test change name name char(100) character set utf8mb4 collate utf8mb4_unicode_ci NOT NULL COMMENT ‘名称’;