@Bean
    public MetaDataHandler motanMetaDataHandler() {
        return new MotanMetaDataHandler();
    }
@Test
    public void testMotanMetaDataHandler() {
        applicationContextRunner.run(context -> {
                MetaDataHandler handler = context.getBean("motanMetaDataHandler", MetaDataHandler.class);
                assertNotNull(handler);
            }
        );
    }