修改mysql的配置文件,使數(shù)據(jù)庫與服務器操作系統(tǒng)的字符集設置一致。
vi /etc/my.cnf 設置(如果沒有發(fā)現(xiàn)這個文件，就新建1個)
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
default-character-set=utf8 (增加的關鍵一句,使得數(shù)據(jù)庫缺省以utf8存儲)
當然，修改后，要重啟數(shù)據(jù)庫。
再次用mysql -u root -p命令進入數(shù)據(jù)庫系統(tǒng)，用SHOW VARIABLES LIKE 'character_set_%';命令查看到如下內(nèi)容：
+--------------------------+-----------------------------------------------------------------------+
| Variable_name | Value |
+--------------------------+-----------------------------------------------------------------------+
| character_set_client | latin1 |
| character_set_connection | latin1 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | latin1 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/local/mysql-5.1.20-beta-linux-i686-glibc23/share/mysql/charsets/ |
+--------------------------+-----------------------------------------------------------------------+
發(fā)現(xiàn)關鍵項目已經(jīng)用了utf8，但這樣還不夠，還要保證客戶端也是用utf8的字符集來操作的。
登錄的時候，要用以下命令：mysql --default-character-set=utf8 -u root -p
再次用SHOW VARIABLES LIKE 'character_set_%';命令查看，結果變成了：
+--------------------------+-----------------------------------------------------------------------+
| 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/local/mysql-5.1.20-beta-linux-i686-glibc23/share/mysql/charsets/ |
+--------------------------+-----------------------------------------------------------------------+
這樣才能保證客戶端所發(fā)命令都是基于utf8格式的，比如說建立數(shù)據(jù)庫和表，默認就會以utf8編碼，而無須再次指定。
需要說明一下，如果在修改編碼之前已經(jīng)建好數(shù)據(jù)庫，需要刪掉原來，重新建立數(shù)據(jù)庫。
