1、用 SET 語法來指定，不加 "GLOBAL" 的話就只對本次會話有效。

SET [GLOBAL] character_set_client = utf8; SET [GLOBAL] character_set_connection = utf8; SET [GLOBAL] character_set_database = utf8; SET [GLOBAL] character_set_results = utf8; SET [GLOBAL] character_set_server = utf8;

2、只對本次會話有效。

SET NAMES 'utf8';

3、直接修改 my.cnf，[client]和[MySQLd]下面各增加一行內容，然后重啟 MySQL，全局生效。

default-character-set = utf8