package org.springframework.cloud.netflix.eureka;public class EurekaHealthCheckHandler implements InitializingBean {}

package com.alibaba.cloud.seata.feign;public class SeataContextBeanPostProcessor implements BeanPostProcessor {}

@Slf4j
public class DemoBean implements InitializingBean {public DemoBean() {log.info("--> instantiate ");}@PostConstructpublic void postConstruct() {log.info("--> @PostConstruct ");}@Overridepublic void afterPropertiesSet() throws Exception {log.info("--> InitializingBean.afterPropertiesSet ");}public void initMethod() {log.info("--> custom initMehotd");}
} 

@Configuration
public class DemoBeanPostProcessor implements BeanPostProcessor {@Overridepublic Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {if ("demoBean".equals(beanName)){log.info("--> BeanPostProcessor.postProcessBeforeInitialization ");}return bean;}@Overridepublic Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {if ("demoBean".equals(beanName)){log.info("--> BeanPostProcessor.postProcessAfterInitialization ");}return bean;}
} 

@Configuration
public class DemoConfig {@Bean(initMethod = "initMethod")public DemoBean demoBean() {return new DemoBean();}
} 

protected Object initializeBean(final String beanName, final Object bean, @Nullable RootBeanDefinition mbd) {// 执行BeanPostProcessor.postProcessBeforeInitializationObject wrappedBean = wrappedBean = applyBeanPostProcessorsBeforeInitialization(wrappedBean, beanName);...// 执行用户自定义初始化and JSR 250 定义的方法invokeInitMethods(beanName, wrappedBean, mbd);...// 执行执行BeanPostProcessor.postProcessAfterInitializationwrappedBean = applyBeanPostProcessorsAfterInitialization(wrappedBean, beanName);return wrappedBean;
} 

// seata 上下文转换，将其他类型 wrap 成 SeataFeignContext
public class SeataContextBeanPostProcessor implements BeanPostProcessor {@Overridepublic Object postProcessBeforeInitialization(Object bean, String beanName){if (bean instanceof FeignContext && !(bean instanceof SeataFeignContext)) {return new SeataFeignContext(getSeataFeignObjectWrapper(),(FeignContext) bean);}return bean;}
} 

net.dreamlu.mica.redisson.stream.RStreamListenerDetector 查找自定义 @RStreamListener 实现 基于 Redisson 的 pub/subpublic class RStreamListenerDetector implements BeanPostProcessor {@Overridepublic Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {Class<?> userClass = ClassUtils.getUserClass(bean);ReflectionUtils.doWithMethods(userClass, method -> {RStreamListener listener = AnnotationUtils.findAnnotation(method, RStreamListener.class);.... do something}, ReflectionUtils.USER_DECLARED_METHODS);return bean;}
} 

<dependency><groupId>javax.annotation</groupId><artifactId>javax.annotation-api</artifactId>
</dependency> 

security:oauth2:ignore-urls:- '/ws/**'@ConfigurationProperties(prefix = "security.oauth2")
public class PermitAllUrlProperties {@Getter@Setterprivate List<String> ignoreUrls = new ArrayList<>();
} 

@Bean(initMethod = "initMethod")
public DemoBean demoBean() {return new DemoBean();
}public void initMethod() {log.info("--> custom initMehotd");
}