前言 :
Spring 的扩展点是Spring易扩展的一个重要体现，熟悉这些扩展点的定义方式，以及其调用时机，可以在我们开发过程中游刃有余，进行各种骚操作。我个人觉得熟悉他们并知道其原理，是非常有必要的，今天我们就一个个来看下。

本文总结出10个扩展点，如有遗漏，欢迎补充~

本文示例代码均已经上传到github 地址: github.com/598572/xzll…

扩展点1

`实现 ApplicationContextInitializer的initialize方法`

时机 : spring容器还没被刷新之前准备阶段 this.prepareContext(context, environment, listeners, applicationArguments, printedBanner); 此时所有的配置文件都已经加载

/**
 * ApplicationContextInitializer扩展点演示 时机: spring容器还没被刷新之前
 *
 * <p>
 * 因为这时候spring容器还没被刷新，所以想要自己的扩展的生效，有以下三种方式：
 * <p>
 * 1.在启动类中用springApplication.addInitializers(new ApplicationContextInitializerPoint())语句加入
 * 2.配置文件配置context.initializer.classes=com.xzll.test.ApplicationContextInitializerPoint
 * 3.Spring SPI扩展，在spring.factories中加入org.springframework.context.ApplicationContextInitializer=com.xzll.test.ApplicationContextInitializerPoint
 * <p>
 * //TODO 目前我试了三种方式 只有第二种方式可以输出该类的打印语句 ，1和2都没有输出打印语句 目前不知原因为何。留作以后研究吧
 *
 * 这是整个spring容器在刷新之前初始化ConfigurableApplicationContext的回调接口，简单来说，就是在容器刷新之前调用此类的initialize方法。
 * 这个点允许被用户自己扩展。用户可以在整个spring容器还没被初始化之前做一些事情。
 * 可以想到的场景可能为，在最开始激活一些配置，或者利用这时候class还没被类加载器加载的时机，进行动态字节码注入等操作。
 */
public class ApplicationContextInitializerPoint implements ApplicationContextInitializer<ConfigurableApplicationContext> {

   @Override
   public void initialize(ConfigurableApplicationContext applicationContext) {

      // System.out.println("applicationContext: "+ JSON.toJSONString(applicationContext));
      // 注意这里引入不了FastJson 会报错 AnnotationConfigApplicationContext has not been refreshed yet  ; AnnotationConfigApplicationContext 尚未刷新
      // 详见: https://stackoverflow.com/questions/28404817/annotationconfigapplicationcontext-has-not-been-refreshed-yet-whats-wrong
      System.out.println("------------ApplicationContextInitializerPoint # initialize 开始-------------");
      System.out.println("[ApplicationContextInitializer扩展点演示] # initialize:  " + applicationContext.toString());
      System.out.println("BeanDefinitionCount count: " + applicationContext.getBeanDefinitionCount());
      ConfigurableListableBeanFactory beanFactory = applicationContext.getBeanFactory();
      Iterator<String> beanNamesIterator = beanFactory.getBeanNamesIterator();
      beanNamesIterator.forEachRemaining(System.out::println);
      System.out.println("时机: "+ "run 方法中的 this.prepareContext(); 的时候");
      System.out.println("-------------ApplicationContextInitializerPoint # initialize 结束------------");
      System.out.println();

   }

   /*

   private void prepareContext(ConfigurableApplicationContext context, ConfigurableEnvironment environment, SpringApplicationRunListeners listeners, ApplicationArguments applicationArguments, Banner printedBanner) {
        context.setEnvironment(environment);
        this.postProcessApplicationContext(context);
        this.applyInitializers(context);
        listeners.contextPrepared(context);
        if (this.logStartupInfo) {
            this.logStartupInfo(context.getParent() == null);
            this.logStartupProfileInfo(context);
        }

        ConfigurableListableBeanFactory beanFactory = context.getBeanFactory();
        beanFactory.registerSingleton("springApplicationArguments", applicationArguments);
        if (printedBanner != null) {
            beanFactory.registerSingleton("springBootBanner", printedBanner);
        }

        if (beanFactory instanceof DefaultListableBeanFactory) {
            ((DefaultListableBeanFactory)beanFactory).setAllowBeanDefinitionOverriding(this.allowBeanDefinitionOverriding);
        }

        Set<Object> sources = this.getAllSources();
        Assert.notEmpty(sources, "Sources must not be empty");
        this.load(context, sources.toArray(new Object[0]));
        listeners.contextLoaded(context);
    }


     protected void applyInitializers(ConfigurableApplicationContext context) {
        Iterator var2 = this.getInitializers().iterator();

        while(var2.hasNext()) {
            ApplicationContextInitializer initializer = (ApplicationContextInitializer)var2.next();
            Class<?> requiredType = GenericTypeResolver.resolveTypeArgument(initializer.getClass(), ApplicationContextInitializer.class);
            Assert.isInstanceOf(requiredType, context, "Unable to call initializer.");
            initializer.initialize(context);// todo 此处回调 initialize 方法
        }

    }

    */
}

扩展点2

`实现 BeanDefinitionRegistryPostProcessor或BeanFactoryPostProcessor 的 postProcessBeanDefinitionRegistry 和 postProcessBeanFactory方法`

时机: refresh()的 this.invokeBeanFactoryPostProcessors(beanFactory);此时此bean的定义信息都已经加载完毕但是还没到实例化以及初始化阶段

@Component
public class BeanDefinitionRegistryPostProcessorPoint implements BeanDefinitionRegistryPostProcessor {

   @Override
   public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) throws BeansException {
      System.out.println("-----------------------[BeanDefinitionRegistryPostProcessor扩展点演示] # postProcessBeanDefinitionRegistry 开始--------------------------------------");
      System.out.println("[BeanDefinitionRegistryPostProcessor扩展点演示] # postProcessBeanDefinitionRegistry");
      System.out.println("时机: refresh()的 this.invokeBeanFactoryPostProcessors(beanFactory); 方法中执行; " +
            "此时 bean的定义信息 都已经加载完毕 但是还没到实例化以及初始化阶段");
      System.out.println("-----------------------[BeanDefinitionRegistryPostProcessor扩展点演示] # postProcessBeanDefinitionRegistry 结束--------------------------------------");
      System.out.println();
   }

   @Override
   public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
      System.out.println("-----------------------[BeanDefinitionRegistryPostProcessor扩展点演示] # postProcessBeanFactory 开始--------------------------------------");
      System.out.println("[BeanDefinitionRegistryPostProcessor扩展点演示] # postProcessBeanFactory");
      System.out.println("时机: refresh()的 this.invokeBeanFactoryPostProcessors(beanFactory); 方法中执行; " +
            "此时 bean的定义信息 都已经加载完毕 但是还没到实例化以及初始化阶段");
      System.out.println("-----------------------[BeanDefinitionRegistryPostProcessor扩展点演示] # postProcessBeanFactory 结束--------------------------------------");
      System.out.println();
   }
}

@Component
public class BeanFactoryPostProcessorPoint implements BeanFactoryPostProcessor {
   @Override
   public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
      System.out.println("-----------------------[BeanFactoryPostProcessor扩展点演示] # postProcessBeanFactory 开始--------------------------------------");
      System.out.println("[BeanFactoryPostProcessor扩展点演示] # postProcessBeanFactory");
      System.out.println("时机: refresh()的 this.invokeBeanFactoryPostProcessors(beanFactory); 方法中执行; " +
            "此时 bean的定义信息 都已经加载完毕 但是还没到实例化以及初始化阶段");
      System.out.println("-----------------------[BeanFactoryPostProcessor扩展点演示] # postProcessBeanFactory 结束--------------------------------------");
      System.out.println();
   }
}

扩展点3

`实现 BeanPostProcessor 的 postProcessBeforeInitialization 或postProcessAfterInitialization方法`

时机: bean在初始化之前(postProcessBeforeInitialization) 和初始化之后(postProcessAfterInitialization),注意初始化前说明其肯定已经实例化了

@Configuration
public class BeanPostProcessPoint implements BeanPostProcessor {


   public BeanPostProcessPoint() {
      System.out.println();
      System.out.println("################## BeanPostProcessPoint 的构造方法 ##################");
      System.out.println();
   }

   /**
    * bean初始化之前
    *
    * @param bean
    * @param beanName
    * @return
    * @throws BeansException
    */
   @Override
   public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
      /**
       * 可以根据需要在这里进行某个bean的扩展
       */
      if (bean instanceof TestController) {
         System.out.println("-----------------------[BeanPostProcessPoint]  扩展点演示 # postProcessBeforeInitialization  开始--------------------------------------");
         System.out.println("[BeanPostProcessPoint]  扩展点演示 # postProcessBeforeInitialization , crurrentBeanName: " + beanName);
         System.out.println("这里只有当bean是TestController时候才打印 否则的话控制台要爆满了 根本看不清 ");
         System.out.println("时机 bean实例化后，初始化之前");
         System.out.println("-----------------------[BeanPostProcessPoint]  扩展点演示 # postProcessBeforeInitialization  结束--------------------------------------");
         System.out.println();
      }
      return bean;
   }

   /**
    * bean初始化之后
    *
    * @param bean
    * @param beanName
    * @return
    * @throws BeansException
    */
   @Override
   public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
      /**
       * 可以根据需要在这里进行某个bean的扩展
       */
      if (bean instanceof TestController) {
         System.out.println("-----------------------[BeanPostProcessPoint]  扩展点演示 # postProcessAfterInitialization  开始--------------------------------------");
         System.out.println("[BeanPostProcessPoint]  扩展点演示 # postProcessAfterInitialization , crurrentBeanName: " + beanName);
         System.out.println("这里只有当bean是TestController时候才打印 否则的话控制台要爆满了 根本看不清 ");
         System.out.println("时机 bean初始化后");
         System.out.println("-----------------------[BeanPostProcessPoint]  扩展点演示 # postProcessAfterInitialization  结束--------------------------------------");
         System.out.println();
      }
      return bean;
   }



   /*

   AbstractAutowireCapableBeanFactory的这个方法


   protected Object initializeBean(String beanName, Object bean, @Nullable RootBeanDefinition mbd) {
        if (System.getSecurityManager() != null) {
            AccessController.doPrivileged(() -> {
                this.invokeAwareMethods(beanName, bean);
                return null;
            }, this.getAccessControlContext());
        } else {
            this.invokeAwareMethods(beanName, bean);
        }

        Object wrappedBean = bean;
        if (mbd == null || !mbd.isSynthetic()) {
            wrappedBean = this.applyBeanPostProcessorsBeforeInitialization(bean, beanName);
        }

        try {
            this.invokeInitMethods(beanName, wrappedBean, mbd);
        } catch (Throwable var6) {
            throw new BeanCreationException(mbd != null ? mbd.getResourceDescription() : null, beanName, "Invocation of init method failed", var6);
        }

        if (mbd == null || !mbd.isSynthetic()) {
            wrappedBean = this.applyBeanPostProcessorsAfterInitialization(wrappedBean, beanName);
        }

        return wrappedBean;
    }


     public Object applyBeanPostProcessorsBeforeInitialization(Object existingBean, String beanName) throws BeansException {
        Object result = existingBean;

        Object current;
        for(Iterator var4 = this.getBeanPostProcessors().iterator(); var4.hasNext(); result = current) {
            BeanPostProcessor processor = (BeanPostProcessor)var4.next();
            current = processor.postProcessBeforeInitialization(result, beanName); //TODO 回调postProcessBeforeInitialization方法 在此处  postProcessAfterInitialization方法就不看了 一样的逻辑
            if (current == null) {
                return result;
            }
        }

        return result;
    }

    */
}

扩展点4

`实现 InitializingBean的 afterPropertiesSet方法`

时机: bean实例化并属性赋值之后他其实与上边扩展点3的关系是 postProcessBeforeInitialization -> initializingBean -> postProcessAfterInitialization 理解扩展点3，你也就知道这个的时机了

注意:afterPropertiesSet发生作用的时机是当前类的实例化的时候，而BeanPostProcessor则是所有类，这也是为什么afterPropertiesSet的函数中没有参数

@Component
public class InitializingBeanPoint implements InitializingBean {
   public InitializingBeanPoint() {
      System.out.println();
      System.out.println("################## InitializingBeanPoint 的构造方法 ################## ");
      System.out.println();
   }

   @Override
   public void afterPropertiesSet() throws Exception {
      System.out.println("-----------------------[InitializingBeanPoint]  扩展点演示 # afterPropertiesSet  开始--------------------------------------");
      System.out.println("[InitializingBean] # afterPropertiesSet");
      System.out.println("时机: bean实例化后 AbstractAutowireCapableBeanFactory 类的 initializeBean方法 中的 invokeInitMethods(beanName, wrappedBean, mbd);");
      System.out.println("-----------------------[InitializingBeanPoint]  扩展点演示 # afterPropertiesSet  结束--------------------------------------");
      System.out.println();
   }

   /*
   AbstractAutowireCapableBeanFactory的这个方法
   protected Object initializeBean(String beanName, Object bean, @Nullable RootBeanDefinition mbd) {
        if (System.getSecurityManager() != null) {
            AccessController.doPrivileged(() -> {
                this.invokeAwareMethods(beanName, bean);
                return null;
            }, this.getAccessControlContext());
        } else {
            this.invokeAwareMethods(beanName, bean);
        }

        Object wrappedBean = bean;
        if (mbd == null || !mbd.isSynthetic()) {
            wrappedBean = this.applyBeanPostProcessorsBeforeInitialization(bean, beanName);
        }

        try {
            this.invokeInitMethods(beanName, wrappedBean, mbd);
        } catch (Throwable var6) {
            throw new BeanCreationException(mbd != null ? mbd.getResourceDescription() : null, beanName, "Invocation of init method failed", var6);
        }

        if (mbd == null || !mbd.isSynthetic()) {
            wrappedBean = this.applyBeanPostProcessorsAfterInitialization(wrappedBean, beanName);
        }

        return wrappedBean;
    }


    protected void invokeInitMethods(String beanName, Object bean, @Nullable RootBeanDefinition mbd) throws Throwable {
        boolean isInitializingBean = bean instanceof InitializingBean;
        if (isInitializingBean && (mbd == null || !mbd.isExternallyManagedInitMethod("afterPropertiesSet"))) {
            if (this.logger.isTraceEnabled()) {
                this.logger.trace("Invoking afterPropertiesSet() on bean with name '" + beanName + "'");
            }

            if (System.getSecurityManager() != null) {
                try {
                    AccessController.doPrivileged(() -> {
                        ((InitializingBean)bean).afterPropertiesSet();
                        return null;
                    }, this.getAccessControlContext());
                } catch (PrivilegedActionException var6) {
                    throw var6.getException();
                }
            } else {
                ((InitializingBean)bean).afterPropertiesSet();//TODO 回调在此处
            }
        }

        if (mbd != null && bean.getClass() != NullBean.class) {
            String initMethodName = mbd.getInitMethodName();
            if (StringUtils.hasLength(initMethodName) && (!isInitializingBean || !"afterPropertiesSet".equals(initMethodName)) && !mbd.isExternallyManagedInitMethod(initMethodName)) {
                this.invokeCustomInitMethod(beanName, bean, mbd);
            }
        }

    }
    */
}

扩展点5

`初始化方法(方法名称你随意定就行）然后在方法上加 @PostConstruct注解即可,或者加上 @PreDestroy注解`

时机: 初始化完成之后调用(@PostConstruct)所在的方法；销毁之前调用(@PreDestroy)所在的方法

@Component
public class PostConstructPoint {

   public PostConstructPoint() {
      System.out.println();
      System.out.println("################## PostConstructPoint的构造方法 ################## ");
      System.out.println();
   }

   @PostConstruct
   public void init(){
      System.out.println();
      System.out.println("-----------------------[PostConstructPoint]  扩展点演示 @PostConstruct 开始--------------------------------------");
      System.out.println("[PostConstructPoint执行时机演示]");
      System.out.println("-----------------------[PostConstructPoint]  扩展点演示 @PostConstruct 结束--------------------------------------");
      System.out.println();
   }

   @PreDestroy
   public void destroy(){
      System.out.println();
      System.out.println("-----------------------[PostConstructPoint]  扩展点演示 @PreDestroy 开始--------------------------------------");
      System.out.println("[PostConstructPoint执行时机演示]");
      System.out.println("-----------------------[PostConstructPoint]  扩展点演示 @PreDestroy 结束--------------------------------------");
      System.out.println();
   }
}

扩展点6

`实现 BeanNameAware 的 setBeanName方法`

注意 从源码可以看出还可以实现 BeanClassLoaderAware 的 setBeanClassLoader方法，以及 BeanFactoryAware 的 setBeanFactory方法 时机: bean实例化之后初始化之前作用的话从方法名就知道这里不在赘述

@Component
public class BeanNameAwarePoint implements BeanNameAware {

   @Override
   public void setBeanName(String name) {
      System.out.println("------------BeanNameAwarePoint # setBeanName 开始-------------");
      System.out.println("[BeanNameAwarePoint]  扩展点演示 # setBeanName name: "+name);
      System.out.println("------------BeanNameAwarePoint # setBeanName 结束-------------");
      System.out.println();
   }

/*

AbstractAutowireCapableBeanFactory  类的


protected Object initializeBean(String beanName, Object bean, @Nullable RootBeanDefinition mbd) {
        if (System.getSecurityManager() != null) {
            AccessController.doPrivileged(() -> {
                this.invokeAwareMethods(beanName, bean);
                return null;
            }, this.getAccessControlContext());
        } else {
            this.invokeAwareMethods(beanName, bean);
        }

        Object wrappedBean = bean;
        if (mbd == null || !mbd.isSynthetic()) {
            wrappedBean = this.applyBeanPostProcessorsBeforeInitialization(bean, beanName);
        }

        try {
            this.invokeInitMethods(beanName, wrappedBean, mbd);
        } catch (Throwable var6) {
            throw new BeanCreationException(mbd != null ? mbd.getResourceDescription() : null, beanName, "Invocation of init method failed", var6);
        }

        if (mbd == null || !mbd.isSynthetic()) {
            wrappedBean = this.applyBeanPostProcessorsAfterInitialization(wrappedBean, beanName);
        }

        return wrappedBean;
    }


    private void invokeAwareMethods(String beanName, Object bean) {
        if (bean instanceof Aware) {
            if (bean instanceof BeanNameAware) {
                ((BeanNameAware)bean).setBeanName(beanName); //TODO 此处回调 BeanNameAware 的 setBeanName方法
            }

            if (bean instanceof BeanClassLoaderAware) {
                ClassLoader bcl = this.getBeanClassLoader();
                if (bcl != null) {
                    ((BeanClassLoaderAware)bean).setBeanClassLoader(bcl);//TODO 此处回调 BeanClassLoaderAware 的 setBeanClassLoader方法
                }
            }

            if (bean instanceof BeanFactoryAware) {
                ((BeanFactoryAware)bean).setBeanFactory(this);//TODO 此处回调 BeanFactoryAware 的 setBeanFactory方法
            }
        }

    }


 */

}

扩展点7

`实现 CommandLineRunner 的run方法或者 ApplicationRunner的run方法`

从原代码中可以看出这俩函数的调用顺序

时机: 容器刷新完成后

实现 ApplicationRunner

@Component
public class ApplicationRunnerPoint implements ApplicationRunner {

   @Override
   public void run(ApplicationArguments args) throws Exception {
      System.out.println("-----------------------[ApplicationRunnerPoint]  扩展点演示 # run  开始--------------------------------------");
      System.out.println("[ApplicationRunnerPoint] # run ; "+"时机：此时已经刷新容器处于run方法的后半部分了 接下来run方法将发布running事件");
      System.out.println("-----------------------[ApplicationRunnerPoint]  扩展点演示 # run  结束--------------------------------------");
      System.out.println();
   }
   /*

   SpringApplication 类的 run方法中的 callRunners


   private void callRunners(ApplicationContext context, ApplicationArguments args) {
        List<Object> runners = new ArrayList();
        runners.addAll(context.getBeansOfType(ApplicationRunner.class).values());
        runners.addAll(context.getBeansOfType(CommandLineRunner.class).values());
        AnnotationAwareOrderComparator.sort(runners);
        Iterator var4 = (new LinkedHashSet(runners)).iterator();

        while(var4.hasNext()) {
            Object runner = var4.next();
            if (runner instanceof ApplicationRunner) {
                this.callRunner((ApplicationRunner)runner, args);
            }

            if (runner instanceof CommandLineRunner) {
                this.callRunner((CommandLineRunner)runner, args);
            }
        }

    }

    */
}

实现 CommandLineRunner

@Component
public class CommandLineRunnerPoint implements CommandLineRunner {
   @Override
   public void run(String... args) throws Exception {
      System.out.println("-----------------------[CommandLineRunnerPoint]  扩展点演示 # run  开始--------------------------------------");
      System.out.println("[CommandLineRunnerPoint] # run ; "+"时机：此时已经刷新容器处于run方法的后半部分了 接下来run方法将发布running事件");
      System.out.println("-----------------------[CommandLineRunnerPoint]  扩展点演示 # run  结束--------------------------------------");
      System.out.println();
   }
   /*

   SpringApplication 类的 run方法中的 callRunners


   private void callRunners(ApplicationContext context, ApplicationArguments args) {
        List<Object> runners = new ArrayList();
        runners.addAll(context.getBeansOfType(ApplicationRunner.class).values());
        runners.addAll(context.getBeansOfType(CommandLineRunner.class).values());
        AnnotationAwareOrderComparator.sort(runners);
        Iterator var4 = (new LinkedHashSet(runners)).iterator();

        while(var4.hasNext()) {
            Object runner = var4.next();
            if (runner instanceof ApplicationRunner) {
                this.callRunner((ApplicationRunner)runner, args);
            }

            if (runner instanceof CommandLineRunner) {
                this.callRunner((CommandLineRunner)runner, args);
            }
        }

    }

    */
}

扩展点8

`bean销毁时候（也算一个扩展点吧我个人觉得）`

@Component
public class DisposableBeanPoint implements DisposableBean {
   @Override
   public void destroy() throws Exception {
      System.out.println("[DisposableBeanPoint] DisposableBeanPoint");
   }
}

扩展点9

`实现 InstantiationAwareBeanPostProcessor的这几个方法`

postProcessBeforeInitialization
postProcessAfterInitialization
postProcessBeforeInstantiation
postProcessAfterInstantiation
postProcessPropertyValues（注意他已经标记为@Deprecated）我的springboot版本中他被 postProcessProperties替换了

发现没其实 InstantiationAwareBeanPostProcessor也是个 BeanPostProcessor

@Component
public class InstantiationAwareBeanPostProcessorPoint implements InstantiationAwareBeanPostProcessor {
   @Override
   public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
//    System.out.println("[InstantiationAwareBeanPostProcessorPoint] before initialization " + beanName);
      return bean;
   }

   @Override
   public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
//    System.out.println("[InstantiationAwareBeanPostProcessorPoint] after initialization " + beanName);
      return bean;
   }

   @Override
   public Object postProcessBeforeInstantiation(Class<?> beanClass, String beanName) throws BeansException {
//    System.out.println("[InstantiationAwareBeanPostProcessorPoint] before instantiation " + beanName);
      return null;
   }

   @Override
   public boolean postProcessAfterInstantiation(Object bean, String beanName) throws BeansException {
//    System.out.println("[InstantiationAwareBeanPostProcessorPoint] after instantiation " + beanName);
      return true;
   }

   @Override
   public PropertyValues postProcessPropertyValues(PropertyValues pvs, PropertyDescriptor[] pds, Object bean, String beanName) throws BeansException {
//    System.out.println("[InstantiationAwareBeanPostProcessorPoint] postProcessPropertyValues " + beanName);
      return pvs;
   }
   
}

注意: 这个方法我们就不做打印了因为打印的话控制台刷的爆满这里解释下这几个方法的作用吧

InstantiationAwareBeanPostProcessor 小结

InstantiationAwareBeanPostProcessor接口继承BeanPostProcessor接口，它内部提供了3个方法，再加上BeanPostProcessor接口内部的2个方法，所以实现这个接口需要实现5个方法。InstantiationAwareBeanPostProcessor接口的主要作用在于目标对象的实例化过程中需要处理的事情，包括实例化对象的前后过程以及实例的属性设置
postProcessBeforeInstantiation (InstantiationAwareBeanPostProcessor自己的) 方法是最先执行的方法，它在目标对象实例化之前调用，该方法的返回值类型是Object，我们可以返回任何类型的值。由于这个时候目标对象还未实例化，所以这个返回值可以用来代替原本该生成的目标对象的实例(比如代理对象)。如果该方法的返回值代替原本该生成的目标对象，后续只有postProcessAfterInitialization方法会调用，其它方法不再调用；否则按照正常的流程走
postProcessAfterInstantiation (InstantiationAwareBeanPostProcessor自己的) 方法在目标对象实例化之后调用，这个时候对象已经被实例化，但是该实例的属性还未被设置，都是null。如果该方法返回false，会忽略属性值的设置；如果返回true，会按照正常流程设置属性值
postProcessPropertyValues(我这个springboot版本(2.1.x)已经被 postProcessProperties替换) (InstantiationAwareBeanPostProcessor自己的) 方法对属性值进行修改(这个时候属性值还未被设置，但是我们可以修改原本该设置进去的属性值)。如果postProcessProperties方法返回false，该方法不会被调用。可以在该方法内对属性值进行修改
父接口BeanPostProcessor的2个方法postProcessBeforeInitialization和postProcessAfterInitialization是在对象被实例化之后 (一个是在初始化之前，一个是在初始化之后调用)
Instantiation表示实例化，Initialization表示初始化。实例化前的意思在对象还未生成，初始化前的意思在对象已经生成，但是属性还没有赋值阶段

扩展点10

实现SmartInstantiationAwareBeanPostProcessor的这三个方法 (其实不止3个一共有8个 ) 其实 SmartInstantiationAwareBeanPostProcessor(自有三个方法) 他也是继承了 InstantiationAwareBeanPostProcessor(即上边的扩展点9 他自有3个方法) 而 InstantiationAwareBeanPostProcessor继承了 BeanPostProcessor(自有2个方法)

所以我们说 SmartInstantiationAwareBeanPostProcessor 其实一共有8个方法可以实现这里我们只看下 SmartInstantiationAwareBeanPostProcessor 自有的3个方法

predictBeanType
determineCandidateConstructors
getEarlyBeanReference

@Component
public class SmartInstantiationAwareBeanPostProcessorPoint implements SmartInstantiationAwareBeanPostProcessor {


   @Override
   public Class<?> predictBeanType(Class<?> beanClass, String beanName) throws BeansException {
//    System.out.println("[SmartInstantiationAwareBeanPostProcessorPoint] predictBeanType " + beanName);
      return beanClass;
   }

   @Override
   public Constructor<?>[] determineCandidateConstructors(Class<?> beanClass, String beanName) throws BeansException {
//    System.out.println("[SmartInstantiationAwareBeanPostProcessorPoint] determineCandidateConstructors " + beanName);
      return null;
   }

   @Override
   public Object getEarlyBeanReference(Object bean, String beanName) throws BeansException {
//    System.out.println("[SmartInstantiationAwareBeanPostProcessorPoint] getEarlyBeanReference " + beanName);
      return bean;
   }

   /*

   AbstractAutowireCapableBeanFactory类的这个方法 predictBeanType

   protected Class<?> predictBeanType(String beanName, RootBeanDefinition mbd, Class<?>... typesToMatch) {
        Class<?> targetType = this.determineTargetType(beanName, mbd, typesToMatch);
        if (targetType != null && !mbd.isSynthetic() && this.hasInstantiationAwareBeanPostProcessors()) {
            Iterator var5 = this.getBeanPostProcessors().iterator();

            while(var5.hasNext()) {
                BeanPostProcessor bp = (BeanPostProcessor)var5.next();
                if (bp instanceof SmartInstantiationAwareBeanPostProcessor) {
                    SmartInstantiationAwareBeanPostProcessor ibp = (SmartInstantiationAwareBeanPostProcessor)bp;
                    Class<?> predicted = ibp.predictBeanType(targetType, beanName);
                    if (predicted != null && (typesToMatch.length != 1 || FactoryBean.class != typesToMatch[0] || FactoryBean.class.isAssignableFrom(predicted))) {
                        return predicted;
                    }
                }
            }
        }

        return targetType;
    }

    */

}

注意这个和上边扩展点9一样我们也不做打印了，这里总结下该扩展点几个方法的作用

SmartInstantiationAwareBeanPostProcessor 小结

SmartInstantiationAwareBeanPostProcessor接口继承InstantiationAwareBeanPostProcessor接口，它内部提供了3个方法，再加上父接口的5个方法，所以实现这个接口需要实现8个方法。SmartInstantiationAwareBeanPostProcessor接口的主要作用也是在于目标对象的实例化过程中需要处理的事情。它是InstantiationAwareBeanPostProcessor接口的一个扩展。主要在Spring框架内部使用
predictBeanType方法用于预测Bean的类型，返回第一个预测成功的Class类型，如果不能预测返回null。主要在于BeanDefinition无法确定Bean类型的时候调用该方法来确定类型
determineCandidateConstructors方法用于选择合适的构造器，比如类有多个构造器，可以实现这个方法选择合适的构造器并用于实例化对象。该方法在postProcessBeforeInstantiation方法和postProcessAfterInstantiation方法之间调用，如果postProcessBeforeInstantiation方法返回了一个新的实例代替了原本该生成的实例，那么该方法会被忽略
getEarlyBeanReference主要用于解决 循环依赖 问题。比如ReferenceA实例内部有ReferenceB的引用，ReferenceB实例内部有ReferenceA的引用。首先先实例化ReferenceA，实例化完成之后提前把这个bean暴露在ObjectFactory中，然后populate属性，这个时候发现需要ReferenceB。然后去实例化ReferenceB，在实例化ReferenceB的时候它需要ReferenceA的实例才能继续，这个时候就会去ObjectFactory中找出了ReferenceA实例，ReferenceB顺利实例化。ReferenceB实例化之后，ReferenceA的populate属性过程也成功完成，注入了ReferenceB实例。提前把这个bean暴露在ObjectFactory中，这个ObjectFactory获取的实例就是通过getEarlyBeanReference方法得到的

另外关于循环依赖这里附上一张图片 (看这张图前，最好要知道spring中的一级缓存，二级缓存，三级缓存这里不准备过多描述相关知识点，相关内容我也准备写一篇文章，但不是现在)

关于代码部分请直接移步 github.com/598572/xzll…

这里直接把控制台输出拿过来

注意从输出先后顺序可以看出这些扩展点的调用时机

/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/bin/java -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -javaagent:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar=53897:/Applications/IntelliJ IDEA.app/Contents/bin -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true -Dfile.encoding=UTF-8 -classpath /Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/lib/tools.jar:/Users/hzz/myself_project/xzll/study-admin/study-admin-service/target/classes:/Users/hzz/.m2/repository/org/mybatis/spring/boot/mybatis-spring-boot-starter/2.1.4/mybatis-spring-boot-starter-2.1.4.jar:/Users/hzz/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.13.RELEASE/spring-boot-starter-2.1.13.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/boot/spring-boot/2.1.13.RELEASE/spring-boot-2.1.13.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.13.RELEASE/spring-boot-starter-logging-2.1.13.RELEASE.jar:/Users/hzz/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/hzz/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/hzz/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/hzz/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/hzz/.m2/repository/org/slf4j/jul-to-slf4j/1.7.30/jul-to-slf4j-1.7.30.jar:/Users/hzz/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/hzz/.m2/repository/org/springframework/boot/spring-boot-starter-jdbc/2.1.13.RELEASE/spring-boot-starter-jdbc-2.1.13.RELEASE.jar:/Users/hzz/.m2/repository/com/zaxxer/HikariCP/3.2.0/HikariCP-3.2.0.jar:/Users/hzz/.m2/repository/org/springframework/spring-jdbc/5.1.9.RELEASE/spring-jdbc-5.1.9.RELEASE.jar:/Users/hzz/.m2/repository/org/mybatis/spring/boot/mybatis-spring-boot-autoconfigure/2.1.4/mybatis-spring-boot-autoconfigure-2.1.4.jar:/Users/hzz/.m2/repository/org/mybatis/mybatis/3.5.6/mybatis-3.5.6.jar:/Users/hzz/.m2/repository/org/mybatis/mybatis-spring/2.0.6/mybatis-spring-2.0.6.jar:/Users/hzz/.m2/repository/mysql/mysql-connector-java/8.0.23/mysql-connector-java-8.0.23.jar:/Users/hzz/.m2/repository/com/github/pagehelper/pagehelper-spring-boot-starter/1.3.0/pagehelper-spring-boot-starter-1.3.0.jar:/Users/hzz/.m2/repository/com/github/pagehelper/pagehelper-spring-boot-autoconfigure/1.3.0/pagehelper-spring-boot-autoconfigure-1.3.0.jar:/Users/hzz/.m2/repository/com/github/pagehelper/pagehelper/5.2.0/pagehelper-5.2.0.jar:/Users/hzz/.m2/repository/com/github/jsqlparser/jsqlparser/3.2/jsqlparser-3.2.jar:/Users/hzz/.m2/repository/com/baomidou/mybatis-plus-boot-starter/3.4.3.1/mybatis-plus-boot-starter-3.4.3.1.jar:/Users/hzz/.m2/repository/com/baomidou/mybatis-plus/3.4.3.1/mybatis-plus-3.4.3.1.jar:/Users/hzz/.m2/repository/com/baomidou/mybatis-plus-extension/3.4.3.1/mybatis-plus-extension-3.4.3.1.jar:/Users/hzz/.m2/repository/com/baomidou/mybatis-plus-core/3.4.3.1/mybatis-plus-core-3.4.3.1.jar:/Users/hzz/.m2/repository/com/baomidou/mybatis-plus-annotation/3.4.3.1/mybatis-plus-annotation-3.4.3.1.jar:/Users/hzz/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.13.RELEASE/spring-boot-autoconfigure-2.1.13.RELEASE.jar:/Users/hzz/myself_project/xzll/study-common/target/classes:/Users/hzz/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.13.RELEASE/spring-boot-starter-aop-2.1.13.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/spring-aop/5.1.9.RELEASE/spring-aop-5.1.9.RELEASE.jar:/Users/hzz/.m2/repository/org/aspectj/aspectjweaver/1.9.5/aspectjweaver-1.9.5.jar:/Users/hzz/myself_project/xzll/study-admin/study-admin-api/target/classes:/Users/hzz/.m2/repository/org/springframework/cloud/spring-cloud-starter-openfeign/2.1.5.RELEASE/spring-cloud-starter-openfeign-2.1.5.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/cloud/spring-cloud-openfeign-core/2.1.5.RELEASE/spring-cloud-openfeign-core-2.1.5.RELEASE.jar:/Users/hzz/.m2/repository/io/github/openfeign/form/feign-form-spring/3.8.0/feign-form-spring-3.8.0.jar:/Users/hzz/.m2/repository/io/github/openfeign/form/feign-form/3.8.0/feign-form-3.8.0.jar:/Users/hzz/.m2/repository/io/github/openfeign/feign-core/10.4.0/feign-core-10.4.0.jar:/Users/hzz/.m2/repository/io/github/openfeign/feign-slf4j/10.4.0/feign-slf4j-10.4.0.jar:/Users/hzz/.m2/repository/io/github/openfeign/feign-hystrix/10.4.0/feign-hystrix-10.4.0.jar:/Users/hzz/myself_project/xzll/study-starter/util/target/classes:/Users/hzz/myself_project/xzll/study-starter/pay/target/classes:/Users/hzz/.m2/repository/org/springframework/boot/spring-boot-starter-websocket/2.1.13.RELEASE/spring-boot-starter-websocket-2.1.13.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/spring-messaging/5.1.9.RELEASE/spring-messaging-5.1.9.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/spring-beans/5.1.9.RELEASE/spring-beans-5.1.9.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/spring-websocket/5.1.9.RELEASE/spring-websocket-5.1.9.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/spring-context/5.1.9.RELEASE/spring-context-5.1.9.RELEASE.jar:/Users/hzz/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-config/2.1.4.RELEASE/spring-cloud-starter-alibaba-nacos-config-2.1.4.RELEASE.jar:/Users/hzz/.m2/repository/com/alibaba/spring/spring-context-support/1.0.10/spring-context-support-1.0.10.jar:/Users/hzz/.m2/repository/com/alibaba/nacos/nacos-client/1.4.1/nacos-client-1.4.1.jar:/Users/hzz/.m2/repository/com/alibaba/nacos/nacos-common/1.4.1/nacos-common-1.4.1.jar:/Users/hzz/.m2/repository/org/apache/httpcomponents/httpasyncclient/4.1.4/httpasyncclient-4.1.4.jar:/Users/hzz/.m2/repository/org/apache/httpcomponents/httpcore/4.4.13/httpcore-4.4.13.jar:/Users/hzz/.m2/repository/org/apache/httpcomponents/httpcore-nio/4.4.13/httpcore-nio-4.4.13.jar:/Users/hzz/.m2/repository/com/alibaba/nacos/nacos-api/1.4.1/nacos-api-1.4.1.jar:/Users/hzz/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/hzz/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.6.RELEASE/spring-cloud-commons-2.1.6.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/security/spring-security-crypto/5.1.6.RELEASE/spring-security-crypto-5.1.6.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.6.RELEASE/spring-cloud-context-2.1.6.RELEASE.jar:/Users/hzz/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.4.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.4.RELEASE.jar:/Users/hzz/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-commons/2.1.4.RELEASE/spring-cloud-alibaba-commons-2.1.4.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.5.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.5.RELEASE.jar:/Users/hzz/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/hzz/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/hzz/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/hzz/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/hzz/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/hzz/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/hzz/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/hzz/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/hzz/.m2/repository/org/apache/httpcomponents/httpclient/4.5.11/httpclient-4.5.11.jar:/Users/hzz/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/hzz/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/hzz/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/hzz/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/hzz/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/hzz/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/hzz/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/hzz/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/hzz/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/hzz/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-hystrix/2.1.5.RELEASE/spring-cloud-starter-netflix-hystrix-2.1.5.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.6.RELEASE/spring-cloud-starter-2.1.6.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/security/spring-security-rsa/1.0.9.RELEASE/spring-security-rsa-1.0.9.RELEASE.jar:/Users/hzz/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.64/bcpkix-jdk15on-1.64.jar:/Users/hzz/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.64/bcprov-jdk15on-1.64.jar:/Users/hzz/.m2/repository/org/springframework/cloud/spring-cloud-netflix-hystrix/2.1.5.RELEASE/spring-cloud-netflix-hystrix-2.1.5.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.5.RELEASE/spring-cloud-netflix-ribbon-2.1.5.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.5.RELEASE/spring-cloud-netflix-archaius-2.1.5.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.5.RELEASE/spring-cloud-starter-netflix-archaius-2.1.5.RELEASE.jar:/Users/hzz/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/hzz/.m2/repository/com/google/code/findbugs/jsr305/3.0.1/jsr305-3.0.1.jar:/Users/hzz/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/hzz/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/hzz/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/hzz/.m2/repository/com/netflix/hystrix/hystrix-serialization/1.5.18/hystrix-serialization-1.5.18.jar:/Users/hzz/.m2/repository/com/fasterxml/jackson/module/jackson-module-afterburner/2.9.9/jackson-module-afterburner-2.9.9.jar:/Users/hzz/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/hzz/.m2/repository/com/netflix/hystrix/hystrix-metrics-event-stream/1.5.18/hystrix-metrics-event-stream-1.5.18.jar:/Users/hzz/.m2/repository/com/netflix/hystrix/hystrix-javanica/1.5.18/hystrix-javanica-1.5.18.jar:/Users/hzz/.m2/repository/org/ow2/asm/asm/5.0.4/asm-5.0.4.jar:/Users/hzz/.m2/repository/io/reactivex/rxjava-reactive-streams/1.2.1/rxjava-reactive-streams-1.2.1.jar:/Users/hzz/.m2/repository/org/reactivestreams/reactive-streams/1.0.3/reactive-streams-1.0.3.jar:/Users/hzz/.m2/repository/commons-cli/commons-cli/1.4/commons-cli-1.4.jar:/Users/hzz/.m2/repository/org/redisson/redisson/3.16.0/redisson-3.16.0.jar:/Users/hzz/.m2/repository/io/netty/netty-common/4.1.38.Final/netty-common-4.1.38.Final.jar:/Users/hzz/.m2/repository/io/netty/netty-codec/4.1.38.Final/netty-codec-4.1.38.Final.jar:/Users/hzz/.m2/repository/io/netty/netty-buffer/4.1.38.Final/netty-buffer-4.1.38.Final.jar:/Users/hzz/.m2/repository/io/netty/netty-transport/4.1.38.Final/netty-transport-4.1.38.Final.jar:/Users/hzz/.m2/repository/io/netty/netty-resolver/4.1.38.Final/netty-resolver-4.1.38.Final.jar:/Users/hzz/.m2/repository/io/netty/netty-resolver-dns/4.1.38.Final/netty-resolver-dns-4.1.38.Final.jar:/Users/hzz/.m2/repository/io/netty/netty-codec-dns/4.1.38.Final/netty-codec-dns-4.1.38.Final.jar:/Users/hzz/.m2/repository/io/netty/netty-handler/4.1.38.Final/netty-handler-4.1.38.Final.jar:/Users/hzz/.m2/repository/javax/cache/cache-api/1.1.1/cache-api-1.1.1.jar:/Users/hzz/.m2/repository/io/projectreactor/reactor-core/3.2.11.RELEASE/reactor-core-3.2.11.RELEASE.jar:/Users/hzz/.m2/repository/io/reactivex/rxjava3/rxjava/3.0.12/rxjava-3.0.12.jar:/Users/hzz/.m2/repository/org/jboss/marshalling/jboss-marshalling-river/2.0.11.Final/jboss-marshalling-river-2.0.11.Final.jar:/Users/hzz/.m2/repository/org/jboss/marshalling/jboss-marshalling/2.0.11.Final/jboss-marshalling-2.0.11.Final.jar:/Users/hzz/.m2/repository/org/slf4j/slf4j-api/1.7.30/slf4j-api-1.7.30.jar:/Users/hzz/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/hzz/.m2/repository/com/fasterxml/jackson/dataformat/jackson-dataformat-yaml/2.9.9/jackson-dataformat-yaml-2.9.9.jar:/Users/hzz/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.9/jackson-core-2.9.9.jar:/Users/hzz/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.9/jackson-databind-2.9.9.jar:/Users/hzz/.m2/repository/net/bytebuddy/byte-buddy/1.9.16/byte-buddy-1.9.16.jar:/Users/hzz/.m2/repository/org/jodd/jodd-bean/5.1.6/jodd-bean-5.1.6.jar:/Users/hzz/.m2/repository/org/jodd/jodd-core/5.1.6/jodd-core-5.1.6.jar:/Users/hzz/.m2/repository/io/springfox/springfox-swagger2/2.9.2/springfox-swagger2-2.9.2.jar:/Users/hzz/.m2/repository/io/swagger/swagger-annotations/1.5.20/swagger-annotations-1.5.20.jar:/Users/hzz/.m2/repository/io/swagger/swagger-models/1.5.20/swagger-models-1.5.20.jar:/Users/hzz/.m2/repository/io/springfox/springfox-spi/2.9.2/springfox-spi-2.9.2.jar:/Users/hzz/.m2/repository/io/springfox/springfox-core/2.9.2/springfox-core-2.9.2.jar:/Users/hzz/.m2/repository/io/springfox/springfox-schema/2.9.2/springfox-schema-2.9.2.jar:/Users/hzz/.m2/repository/io/springfox/springfox-swagger-common/2.9.2/springfox-swagger-common-2.9.2.jar:/Users/hzz/.m2/repository/io/springfox/springfox-spring-web/2.9.2/springfox-spring-web-2.9.2.jar:/Users/hzz/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/hzz/.m2/repository/org/springframework/plugin/spring-plugin-core/1.2.0.RELEASE/spring-plugin-core-1.2.0.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/plugin/spring-plugin-metadata/1.2.0.RELEASE/spring-plugin-metadata-1.2.0.RELEASE.jar:/Users/hzz/.m2/repository/org/mapstruct/mapstruct/1.2.0.Final/mapstruct-1.2.0.Final.jar:/Users/hzz/.m2/repository/io/springfox/springfox-swagger-ui/2.9.2/springfox-swagger-ui-2.9.2.jar:/Users/hzz/.m2/repository/com/google/guava/guava/20.0/guava-20.0.jar:/Users/hzz/.m2/repository/com/alibaba/druid/1.1.18/druid-1.1.18.jar:/Users/hzz/.m2/repository/org/freemarker/freemarker/2.3.30/freemarker-2.3.30.jar:/Users/hzz/.m2/repository/com/alibaba/easyexcel/2.2.6/easyexcel-2.2.6.jar:/Users/hzz/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/hzz/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/hzz/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/hzz/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/hzz/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/hzz/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/hzz/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/hzz/.m2/repository/cglib/cglib/3.1/cglib-3.1.jar:/Users/hzz/.m2/repository/org/ehcache/ehcache/3.6.3/ehcache-3.6.3.jar:/Users/hzz/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.13.RELEASE/spring-boot-starter-web-2.1.13.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.13.RELEASE/spring-boot-starter-json-2.1.13.RELEASE.jar:/Users/hzz/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.9/jackson-datatype-jdk8-2.9.9.jar:/Users/hzz/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.9/jackson-datatype-jsr310-2.9.9.jar:/Users/hzz/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.9/jackson-module-parameter-names-2.9.9.jar:/Users/hzz/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.13.RELEASE/spring-boot-starter-tomcat-2.1.13.RELEASE.jar:/Users/hzz/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.31/tomcat-embed-core-9.0.31.jar:/Users/hzz/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.31/tomcat-embed-el-9.0.31.jar:/Users/hzz/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.31/tomcat-embed-websocket-9.0.31.jar:/Users/hzz/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.18.Final/hibernate-validator-6.0.18.Final.jar:/Users/hzz/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/hzz/.m2/repository/org/jboss/logging/jboss-logging/3.3.3.Final/jboss-logging-3.3.3.Final.jar:/Users/hzz/.m2/repository/org/springframework/spring-web/5.1.9.RELEASE/spring-web-5.1.9.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/spring-webmvc/5.1.9.RELEASE/spring-webmvc-5.1.9.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/spring-expression/5.1.9.RELEASE/spring-expression-5.1.9.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/spring-core/5.1.14.RELEASE/spring-core-5.1.14.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/spring-jcl/5.1.9.RELEASE/spring-jcl-5.1.9.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/boot/spring-boot-starter-data-redis/2.1.13.RELEASE/spring-boot-starter-data-redis-2.1.13.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/data/spring-data-redis/2.1.10.RELEASE/spring-data-redis-2.1.10.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/data/spring-data-keyvalue/2.1.10.RELEASE/spring-data-keyvalue-2.1.10.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/data/spring-data-commons/2.1.10.RELEASE/spring-data-commons-2.1.10.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/spring-tx/5.1.9.RELEASE/spring-tx-5.1.9.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/spring-oxm/5.1.9.RELEASE/spring-oxm-5.1.9.RELEASE.jar:/Users/hzz/.m2/repository/org/springframework/spring-context-support/5.1.9.RELEASE/spring-context-support-5.1.9.RELEASE.jar:/Users/hzz/.m2/repository/io/lettuce/lettuce-core/5.1.8.RELEASE/lettuce-core-5.1.8.RELEASE.jar:/Users/hzz/.m2/repository/org/projectlombok/lombok/1.18.0/lombok-1.18.0.jar:/Users/hzz/.m2/repository/cn/hutool/hutool-all/5.6.6/hutool-all-5.6.6.jar:/Users/hzz/.m2/repository/com/alibaba/fastjson/1.2.46/fastjson-1.2.46.jar:/Users/hzz/.m2/repository/commons-fileupload/commons-fileupload/1.3.1/commons-fileupload-1.3.1.jar:/Users/hzz/.m2/repository/commons-beanutils/commons-beanutils/1.7.0/commons-beanutils-1.7.0.jar:/Users/hzz/.m2/repository/commons-logging/commons-logging/1.2/commons-logging-1.2.jar:/Users/hzz/.m2/repository/commons-codec/commons-codec/1.7/commons-codec-1.7.jar:/Users/hzz/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/hzz/.m2/repository/commons-collections/commons-collections/3.2/commons-collections-3.2.jar:/Users/hzz/.m2/repository/commons-net/commons-net/3.0/commons-net-3.0.jar:/Users/hzz/.m2/repository/org/apache/commons/commons-math3/3.2/commons-math3-3.2.jar:/Users/hzz/.m2/repository/commons-validator/commons-validator/1.4.0/commons-validator-1.4.0.jar:/Users/hzz/.m2/repository/commons-digester/commons-digester/1.8/commons-digester-1.8.jar:/Users/hzz/.m2/repository/commons-httpclient/commons-httpclient/3.1/commons-httpclient-3.1.jar:/Users/hzz/.m2/repository/commons-dbcp/commons-dbcp/1.4/commons-dbcp-1.4.jar:/Users/hzz/.m2/repository/commons-logging/commons-logging-api/1.1/commons-logging-api-1.1.jar:/Users/hzz/.m2/repository/commons-pool/commons-pool/1.6/commons-pool-1.6.jar:/Users/hzz/.m2/repository/commons-io/commons-io/2.9.0/commons-io-2.9.0.jar:/Users/hzz/.m2/repository/org/apache/rocketmq/rocketmq-client/4.5.0/rocketmq-client-4.5.0.jar:/Users/hzz/.m2/repository/org/apache/rocketmq/rocketmq-common/4.5.0/rocketmq-common-4.5.0.jar:/Users/hzz/.m2/repository/org/apache/rocketmq/rocketmq-remoting/4.5.0/rocketmq-remoting-4.5.0.jar:/Users/hzz/.m2/repository/org/apache/rocketmq/rocketmq-logging/4.5.0/rocketmq-logging-4.5.0.jar:/Users/hzz/.m2/repository/io/netty/netty-tcnative-boringssl-static/2.0.29.Final/netty-tcnative-boringssl-static-2.0.29.Final.jar:/Users/hzz/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/hzz/.m2/repository/io/netty/netty-all/4.1.34.Final/netty-all-4.1.34.Final.jar com.xzll.test.StudyTestApplication

  .   ____          _            __ _ _
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( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
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 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::       (v2.1.13.RELEASE)

2021-08-24 10:59:55.542  INFO 26950 --- [           main] c.a.n.c.c.impl.LocalConfigInfoProcessor  : LOCAL_SNAPSHOT_PATH:/Users/hzz/nacos/config
2021-08-24 10:59:55.569  INFO 26950 --- [           main] c.a.nacos.client.config.impl.Limiter     : limitTime:5.0
2021-08-24 10:59:55.595  INFO 26950 --- [           main] c.a.nacos.client.config.utils.JvmUtil    : isMultiInstance:false
2021-08-24 10:59:55.611  WARN 26950 --- [           main] c.a.c.n.c.NacosPropertySourceBuilder     : Ignore the empty nacos configuration and get it based on dataId[study-admin-dev.properties] & group[study-admin]
2021-08-24 10:59:55.617  WARN 26950 --- [           main] c.a.c.n.c.NacosPropertySourceBuilder     : Ignore the empty nacos configuration and get it based on dataId[study-admin-dev-dev.properties] & group[study-admin]
2021-08-24 10:59:55.617  INFO 26950 --- [           main] b.c.PropertySourceBootstrapConfiguration : Located property source: [BootstrapPropertySource {name='bootstrapProperties-study-admin-dev-dev.properties,study-admin'}, BootstrapPropertySource {name='bootstrapProperties-study-admin-dev.properties,study-admin'}, BootstrapPropertySource {name='bootstrapProperties-study-admin-dev,study-admin'}]
------------ApplicationContextInitializerPoint # initialize 开始-------------
[ApplicationContextInitializer扩展点演示] # initialize:  org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@53fd0d10, started on Thu Jan 01 08:00:00 CST 1970, parent: org.springframework.context.annotation.AnnotationConfigApplicationContext@293a5bf6
BeanDefinitionCount count: 5
org.springframework.context.annotation.internalConfigurationAnnotationProcessor
org.springframework.context.annotation.internalAutowiredAnnotationProcessor
org.springframework.context.annotation.internalCommonAnnotationProcessor
org.springframework.context.event.internalEventListenerProcessor
org.springframework.context.event.internalEventListenerFactory
autoConfigurationReport
时机: run 方法中的 this.prepareContext(); 的时候
-------------ApplicationContextInitializerPoint # initialize 结束------------

2021-08-24 10:59:55.653  INFO 26950 --- [           main] com.xzll.test.StudyTestApplication       : The following profiles are active: dev
2021-08-24 10:59:56.395  INFO 26950 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode!
2021-08-24 10:59:56.397  INFO 26950 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data repositories in DEFAULT mode.
2021-08-24 10:59:56.424  INFO 26950 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 14ms. Found 0 repository interfaces.
-----------------------[BeanDefinitionRegistryPostProcessor扩展点演示] # postProcessBeanDefinitionRegistry 开始--------------------------------------
[BeanDefinitionRegistryPostProcessor扩展点演示] # postProcessBeanDefinitionRegistry
时机: refresh()的 this.invokeBeanFactoryPostProcessors(beanFactory); 方法中执行; 此时 bean的定义信息 都已经加载完毕 但是还没到实例化以及初始化阶段
-----------------------[BeanDefinitionRegistryPostProcessor扩展点演示] # postProcessBeanDefinitionRegistry 结束--------------------------------------

2021-08-24 10:59:56.613  INFO 26950 --- [           main] o.s.cloud.context.scope.GenericScope     : BeanFactory id=2ed4fa11-ed98-34ad-90e4-a628563a5b1a
-----------------------[BeanDefinitionRegistryPostProcessor扩展点演示] # postProcessBeanFactory 开始--------------------------------------
[BeanDefinitionRegistryPostProcessor扩展点演示] # postProcessBeanFactory
时机: refresh()的 this.invokeBeanFactoryPostProcessors(beanFactory); 方法中执行; 此时 bean的定义信息 都已经加载完毕 但是还没到实例化以及初始化阶段
-----------------------[BeanDefinitionRegistryPostProcessor扩展点演示] # postProcessBeanFactory 结束--------------------------------------

-----------------------[BeanFactoryPostProcessor扩展点演示] # postProcessBeanFactory 开始--------------------------------------
[BeanFactoryPostProcessor扩展点演示] # postProcessBeanFactory
时机: refresh()的 this.invokeBeanFactoryPostProcessors(beanFactory); 方法中执行; 此时 bean的定义信息 都已经加载完毕 但是还没到实例化以及初始化阶段
-----------------------[BeanFactoryPostProcessor扩展点演示] # postProcessBeanFactory 结束--------------------------------------

2021-08-24 10:59:56.696  INFO 26950 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$3f825871] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

################## BeanPostProcessPoint 的构造方法 ##################

2021-08-24 10:59:57.209  INFO 26950 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8081 (http)
2021-08-24 10:59:57.244  INFO 26950 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2021-08-24 10:59:57.245  INFO 26950 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.31]
2021-08-24 10:59:57.382  INFO 26950 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2021-08-24 10:59:57.382  INFO 26950 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1716 ms
 _ _   |_  _ _|_. ___ _ |    _ 
| | |\/|_)(_| | |_\  |_)||_|_\ 
     /               |         
                        3.4.3.1 

################## InitializingBeanPoint 的构造方法 ################## 

------------InitializingBeanPoint 实现 BeanNameAware # setBeanName 开始-------------
[InitializingBeanPoint 实现 BeanNameAware ]  扩展点演示 # setBeanName name: initializingBeanPoint
------------InitializingBeanPoint 实现 BeanNameAware # setBeanName 结束-------------

-----------------------[BeanPostProcessPoint]  扩展点演示 # postProcessBeforeInitialization  开始--------------------------------------
[BeanPostProcessPoint]  扩展点演示 # postProcessBeforeInitialization , crurrentBeanName: initializingBeanPoint
这里只有当bean是 InitializingBeanPoint 时候才打印 否则的话控制台要爆满了 根本看不清,另外也是为了好和BeanNameAware以及InitializingBean做比较 
时机 bean实例化后，初始化之前
-----------------------[BeanPostProcessPoint]  扩展点演示 # postProcessBeforeInitialization  结束--------------------------------------

-----------------------[InitializingBeanPoint]  扩展点演示 # afterPropertiesSet  开始--------------------------------------
[BeanNameAwarePoint] # afterPropertiesSet
时机: bean实例化后 AbstractAutowireCapableBeanFactory 类的 initializeBean方法 中的 invokeInitMethods(beanName, wrappedBean, mbd);
-----------------------[InitializingBeanPoint]  扩展点演示 # afterPropertiesSet  结束--------------------------------------

-----------------------[BeanPostProcessPoint]  扩展点演示 # postProcessAfterInitialization  开始--------------------------------------
[BeanPostProcessPoint]  扩展点演示 # postProcessAfterInitialization , crurrentBeanName: initializingBeanPoint
这里只有当bean是 InitializingBeanPoint 时候才打印 否则的话控制台要爆满了 根本看不清,另外也是为了好和BeanNameAware以及InitializingBean做比较 
时机 bean初始化后
-----------------------[BeanPostProcessPoint]  扩展点演示 # postProcessAfterInitialization  结束--------------------------------------


################## PostConstructPoint的构造方法 ################## 


-----------------------[PostConstructPoint]  扩展点演示 @PostConstruct 开始--------------------------------------
[PostConstructPoint执行时机演示]
-----------------------[PostConstructPoint]  扩展点演示 @PostConstruct 结束--------------------------------------

2021-08-24 11:00:13.728  INFO 26950 --- [           main] pertySourcedRequestMappingHandlerMapping : Mapped URL path [/v2/api-docs] onto method [public org.springframework.http.ResponseEntity<springfox.documentation.spring.web.json.Json> springfox.documentation.swagger2.web.Swagger2Controller.getDocumentation(java.lang.String,javax.servlet.http.HttpServletRequest)]
2021-08-24 11:00:13.945  INFO 26950 --- [           main] org.redisson.Version                     : Redisson 3.16.0
2021-08-24 11:00:19.176  INFO 26950 --- [sson-netty-4-13] o.r.c.pool.MasterPubSubConnectionPool    : 1 connections initialized for 127.0.0.1/127.0.0.1:6379
2021-08-24 11:00:19.225  INFO 26950 --- [sson-netty-4-19] o.r.c.pool.MasterConnectionPool          : 24 connections initialized for 127.0.0.1/127.0.0.1:6379
2021-08-24 11:00:19.350  WARN 26950 --- [           main] c.n.c.sources.URLConfigurationSource     : No URLs will be polled as dynamic configuration sources.
2021-08-24 11:00:19.350  INFO 26950 --- [           main] c.n.c.sources.URLConfigurationSource     : To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath.
2021-08-24 11:00:19.354  WARN 26950 --- [           main] c.n.c.sources.URLConfigurationSource     : No URLs will be polled as dynamic configuration sources.
2021-08-24 11:00:19.354  INFO 26950 --- [           main] c.n.c.sources.URLConfigurationSource     : To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath.
2021-08-24 11:00:19.632  INFO 26950 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2021-08-24 11:00:19.889  INFO 26950 --- [           main] o.s.s.c.ThreadPoolTaskScheduler          : Initializing ExecutorService 'Nacos-Watch-Task-Scheduler'
2021-08-24 11:00:20.335  WARN 26950 --- [           main] o.s.b.a.f.FreeMarkerAutoConfiguration    : Cannot find template location(s): [classpath:/templates/] (please add some templates, check your FreeMarker configuration, or set spring.freemarker.checkTemplateLocation=false)
2021-08-24 11:00:20.815  INFO 26950 --- [           main] com.alibaba.nacos.client.naming          : initializer namespace from System Property :null
2021-08-24 11:00:20.816  INFO 26950 --- [           main] com.alibaba.nacos.client.naming          : initializer namespace from System Environment :null
2021-08-24 11:00:20.816  INFO 26950 --- [           main] com.alibaba.nacos.client.naming          : initializer namespace from System Property :null
2021-08-24 11:00:25.923  INFO 26950 --- [           main] d.s.w.p.DocumentationPluginsBootstrapper : Context refreshed
2021-08-24 11:00:25.940  INFO 26950 --- [           main] d.s.w.p.DocumentationPluginsBootstrapper : Found 1 custom documentation plugin(s)
2021-08-24 11:00:26.098  INFO 26950 --- [           main] s.d.s.w.s.ApiListingReferenceScanner     : Scanning for api listing references
2021-08-24 11:00:26.225  INFO 26950 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8081 (http) with context path ''
2021-08-24 11:00:26.227  INFO 26950 --- [           main] com.alibaba.nacos.client.naming          : [BEAT] adding beat: BeatInfo{port=8081, ip='192.168.31.23', weight=1.0, serviceName='study-test@@study-admin', cluster='DEFAULT', metadata={preserved.register.source=SPRING_CLOUD}, scheduled=false, period=5000, stopped=false} to beat map.
2021-08-24 11:00:26.228  INFO 26950 --- [           main] com.alibaba.nacos.client.naming          : [REGISTER-SERVICE] 932a9da5-fdd6-4747-bc13-a3e97b089281 registering service study-test@@study-admin with instance: Instance{instanceId='null', ip='192.168.31.23', port=8081, weight=1.0, healthy=true, enabled=true, ephemeral=true, clusterName='DEFAULT', serviceName='null', metadata={preserved.register.source=SPRING_CLOUD}}
2021-08-24 11:00:26.235  INFO 26950 --- [           main] c.a.c.n.registry.NacosServiceRegistry    : nacos registry, study-test study-admin 192.168.31.23:8081 register finished
2021-08-24 11:00:26.240  INFO 26950 --- [           main] com.xzll.test.StudyTestApplication       : Started StudyTestApplication in 41.351 seconds (JVM running for 46.824)
-----------------------[ApplicationRunnerPoint]  扩展点演示 # run  开始--------------------------------------
[ApplicationRunnerPoint] # run ; 时机：此时已经刷新容器处于run方法的后半部分了 接下来run方法将发布running事件
-----------------------[ApplicationRunnerPoint]  扩展点演示 # run  结束--------------------------------------

-----------------------[CommandLineRunnerPoint]  扩展点演示 # run  开始--------------------------------------
[CommandLineRunnerPoint] # run ; 时机：此时已经刷新容器处于run方法的后半部分了 接下来run方法将发布running事件
-----------------------[CommandLineRunnerPoint]  扩展点演示 # run  结束--------------------------------------

2021-08-24 11:00:26.245  INFO 26950 --- [           main] c.a.n.client.config.impl.ClientWorker    : [fixed-127.0.0.1_8848-f407f750-961e-44f2-80d7-6983374ad1e0] [subscribe] study-admin-dev+study-admin+f407f750-961e-44f2-80d7-6983374ad1e0
2021-08-24 11:00:26.246  INFO 26950 --- [           main] c.a.nacos.client.config.impl.CacheData   : [fixed-127.0.0.1_8848-f407f750-961e-44f2-80d7-6983374ad1e0] [add-listener] ok, tenant=f407f750-961e-44f2-80d7-6983374ad1e0, dataId=study-admin-dev, group=study-admin, cnt=1
2021-08-24 11:00:26.246  INFO 26950 --- [           main] c.a.n.client.config.impl.ClientWorker    : [fixed-127.0.0.1_8848-f407f750-961e-44f2-80d7-6983374ad1e0] [subscribe] study-admin-dev.properties+study-admin+f407f750-961e-44f2-80d7-6983374ad1e0
2021-08-24 11:00:26.246  INFO 26950 --- [           main] c.a.nacos.client.config.impl.CacheData   : [fixed-127.0.0.1_8848-f407f750-961e-44f2-80d7-6983374ad1e0] [add-listener] ok, tenant=f407f750-961e-44f2-80d7-6983374ad1e0, dataId=study-admin-dev.properties, group=study-admin, cnt=1
2021-08-24 11:00:26.246  INFO 26950 --- [           main] c.a.n.client.config.impl.ClientWorker    : [fixed-127.0.0.1_8848-f407f750-961e-44f2-80d7-6983374ad1e0] [subscribe] study-admin-dev-dev.properties+study-admin+f407f750-961e-44f2-80d7-6983374ad1e0
2021-08-24 11:00:26.246  INFO 26950 --- [           main] c.a.nacos.client.config.impl.CacheData   : [fixed-127.0.0.1_8848-f407f750-961e-44f2-80d7-6983374ad1e0] [add-listener] ok, tenant=f407f750-961e-44f2-80d7-6983374ad1e0, dataId=study-admin-dev-dev.properties, group=study-admin, cnt=1
2021-08-24 11:00:26.445  INFO 26950 --- [g.push.receiver] com.alibaba.nacos.client.naming          : received push data: {"type":"dom","data":"{\"name\":\"study-test@@study-admin\",\"clusters\":\"DEFAULT\",\"cacheMillis\":10000,\"hosts\":[{\"instanceId\":\"192.168.31.23#8081#DEFAULT#study-test@@study-admin\",\"ip\":\"192.168.31.23\",\"port\":8081,\"weight\":1.0,\"healthy\":true,\"enabled\":true,\"ephemeral\":true,\"clusterName\":\"DEFAULT\",\"serviceName\":\"study-test@@study-admin\",\"metadata\":{\"preserved.register.source\":\"SPRING_CLOUD\"},\"instanceHeartBeatInterval\":5000,\"ipDeleteTimeout\":30000,\"instanceHeartBeatTimeOut\":15000}],\"lastRefTime\":1629774026443,\"checksum\":\"\",\"allIPs\":false,\"reachProtectionThreshold\":false,\"valid\":true}","lastRefTime":369116050320926} from /192.168.31.23
2021-08-24 11:00:26.459  INFO 26950 --- [g.push.receiver] com.alibaba.nacos.client.naming          : new ips(1) service: study-test@@study-admin@@DEFAULT -> [{"instanceId":"192.168.31.23#8081#DEFAULT#study-test@@study-admin","ip":"192.168.31.23","port":8081,"weight":1.0,"healthy":true,"enabled":true,"ephemeral":true,"clusterName":"DEFAULT","serviceName":"study-test@@study-admin","metadata":{"preserved.register.source":"SPRING_CLOUD"},"instanceHeartBeatInterval":5000,"instanceHeartBeatTimeOut":15000,"ipDeleteTimeout":30000}]
2021-08-24 11:00:26.466  INFO 26950 --- [g.push.receiver] com.alibaba.nacos.client.naming          : current ips:(1) service: study-test@@study-admin@@DEFAULT -> [{"instanceId":"192.168.31.23#8081#DEFAULT#study-test@@study-admin","ip":"192.168.31.23","port":8081,"weight":1.0,"healthy":true,"enabled":true,"ephemeral":true,"clusterName":"DEFAULT","serviceName":"study-test@@study-admin","metadata":{"preserved.register.source":"SPRING_CLOUD"},"instanceHeartBeatInterval":5000,"instanceHeartBeatTimeOut":15000,"ipDeleteTimeout":30000}]

本文完~~~

聊聊SpringBoot中10个扩展点的定义以及执行时机