解决Navicat for MySQL 连接 Mysql 8.0.11 出现1251- Client does not support authentication protocol 错误

解决方法：把mysql用户登录密码加密规则还原成mysql_native_password. 

1.打开命令行小黑屏，进入MySQL的bin目录，然后输入mysql -u root -p，输入密码

2.然后输入

1、ALTER USER 'root'@'localhost' IDENTIFIED BY 'password' PASSWORD EXPIRE NEVER; #修改加密规则

2、ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '密码'; #更新一下用户的密码 

3、FLUSH PRIVILEGES; #刷新权限

4、可以成功链接Navicat for MySQL