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
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| mysql -h 127.0.0.1 -u root -p
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2.查看字符集
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| show variables like 'character%';
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显示如下
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| +--------------------------+----------------------------+
| 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/ |
+--------------------------+----------------------------+
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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
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| [client]
port = 3306
socket = /var/lib/mysql/mysql.sock
default-character-set=utf8
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2.在[mysqld]字段里加入character-set-server=utf8
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| [mysqld]
port = 3306
socket = /var/lib/mysql/mysql.sock
character-set-server=utf8
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3.在[mysql]字段里加入default-character-set=utf8
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| [mysql]
no-auto-rehash
default-character-set=utf8
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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
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| show variables like 'character%';
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如下所示:
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| +--------------------------+----------------------------+
| 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/ |
+--------------------------+----------------------------+
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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.
该语句相当于
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| SET character_set_client = utf8;
SET character_set_results = utf8;
SET character_set_connection = utf8;
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