mysql8 ：authentication plugin 'caching_sha2_password'报错解决

 解决办法亲测有效，办法引自：https://blog.csdn.net/u010026255/article/details/80062153

// 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';