Spring中BeanFactory接口的作用小结

 @Configuration
    static class Config{
        @Bean
        public Bean1 bean1(){
            return new Bean1();
        }
        @Bean
        public Bean2 bean2(){
            return new Bean2();
        }

    }
    static class Bean1{
        private static final Logger log = LoggerFactory.getLogger(Bean1.class);
        public Bean1(){
            log.debug("构造bean1");
        }
       /* @Autowired
        private Bean2 bean2;
        public Bean2 getBean2(){
            return bean2;
        }*/

    }
    static class Bean2{
        private static final Logger log = LoggerFactory.getLogger(Bean2.class);
        public Bean2(){
            log.debug("构造 Bean2()");
        }
    }

public class TestBeanFactory {
    public static void main(String[] args) {
        DefaultListableBeanFactory beanFactory = new DefaultListableBeanFactory();
        //bean的定义(class,scope,初始化，销毁)
        AbstractBeanDefinition beanDefinition = BeanDefinitionBuilder.genericBeanDefinition(Config.class).setScope("singleton").getBeanDefinition();
        beanFactory.registerBeanDefinition("config",beanDefinition);
      
        for(String name:beanFactory.getBeanDefinitionNames()){
            System.out.println(name);
        }
    }

 public static void main(String[] args) {
        DefaultListableBeanFactory beanFactory = new DefaultListableBeanFactory();
        //bean的定义(class,scope,初始化，销毁)
        AbstractBeanDefinition beanDefinition = BeanDefinitionBuilder.genericBeanDefinition(Config.class).setScope("singleton").getBeanDefinition();
        beanFactory.registerBeanDefinition("config",beanDefinition);
        //给BeanFactory一些常用的后处理器
        AnnotationConfigUtils.registerAnnotationConfigProcessors(beanFactory);
        //BeanFactory后处理器主要功能是补充一些bean的定义
        beanFactory.getBeansOfType(BeanFactoryPostProcessor.class).values().stream().forEach(beanFactoryPostProcessor -> {
            beanFactoryPostProcessor.postProcessBeanFactory(beanFactory);
        });
        for(String name:beanFactory.getBeanDefinitionNames()){
            System.out.println(name);
        }
    }

 AnnotationConfigUtils.registerAnnotationConfigProcessors(beanFactory);