修改 /etc/mysql/my.cnf
增加内容
[client] default-character-set = utf8mb4 [mysql] default-character-set = utf8mb4 [mysqld] character-set-client-handshake = FALSE character-set-server = utf8mb4 collation-server = utf8mb4_unicode_ci
原文：https://www.cnblogs.com/jinanxiaolaohu/p/9524419.html