I always report an error when upgrading from 5.1.2 File mode to 5.2.1 JDBC mode

[Zhai6319]

Bug Report

mybatis plus 3.5.1 + shardingsphere 5.2.1 + druid 1.2.8

demo example：[demo example](https://github.com/Zhai6319/sbx-system)

Please use the maven settings file under the maven directory of the project

[Zhai6319]

I don't know if there is a problem with my configuration

[linghengqian]

• This issue is a duplicate of Markup SpringBoot users need to specify SnakeYAML version in Github Wiki #21476 and should be marked as invalid and closed.

• If you are using SpringBoot OSS < 3.0.0-M5, you need to specify the SnakeYAML version manually.

[Zhai6319]

I report this error after specifying the version

[linghengqian]

• ShardingSphere 5.2.0 slightly refactored the configuration of read-write separation on the client side. A typical example of changes to upgrade from 5.1.2 to 5.2.0 should look something like dynamic-datasource/dynamic-datasource-samples@dd7c1e9 .

• Without further ado, the link I quoted doesn't have much to do with ShardingSphere. You should refer to the official documentation.

[Zhai6319]

Thank you for your help