navicat 连接 MySQL8 出现 Authentication plugin 'caching_sha2_password' cannot be loaded错误

mysql8之前连接加密规则是mysql_native_password,而在mysql8之后,加密规则是caching_sha2_password

解决问题方法：把mysql用户登录密码加密规则还原成mysql_native_password

1、登录mysql8

   mysql -u root -p

2、修改加密规则 

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

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

3、刷新权限

   FLUSH PRIVILEGES;   

4、再次连接