spring bean 动态创建、核心类ApplicationContext 、AutowireCapableBeanFactory

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最新推荐文章于 2025-06-04 09:18:44 发布

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分类专栏： springboot Spring 文章标签： AutowireCapableBeanFactory 动态

本文链接：https://blog.youkuaiyun.com/ID19870510/article/details/79205697

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本文详细探讨了Spring框架中如何动态创建Bean以及核心类ApplicationContext和AutowireCapableBeanFactory的使用。特别指出，即使Bean1为static，也需要通过非static的setBean1方法配合@Autowired注解进行注入，而非在字段上直接使用Autowired。

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public class SpringBeanUtil implements ApplicationContextAware {

    @Autowired
    private static ApplicationContext context = null;

    private Bean1 bean1;
    private Bean2 bean2;

    public void setApplicationContext(ApplicationContext context) throws BeansException {
        SpringBeanUtil.context = context;
        // bean1 = context.getBean(Bean1.class);
        // bean2 = context.getBean(Bean2.class);
        bean1 = context.getAutowireCapableBeanFactory().createBean(Bean1.class);
//      bean2 = context.getAutowireCapableBeanFactory().createBean(Bean2.class);

//      bean2 = (Bean2) context.getAutowireCapableBeanFactory().createBean(Bean2.class, AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, true);

//      context.getAutowireCapableBeanFactory().autowireBean(bean1);
//      context.getAutowireCapableBeanFactory().autowireBeanProperties(bean2, AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, true);
    }


public class Bean2 {

    @Autowired
    private Bean1 bean1;

    public Bean2() {
        System.out.println("bean2 创建");
    }

    public void testBean1IsNull() {
        System.out.println("检测bean1是否被赋值  bean1 == " + bean1);
    }
}