如何解析@Component,@Service,@Configurationd,@Bean,@Import等注解

1. 源码描述

BeanFactoryPostProcessor used for bootstrapping processing of @Configuration classes.

Registered by default when using context:annotation-config/ or context:component-scan/. Otherwise, may be declared manually as with any other BeanFactoryPostProcessor.

This post processor is priority-ordered as it is important that any Bean methods declared in @Configuration classes have their corresponding bean definitions registered before any other BeanFactoryPostProcessor executes.

主要是来解析@Configuration注解的类，比其他BeanFactoryPostProcessor优先执行。

2. 类继承结构图

3. 解析流程

4. 具体的注解解析

• 递归处理成员嵌套类
• @PropertySource
• @ComponentScan
• @Import
• @ImportSource
• @Bean
• 解析父类