mysql 修改字符集

转自：http://www.cnblogs.com/dadadechengzi/p/6034212.html

查看mysql数据编码

登录MySQL服务，查看mysql数据库默认的编码

mysql> show variables like 'character%';
+--------------------------+-------------------------------------------------+
| Variable_name            | Value                                           |
+--------------------------+-------------------------------------------------+
| character_set_client     | gbk                                             |
| character_set_connection | gbk                                             |
| character_set_database   | latin1                                          |
| character_set_filesystem | binary                                          |
| character_set_results    | gbk                                             |
| character_set_server     | latin1                                          |
| character_set_system     | utf8                                            |
| character_sets_dir       | E:Developmysql-5.7.15-winx64sharecharsets |
+--------------------------+-------------------------------------------------+
8 rows in set, 1 warning (0.00 sec)

mysql>

可以看出database和server都采用了latin1编码，不支持中文，我们需要把它修改为utf-8。

除了这两个，其它的如下

| 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       | E:0Developmysql-5.7.15-winx64sharecharsets 

设置mysql数据库编码

在mysql安装目录下，将 my-default.ini 复制一分保存为 my.ini 
做如下修改 

主要看红色框里的内容

[mysqld]
character-set-server=utf8 
collation-server=utf8_general_ci 

[mysql]
default-character-set = utf8

[mysql.server]
default-character-set = utf8


[mysqld_safe]
default-character-set = utf8


[client]
default-character-set = utf8

然后删除你当前的mysql服务，再重新注册mysql服务 
注：一定要以管理员的权限运行dos命令，且cd到mysql安装目录下的bin目录，再注册mysql服务

C:Windowssystem32>sc delete mysql
[SC] DeleteService 成功

C:Windowssystem32>e: cd
E:>cd E:Developmysql-5.7.15-winx64in

E:Developmysql-5.7.15-winx64in>mysqld --install mysql --defaults-file="E:Developmysql-5.7.15-winx64my.ini"
The service already exists!
The current server installed: E:Developmysql-5.7.15-winx64inmysqld MySQL

E:Developmysql-5.7.15-winx64in>net stop mysql
MySQL 服务正在停止..服务名无效。
请键入 NET HELPMSG 2185 以获得更多的帮助。

E:Developmysql-5.7.15-winx64in>mysqld --install mysql --defaults-file="E:Developmysql-5.7.15-winx64my.ini"
Service successfully installed.
E:Developmysql-5.7.15-winx64in>

结果

启动服务，查看编码

C:WindowsSystem32>net start mysql
mysql 服务正在启动 .
mysql 服务已经启动成功。


C:WindowsSystem32>mysql -u root
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 2
Server version: 5.7.15 MySQL Community Server (GPL)

Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

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       | E:Developmysql-5.7.15-winx64sharecharsets |
+--------------------------+-------------------------------------------------+
8 rows in set, 1 warning (0.00 sec)

mysql>