没有xml的Spring数据jpa持久性配置不起作用

Question

我尝试使spring数据jpa的java配置无法正常工作。对于Main类，它要求persistence.xml但我根本不使用任何xml。在某种程度上，它没有读我的PersistenceConfig类。

为任何帮助感到高兴

这是我的代码：

    @EnableWebMvc
    @Configuration
    @ComponentScan({ "com.test.*" })
    @EnableTransactionManagement
    @PropertySources({ @PropertySource("classpath:/database/database.properties") })
    @EnableSpringDataWebSupport
    @EnableJpaRepositories(basePackages = {"com.test.repository"})
    public class PersistenceConfig
    {
    @Autowired
    Environment env;

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory()
    {
    LocalContainerEntityManagerFactoryBean em = new   LocalContainerEntityManagerFactoryBean();
    em.setDataSource(dataSource());
    em.setPackagesToScan(User.class.getPackage().getName());
    em.setPackagesToScan(new String[] { "com.test.domain" });
    em.setPersistenceUnitName("rapid");

    JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
    em.setJpaVendorAdapter(vendorAdapter);
    em.setJpaProperties(additionalProperties());

    return em;
    }

   Properties additionalProperties()
   {
    Properties properties = new Properties();

    properties.setProperty("hibernate.hbm2ddl.auto", "auto");
    properties.setProperty("hibernate.dialect",   "org.hibernate.dialect.MySQL5Dialect");
    properties.setProperty("hibernate.show_sql", "true");
    properties.setProperty("entitymanager.packagesToScan", "test");


    return properties;
    }

    @Bean(name = "dataSource")
    public DataSource dataSource()
    {
    DriverManagerDataSource driverManagerDataSource = new   DriverManagerDataSource();


     driverManagerDataSource.setDriverClassName("com.mysql.jdbc.Driver");
     driverManagerDataSource.setUrl("jdbc:mysql://localhost:3306/test");
     driverManagerDataSource.setUsername("root");
     driverManagerDataSource.setPassword("");

    return driverManagerDataSource;
    }

    @Bean
    public PlatformTransactionManager transactionManager(EntityManagerFactory emf)
    {
    JpaTransactionManager transactionManager = new JpaTransactionManager();
     transactionManager.setEntityManagerFactory(this.entityManagerFactory().getObject());

    return transactionManager;
    }

    @Bean
    public PersistenceExceptionTranslationPostProcessor exceptionTranslation()
    {
    return new PersistenceExceptionTranslationPostProcessor();
    }


    @Bean
    @Autowired
    public JpaTransactionManager jpaTransactionManager(EntityManagerFactory entityManagerFactory)
        {
    JpaTransactionManager txManager = new JpaTransactionManager();
    JpaDialect jpaDialect = new HibernateJpaDialect();
    txManager.setEntityManagerFactory(entityManagerFactory);
    txManager.setJpaDialect(jpaDialect);
    return txManager;
    }

    @Bean
    public HibernateExceptionTranslator hibernateExceptionTranslator() {
    return new HibernateExceptionTranslator();
    }

    @Bean
    public PersistenceExceptionTranslationPostProcessor persistenceExceptionTranslationPostProcessor() {
    return new PersistenceExceptionTranslationPostProcessor();
    }

    }

Main类是：

   @Transactional
        public class Main
        {


            public static void main(String[] args)
                {
                    EntityManagerFactory factory = Persistence.createEntityManagerFactory("test");
                    EntityManager manager = factory.createEntityManager();

                    Main test = new Main(manager);

                    EntityTransaction tx = manager.getTransaction();
                    tx.begin();
                    try
                    {
                        test.listUsers();
                    }
                    catch (Exception e)
                    {
                        e.printStackTrace();
                    }
                    tx.commit();
                    test.listUsers();
                    System.out.println(".. done");
                }
        }

这是错误：

Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named rapid:  No META-INF/persistence.xml was found in classpath.
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:154)
at     javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
 at com.test.main.Main.main(Main.java:35)

第35行是：

 EntityManagerFactory factory = Persistence.createEntityManagerFactory("test");

不知道原因，并乐意获得一些建议或解决方案。