https://wenku.baidu.com/view/d2d4f15ba8114431b80dd81f.html

vim /etc/mysql/my.cnf

 [client] 

 default-character-set = utf8 

 [mysqld] 

 character-set-server=utf8 

 collation-server=utf8_general_ci 

 skip-character-set-client-handshake 

 [mysql] 

 default-character-set = utf8