MySql修改默认字符编码

windows下

在命令行下，查看当前数据库编码

show variables like "%char%";

mysql> show variables like "%char%";
+--------------------------+---------------------------------------------------------+
| Variable_name | Value |
+--------------------------+---------------------------------------------------------+
| character_set_client | utf8mb4 |
| character_set_connection | utf8mb4 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8mb4 |
| character_set_server | latin1 |
| character_set_system | utf8 |
| character_sets_dir | D:Program FilesMySQLMySQL Server 5.6sharecharsets |
+--------------------------+---------------------------------------------------------+

可以看到，当前数据库客户端默认是utf8编码，服务端是latin1编码

可以通过 set character_set_server=utf8改变服务端编码

mysql> set character_set_server=utf8;
Query OK, 0 rows affected

再次使用show variables like "%char%";查看字符编码

mysql> show variables like "%char%";
+--------------------------+---------------------------------------------------------+
| Variable_name | Value |
+--------------------------+---------------------------------------------------------+
| character_set_client | utf8mb4 |
| character_set_connection | utf8mb4 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8mb4 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | D:Program FilesMySQLMySQL Server 5.6sharecharsets |
+--------------------------+---------------------------------------------------------+
8 rows in set

已经修改过来了，

但是这样的修改，在数据库重新启动之后，数据库编码依然会还原，

此时可以用这个命令

mysql> set global character_set_server=utf8;
Query OK, 0 rows affected

直接修改Mysql.ini配置文件来的最稳妥，

找到ProgramDatamysqlmy.ini，这个就是mysql的配置文件

在[client]节点内

添加如下编码信息

[client]

# pipe=

# Socket=MYSQL

port=3306
default-character-set=utf8 #utf8mb4
default-collation=utf8_general_ci #utf8mb4

在数据库连接配置的url后边加上characterEnconding=utf8

jdbc:mysql://localhost:3306/xxxx?characterEncoding=utf8&serverTimezone=Asia/Shanghai

即可完美解决。

linux下，同理

使用whereis 或者which 查找mysqld或者mysql的具体安装位置

一般配置文件都在/etc目录下。

然后在port下边添加

default-character-set=utf8 #utf8mb4
default-collation=utf8_general_ci #utf8mb4

即可。

然后

serviece mysqld restart

重启，，mysql服务