开始中找到MySql8.0 Command Line Client 打开后分别执行以下命令

// 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
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';
// 刷新权限
FLUSH PRIVILEGES;
// 最后重置下密码：
alter user 'root'@'localhost' identified by '123456';