MyBatis Configuration File: Main Elements Explained

The main elements of MyBatis configuration file include:

1. Configuration: The root element containing the complete configuration information for MyBatis.
2. Properties: Can be used as placeholders in configuration files to configure database connection information, logging implementation, and more.
3. Configuration: The overall settings in MyBatis, including configurations for caching, lazy loading, logging, and more.
4. Type aliases: Used to give Java types a different name, which simplifies mapping configurations.
5. TypeHandlers: used to convert between Java types and database types.
6. Environments: This includes the environment settings for database connections.
7. Environment variables are specific configurations for a database connection.
8. mappers: configure mapper files or mapper interfaces to define SQL statements and mapping rules.

Among them, configuration, properties, settings, and typeAliases are mandatory elements, while environments, mappers, and other elements are optional.