[SpringMVC] InstantiationAwareBeanPostProcessor

InstantiationAwareBeanPostProcessor 继承自 BeanPostProcessor 是 Spring 非常重要的拓展接口，监听 Bean 的一段生命周期：实例化(Instantiation)

指定 Bean 初始化方法（方式：注解）：创建后执行这些操作

@Component
public class Color {
    @PostConstruct
    public void init(){
        System.out.println("车生产后的时候，测试一下");
    }
}

指定 Bean 初始化方法（方式：指定）：创建后执行这些操作

@Configuration
class Config {
    @Bean(name = "color", initMethod = "init")
    public  Color getColor(){
        return new Color();
    }
}

public interface InstantiationAwareBeanPostProcessor extends BeanPostProcessor {
    // 在目标对象实例化之前调用
    Object postProcessBeforeInstantiation(Class beanClass, String beanName) throws BeansException;
    // 在目标对象实例化之后调用
    boolean postProcessAfterInstantiation(Object bean, String beanName) throws BeansException;
    // 对属性值进行修改
    PropertyValues postProcessPropertyValues(PropertyValues pvs, PropertyDescriptor[] pds, Object bean, String beanName) throws BeansException;
}

public interface BeanPostProcessor {
    //bean初始化方法调用前被调用
    Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException;
    //bean初始化方法调用后被调用
    Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException;
}

https://blog.csdn.net/qq_38526573/article/details/88091702