mysql8.0安装完成后测试连接报错Authentication plugin 'caching_sha2_password' cannot be loaded

解决办法：

进入mysql server安装目录

cd "C:\Program Files\MySQL\MySQL Server 8.0\bin"

C:\Program Files\MySQL\MySQL Server 8.0\bin> mysql -u root -p

Enter password: *********

mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'newrootpassword';

Query OK, 0 rows affected (0.10 sec)

mysql> exit