Spring注解开发生命周期原理解析

public class Car {
  public Car() {
    System.out.println("car constructor");
  }

  public void init(){
    System.out.println("car init");
  }

  public void destroy(){
    System.out.println("car destroy");
  }
}

@Configuration
public class MyCOnfigOfLifeCycle {

  @Bean(initMethod = "init",destroyMethod = "destroy")
  public Car car(){
    return new Car();
  }
}

  @Test
  public void test01(){
    printBeans(applicationContext);

    // 关闭容器
    applicationContext.close();
  }

  private void printBeans(AnnotationConfigApplicationContext applicationContext){
    String[] beanDefinitionNames = applicationContext.getBeanDefinitionNames();
    for (String beanDefinitionName : beanDefinitionNames) {
      System.out.println(beanDefinitionName);
    }
  }

public class Cat implements InitializingBean, DisposableBean {
  @Override
  public void destroy() throws Exception {
    System.out.println("cat destroy");
  }

  @Override
  public void afterPropertiesSet() throws Exception {
    System.out.println("cat initialize");
  }
}

public class Dog {
  public Dog(){
    System.out.println("dog constructor");
  }

  @PostConstruct
  public void init(){
    System.out.println("dog init");
  }

  @PreDestroy
  public void destroy(){
    System.out.println("dog destroy");
  }
}

public class MyBeanPostProcessor implements BeanPostProcessor {


  @Override
  public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
    System.out.println("before init" + beanName);
    return bean;
  }

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

    for(Iterator var4 = this.getBeanPostProcessors().iterator(); var4.hasNext(); result = current) {
      BeanPostProcessor processor = (BeanPostProcessor)var4.next();
      current = processor.postProcessBeforeInitialization(result, beanName);
      if (current == null) {
        return result;
      }
    }