How to interact with the database in MyBatis.

In MyBatis, interacting with the database is primarily achieved through configuring Mapper files and SQL statements. The following are the basic steps:

1. Configure data source: Define the data source in the configuration file of MyBatis, specifying the database driver, connection URL, username, and password.
2. Write Mapper interface: Create an interface that defines the SQL operations methods that need to be executed.
3. Write Mapper XML files: Create a corresponding Mapper XML file for each Mapper interface, in which SQL statements and interaction logic with the database are defined.
4. Write SQL statements: Write SQL statements in the Mapper XML file, utilizing features such as dynamic SQL and parameter mapping.
5. Invoke the Mapper interface: In the code, obtain an instance of the Mapper interface through the SqlSession object in MyBatis and call the defined SQL operation methods.
6. Performing SQL operations: after calling the methods in the Mapper interface, MyBatis will interact with the database based on the configured SQL statements and return the results.

By following the above steps, you can achieve the interaction between MyBatis and the database. In actual development, more Mapper interfaces and SQL operations can be configured as needed to implement complex database interaction logic.