我常用的是第二种方式
ALTER USER ‘root‘@‘localhost‘ IDENTIFIED WITH mysql_native_password BY ‘password‘; #修改加密规则
ALTER USER ‘root‘@‘localhost‘ IDENTIFIED BY ‘password‘ PASSWORD EXPIRE NEVER; #更新一下用户的密码
FLUSH PRIVILEGES; #刷新权限
原文：https://www.cnblogs.com/lvlv/p/12205915.html