Cannot resolve symbol 'baomidou'

The "Cannot resolve symbol 'baomidou'" error usually occurs when the IDE or compiler cannot find the required library or dependency.

In this case, it seems like you are missing the `baomidou` library in your project. `baomidou` is a popular Java library for database operations in applications using MyBatis or MyBatis-Plus.

To resolve this error, you need to add the `baomidou` library as a dependency in your project.

If you are using Maven, you can add the following dependency to your project's `pom.xml` file:

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus</artifactId>
    <version>latest-version</version>
</dependency>

Replace `latest-version` with the latest version number of the `mybatis-plus` library.

If you are using Gradle, you can add the following line to your project's `build.gradle` file:

implementation 'com.baomidou:mybatis-plus:latest-version'

Again, replace `latest-version` with the latest version number of the `mybatis-plus` library.

Make sure to sync or refresh your project after adding the dependency so that the IDE or compiler can resolve it correctly.

If you have already added the dependency and are still facing this issue, check if there are any typos in the dependency declaration or if there may be a connectivity issue with your repository manager.

I hope this helps! Let me know if you have any further questions.