What is the method for switching data sources in mybatis?

There are several ways to switch data sources in MyBatis.

1. Using multiple SqlSessionFactory: configure the information of multiple data sources in the configuration file, create separate SqlSessionFactory objects, and select which one to use in the code as needed.
2. Utilize multiple MapperScannerConfigurers: configure multiple MapperScannerConfigurers, with each specifying a different basePackage attribute to scan different Mapper interfaces, and then using separate data sources for each.
3. Use RoutingDataSource: Create a custom data source that extends AbstractRoutingDataSource, override the determineCurrentLookupKey method, and select the data source based on different conditions.
4. Utilizing annotations and AOP: marking the data source used in a method or class with annotations, then intercepting the corresponding method or class using AOP, and dynamically switching data sources before executing the method.

It is necessary to choose the appropriate method for switching data sources based on specific needs and project architecture.