Whether Spring boot Data JPA uses hibernate internally for it's implementation?

Question

I am working to set up an existing project, I found the following dependency in pom.xml

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

but there is no any dependency for hibernate so how to check whether a project using hibernate or not.

And Also I found JpaConfiguration class which contains following code.

@Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource) {
        LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
        entityManagerFactoryBean.setDataSource(dataSource);

        String entities = ClassUtils.getPackageName(ArkonnApplication.class);
        String converters = ClassUtils.getPackageName(Jsr310JpaConverters.class);
        entityManagerFactoryBean.setPackagesToScan(new String[]{entities, converters});

        entityManagerFactoryBean.setJpaVendorAdapter(new HibernateJpaVendorAdapter());

        Properties jpaProperties = new Properties();
        jpaProperties.put("hibernate.dialect", dialect);
        jpaProperties.put("hibernate.hbm2ddl.auto", hbm2ddlAuto);
        jpaProperties.put("hibernate.show_sql", showSql);
        jpaProperties.put("hibernate.format_sql", formatSql);
        jpaProperties.put("hibernate.use_sql_comments", useSqlComments);
        entityManagerFactoryBean.setJpaProperties(jpaProperties);

        return entityManagerFactoryBean;
    }

if this project is using the hibernate then why there is no any dependency or configuration for it.

1) Is Spirng boot Data JPA comes with default Hibernate configuration ?.

2) If yes, how spring boot Data JPA work internally with Hibernate.(any reference link)

Answer 1

JPA is an interface and Hibernate is the implementation. By default, Spring uses Hibernate as the default JPA vendor. you can see hibernate related dependency in dependency hierarchy under the pom.xml, this will resolve all dependencies of your project.