更改密码 执行SHOW VARIABLES LIKE 'validate_password%';查看密码策略 执行set global validate_password_length=6; 设置策略 密码长度为6 执行set global validate_password_policy=0; 设置策略为LOW 0 执行alter user user() identified by "XXXXX";更改密码 执行GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'XXXXX' WITH GRANT OPTION;开放外网访问,XXXXX为更改的密码 执行flush privileges;刷新权限 Ctrl+D退出MySql命令行