JpaConfigurator.java com Oracle

Senhores estou usando o banco de dados oracle ao invés do mysql, já fiz toda configuração no JpaConfigurator.java

     DriverManagerDataSource dataSource = new          
    DriverManagerDataSource();
        dataSource.setDriverClassName("oracle.jdbc.OracleDriver");
        dataSource.setUrl("jdbc:oracle:thin:@localhost:1521/xe");
        dataSource.setUsername("SYSTEM");
        dataSource.setPassword("123");

        return dataSource;


        LocalContainerEntityManagerFactoryBean entityManagerFactory = new LocalContainerEntityManagerFactoryBean();

        entityManagerFactory.setPackagesToScan("br.com.caelum");
        entityManagerFactory.setDataSource(dataSource);

        entityManagerFactory
                .setJpaVendorAdapter(new HibernateJpaVendorAdapter());

        Properties props = new Properties();

        props.setProperty("hibernate.dialect", "org.hibernate.dialect.OracleDialect");
        props.setProperty("hibernate.show_sql", "true");
        props.setProperty("hibernate.hbm2ddl.auto", "create-drop");

        entityManagerFactory.setJpaProperties(props);
        return entityManagerFactory;

Troquei para sequence na criação das tabelas, exemplo abaixo

   @Id
    @SequenceGenerator(name = "seq_id_produto", sequenceName = "seq_id_produto", allocationSize = 1)
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "seq_id_produto")
    private Integer id;

Mas estou tendo o seguinte error ao iniciar o tomcat (erro resumido)

set 18, 2019 9:04:23 PM org.apache.catalina.core.StandardContext listenerStart
GRAVE: Exceção ao enviar evento de contexto iniciado para instância listener da classe [org.springframework.web.context.ContextLoaderListener]
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'criadorDeProdutos': Invocation of init method failed; nested exception is org.springframework.dao.InvalidDataAccessResourceUsageException: could not execute statement; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not execute statement
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:136)

Caused by: org.springframework.dao.InvalidDataAccessResourceUsageException: could not execute statement; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not execute statement

Caused by: org.hibernate.exception.SQLGrammarException: could not execute statement

Caused by: java.sql.SQLSyntaxErrorException: ORA-00942: a tabela ou view não existe

Caused by: Error : 942, Position : 12, Sql = insert into Produto (descricao, linkDaFoto, loja_id, nome, preco, id) values (:1 , :2 , :3 , :4 , :5 , :6 ), OriginalSql = insert into Produto (descricao, linkDaFoto, loja_id, nome, preco, id) values (?, ?, ?, ?, ?, ?), Error Msg = ORA-00942: a tabela ou view não existe

    at oracle.jdbc.driver.T4CTTIoer11.processError(T4CTTIoer11.java:498)
    ... 84 more

Poderiam me ajudar, com isso?