问题描述：
docker成功启动mysql容器后使用navicat连接报1251 - Client does not support authentication protocol requested byserver;consider upgrading MySQL client

处理方法：
首先进入MySQL容器内

docker exec -it mysql bash

登录MySQL

mysql -u root -p 密码

查看用户信息

select host,user,plugin,authentication_string from mysql.user;

修改用户密码

-- 修改user为root，host为%的密码
ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '密码';
-- 修改user为root，host为localhost的密码
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '密码';

再次连接测试，连接成功