Answer:

To use JPA with Spring, you need to configure the following:

📀 Data Source:

You need to configure the data source that JPA will use to connect to the database.

This can be done using Spring's DataSource interface.

👨‍💼 Entity Manager Factory:

You need to configure the entity manager factory that will create entity managers used to interact with the database.

This can be done using Spring's LocalContainerEntityManagerFactoryBean class.

🤝Transaction Manager:

You need to configure the transaction manager that will manage transactions for your JPA entities.

This can be done using Spring's PlatformTransactionManager interface.

🗄 Repository:

You need to define a repository interface that extends Spring's CrudRepository or JpaRepository interface, depending on your needs.

Spring Boot makes it easier to use JPA with Spring by providing auto-configuration ⚙ classes that automatically configure the above components based on your application's dependencies and settings.

For example, if you have the spring-boot-starter-data-jpa dependency in your application, Spring Boot will automatically 🤖configure the data source, entity manager factory, and transaction manager for you.

Additionally, Spring Boot provides a default implementation of the repository interface that you can use out of the box 📦.

This allows you to focus on writing your business logic instead of worrying 😥 about the details of JPA configuration.

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Introduction to Spring Data JPA 👉https://www.baeldung.com/the-persistence-layer-with-spring-data-jpa