内容简介：Linux下MySQL_5.5的修改字符集编码为UTF8
背景
mysql安装后, 插入的数据位乱码, 经检查为默认字符集是 latin1
, 而程序使用 UTF-8
.
检查字符集
1.使用ssh终端连接mysql
mysql -h 127.0.0.1 -u root -p
2.查看字符集
show variables like 'character%';
显示如下
+--------------------------+----------------------------+ | Variable_name | Value | +--------------------------+----------------------------+ | character_set_client | utf8 | | character_set_connection | utf8 | | character_set_database | latin1 | | character_set_filesystem | binary | | character_set_results | utf8 | | character_set_server | latin1 | | character_set_system | utf8 | | character_sets_dir | /usr/share/mysql/charsets/ | +--------------------------+----------------------------+
character_set_database和character_set_server的默认字符集还是latin1.
解决方案
修改 mysql 的 my.cnf
文件中的字符集键值, my.cnf
一般位于 /etc
目录下, 没找到的话可以使用 find / -name my.cnf
查找.
1.在[client]字段里加入default-character-set=utf8
[client] port = 3306 socket = /var/lib/mysql/mysql.sock default-character-set=utf8
2.在[mysqld]字段里加入character-set-server=utf8
[mysqld] port = 3306 socket = /var/lib/mysql/mysql.sock character-set-server=utf8
3.在[mysql]字段里加入default-character-set=utf8
[mysql] no-auto-rehash default-character-set=utf8
修改完成后，service mysql restart重启mysql服务就生效.
注意: [mysqld]字段与[mysql]字段是有区别的.
4.再次查看字符集
show variables like 'character%';
如下所示:
+--------------------------+----------------------------+ | 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/ | +--------------------------+----------------------------+
5.如果上面的都修改了还乱码,那剩下问题就一定在connection连接层上.
SET NAMES 'utf8';
该语句相当于
SET character_set_client = utf8; SET character_set_results = utf8; SET character_set_connection = utf8;
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