<persistence>
    <persistence-unit name="sample" transaction-type="RESOURCE_LOCAL">
 
        <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
        <mapping-file>META-INF/orm.xml</mapping-file>
    </persistence-unit>
</persistence>

@Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
        LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
        em.setPersistenceXmlLocation("persistence.xml");
        em.setPersistenceUnitName("sample");
        em.setPackagesToScan(new String[]{"org.entities"});
        return em;
    }