MyBatis is a popular persistence framework for Java applications that simplifies the process of interacting with databases. One important aspect of using MyBatis is configuring and managing data sources and transactions.

In MyBatis, data sources are typically configured in the application’s configuration file, usually in the form of a DataSource object which provides the necessary information for connecting to a specific database. This DataSource object can be configured with properties such as the database URL, username, password, and other connection settings.

MyBatis provides built-in support for managing transactions through the use of the SqlSession object. The SqlSession object is responsible for managing the connection to the database and executing SQL statements. By default, MyBatis uses auto-commit mode for transactions, which means that each SQL statement is executed as a separate transaction.

To enable transaction management in MyBatis, developers can use the SqlSession object’s methods to begin, commit, or rollback transactions. Alternatively, MyBatis also provides support for declarative transaction management through the use of annotations or XML configuration. This allows developers to define transaction boundaries at the method level, specifying when a transaction should begin and end.

Overall, MyBatis makes it relatively easy to configure data sources and manage transactions, providing a streamlined approach to interacting with databases in Java applications. By leveraging MyBatis’s built-in features for data source configuration and transaction management, developers can focus on writing SQL queries and mapping results to Java objects without having to worry about the underlying details of database connections and transactions.