spring bean生命周期(包含spring常用接口的载入)

spring bean生命周期流程图：

其中包含了很多常用的接口，可以参考spring 常用接口；

下面写个例子证明下：

1.实现InitializingBean以及各个Aware接口

public class UserB implements InitializingBean , BeanFactoryAware , BeanNameAware, BeanClassLoaderAware , ApplicationContextAware, EnvironmentAware, ResourceLoaderAware, MessageSourceAware {
    private String name;
    private int age;
    private UserA usera;

    @Autowired
    public void setUsera(UserA usera) {
        this.usera = usera;
        System.out.println("====UserB属性注入usera"+usera);
    }

    public UserB() {
        System.out.println("====构造userB");
    }

    public String getName() {
        return "程序猿";
    }
    public int getAge() {
        return 19;
    }
    public void function(){
        System.out.println("====userB"+usera.getName());
    }
    @Override
    public String toString() {
        return "UserB{" +
                "name='" + getName() + '\'' +
                ", age=" + getAge() +
                ", usera=" + usera +
                '}';
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        System.out.println("UserB===InitializingBean-afterPropertiesSet");
    }

    @Override
    public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
        System.out.println("=====UserB:setBeanFactory");
    }

    @Override
    public void setBeanClassLoader(ClassLoader classLoader) {
        System.out.println("=====UserB:setBeanClassLoader");
    }

    @Override
    public void setBeanName(String name) {
        System.out.println("=====UserB:setBeanName");
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        System.out.println("=====UserB:setApplicationContext");
    }

    @Override
    public void setEnvironment(Environment environment) {
        System.out.println("=====UserB:setEnvironment");
    }

    @Override
    public void setMessageSource(MessageSource messageSource) {
        System.out.println("=====UserB:setMessageSource");
    }

    @Override
    public void setResourceLoader(ResourceLoader resourceLoader) {
        System.out.println("=====UserB:setResourceLoader");
    }
}

2.实现BeanPostProcessor, BeanFactoryPostProcessor , InstantiationAwareBeanPostProcessor

@Component
public class UserPostProcessor implements BeanPostProcessor, BeanFactoryPostProcessor , BeanFactoryAware , InstantiationAwareBeanPostProcessor {


    BeanFactory beanFactory;
    @Override
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        if(beanName.contains("UserB")) {
            Object bean1 = beanFactory.getBean(UserB.class.getName());
            System.out.println("====BeanPostProcessor-postProcessBeforeInitialization:"+bean1);
        }
        return null;
    }

    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
        if(beanName.contains("UserB")) {
            Object bean1 = beanFactory.getBean(UserB.class.getName());
            System.out.println("====BeanPostProcessor-postProcessAfterInitialization:"+bean1);
        }
        return null;
    }

    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
        BeanDefinition beanDefinition = beanFactory.getBeanDefinition(UserB.class.getName());
        System.out.println("=====BeanFactoryPostProcessor-postProcessBeanFactory:"+beanDefinition);
    }

    @Override
    public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
        this.beanFactory = beanFactory;
    }

    @Override
    public Object postProcessBeforeInstantiation(Class<?> beanClass, String beanName) throws BeansException {
        if(beanName.contains("UserB")) {
            System.out.println("=====InstantiationAwareBeanPostProcessor-postProcessBeforeInstantiation:" + beanName);
        }
        return null;
    }

    @Override
    public boolean postProcessAfterInstantiation(Object bean, String beanName) throws BeansException {
        if(beanName.contains("UserB")) {
            Object bean1 = beanFactory.getBean(UserB.class.getName());
            System.out.println("=====InstantiationAwareBeanPostProcessor-postProcessAfterInstantiation" + bean1);
        }
        return true;
    }

    @Override
    public PropertyValues postProcessProperties(PropertyValues pvs, Object bean, String beanName) throws BeansException {
        if(beanName.contains("UserB")) {
            Object bean1 = beanFactory.getBean(UserB.class.getName());
            System.out.println("=====InstantiationAwareBeanPostProcessor-postProcessProperties:" + bean1);
        }
        return null;
    }
}

3.启动类;

@SpringBootApplication
@Import({UserB.class,UserA.class})
public class DemoApplication {
	public static void main(String[] args) {
		ConfigurableApplicationContext run = SpringApplication.run(DemoApplication.class, args);

	}
}

4.运行结果：