mysql5.7使用urf-8字符编码

my.cnf

[mysqld]
character-set-server = utf8 
collation-server = utf8_general_ci 

[mysql]
default-character-set = utf8

[mysql.server]
default-character-set = utf8

[mysqld_safe]
default-character-set = utf8

[client]
default-character-set = utf8