What is the purpose of @Transactional in Java?

In Java, the @Transactional annotation is used to declare a method or class as a transactional method. It can be applied at the method level or class level.

When a method or class is marked as @Transactional, it indicates that the method or class serves as the boundary of a transaction. All database operations (inserting, deleting, updating, querying) within the method will be executed within a single transaction. If the method is successful, the transaction will be committed; if the method fails, the transaction will be rolled back.

The @Transactional annotation can be applied to various scenarios, such as managing database operations like create, read, update, and delete, handling sending and receiving messages in a message queue, and managing reading and writing files. It offers a simple way to manage transactions and ensures the consistency and integrity of data.

The @Transactional annotation can also be configured with some properties to control the behavior of transactions, such as propagation behavior, isolation level, timeout, etc.

In summary, the purpose of the @Transactional annotation is to declare a method or class as a transactional method and provide transaction management, ensuring the consistency and integrity of database operations.