JPA 映射：“QuerySyntaxException：FooBar 未映射……”

FooBar is not mapped即使我已经放置了所有必要的注释，我也遇到了异常：

模型类中的Entity注解：

模型/FooBar.java*

@Data
@Entity
@Table(name = "ORDERS")
public class FooBar {}

DAO 中的 Repository、PersistenceContext 和 Transactioinal。另外，我通过类名“FooBar”正确地引用了它

db/FooBarDao.java

@Repository
public class OrderDAO {
    @PersistenceContext
    private EntityManager em;

    @Transactional
    public List<FooBar> getFooBars() {
        return em.createQuery(
                "select fb from FooBar fb",
                FooBar.class
        ).getResultList();
    }
}

这是使其全部工作的配置：

配置文件/DbConfig.java

@EnableTransactionManagement
@Configuration
@ComponentScan(basePackages = {"project.db"})
public class DbConfig {

    @Autowired
    public Environment env;

    @Bean
    public DataSource dataSource() {
        System.out.println("Configuring database!!!!!!!!");
        DriverManagerDataSource ds = new DriverManagerDataSource();
        ds.setDriverClassName("org.hsqldb.jdbcDriver");
        ds.setUrl("jdbc:hsqldb:mem:myjdbc");

        new JdbcTemplate(ds)
                .update(FileUtil.readFile2("./src/main/java/project/db/sql/initialize.sql"));

        return ds;
    }


    @Bean
    public PlatformTransactionManager transactionManager(
            EntityManagerFactory entityManagerFactory) {

        return new JpaTransactionManager(entityManagerFactory);
    }

    @Bean
    public EntityManagerFactory entityManagerFactory() {
        LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
        factory.setPersistenceProviderClass(HibernatePersistenceProvider.class);
        factory.setPackagesToScan("model");
        factory.setDataSource(dataSource());
        factory.setJpaProperties(additionalProperties());
        factory.afterPropertiesSet();

        return factory.getObject();
    }

    private Properties additionalProperties() {
        Properties properties = new Properties();
        properties.setProperty("hibernate.hbm2ddl.auto", "validate");
        properties.setProperty("hibernate.dialect",
                "org.hibernate.dialect.HSQLDialect");
        properties.setProperty("hibernate.show_sql", "true");
        properties.setProperty("hibernate.format_sql", "true");

        return properties;
    }

}