Bean实例化之前修改BeanDefinition示例详解

@FunctionalInterface
public interface BeanFactoryPostProcessor {
    void postProcessBeanFactory(ConfigurableListableBeanFactory var1) throws BeansException;
}

    @Component
    public class MyBeanFactoryPostProcessor implements BeanFactoryPostProcessor {
    
        @Override
        public void postProcessBeanFactory(ConfigurableListableBeanFactory configurableListableBeanFactory) throws BeansException {
            DefaultListableBeanFactory defaultListableBeanFactory = (DefaultListableBeanFactory) configurableListableBeanFactory;
            BeanDefinitionBuilder beanDefinitionBuilder = BeanDefinitionBuilder.genericBeanDefinition(User.class);
            beanDefinitionBuilder.addPropertyValue("id", 123456);
            beanDefinitionBuilder.addPropertyValue("label", "技术那些事儿");
            defaultListableBeanFactory.registerBeanDefinition("user", beanDefinitionBuilder.getBeanDefinition());
        }
    }

void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) throws BeansException;

public class ConfigurationClassPostProcessor implements BeanDefinitionRegistryPostProcessor,
                PriorityOrdered, ResourceLoaderAware, BeanClassLoaderAware, EnvironmentAware 
@Override
public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) {
	int registryId = System.identityHashCode(registry);
	if (this.registriesPostProcessed.contains(registryId)) {
		throw new IllegalStateException(
				"postProcessBeanDefinitionRegistry already called on this post-processor against " + registry);
	}
	if (this.factoriesPostProcessed.contains(registryId)) {
		throw new IllegalStateException(
				"postProcessBeanFactory already called on this post-processor against " + registry);
	}
	this.registriesPostProcessed.add(registryId);
	/**
	 * @author lcy
	 * 处理配置beanDefinition
	 */
	processConfigBeanDefinitions(registry);
}