1.cmd输入命令：mysql -u root -p

2.分别执行命令：use mysql;

select user,plugin from user where user='root';

3.分别执行命令：

alter user 'root'@'localhost' identified by 'root' password expire never;

alter user 'root'@'localhost' identified with mysql_native_password by 'root';

flush privileges;

4.正常链接数据库