修改Linux下MySQL编码

默认登录mysql之后show variables like '%character%', 出现

mysql> show variables like '%character%';

+--------------------------+----------------------------+

| Variable_name            | Value                      |

+--------------------------+----------------------------+

| character_set_client     | latin1                       |

| character_set_connection | latin1                       |

| character_set_database   | latin1                       |

| character_set_filesystem | binary                     |

| character_set_results    | latin1                       |

| character_set_server     | latin1                       |

| character_set_system     | utf8                       |

| character_sets_dir       | /usr/share/mysql/charsets/ |

+--------------------------+----------------------------+

1. 找到mysql的配置文件，拷贝到etc目录下，第一步很重要

使用find命令查找cnf文件。记得不要去找my.cnf因为它不一定存在，而应该找*.cnf。

[root@linuxserver classes] find / -iname *.cnf -print

/usr/share/doc/mysql-server-4.1.12/my-medium.cnf

/usr/share/doc/mysql-server-4.1.12/my-huge.cnf

/usr/share/doc/mysql-server-4.1.12/my-innodb-heavy-4G.cnf

/usr/share/doc/mysql-server-4.1.12/my-large.cnf

/usr/share/doc/mysql-server-4.1.12/my-small.cnf

/usr/share/texmf/web2c/mktex.cnf

/usr/share/texmf/web2c/texmf.cnf

/usr/share/texmf/web2c/fmtutil.cnf

/usr/share/texmf/tex/jadetex/jadefmtutil.cnf

/usr/share/ssl/openssl.cnf

找到之后，复制一个出来

cp /usr/share/doc/mysql-server-4.1.12/my-large.cnf /etc/my.cnf

2. 打开my.cnf修改编码

vi /etc/my.cnf

在[client]下增加default-character-set=utf8

在[mysqld]下增加default-character-set=utf8

同时加上init_connect='SET NAMES utf8' (设定连接mysql数据库时使用utf8编码，以让mysql数据库为utf8运行)

重新启动mysql，执行:sudo /etc/init.d/mysql stop 然后sudo /etc/init.d/mysql start

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       | /usr/share/mysql/charsets/ |

+--------------------------+----------------------------+

即使做了以上修改如果直接数据库再创建表，然后存入中文，取出来的会是问号。解决的办法是：

创建数据库的时候指明默认字符集为utf8，如：

create database test default character set utf8;