Spring AOP在Bean生命周期中的调用时机

最新推荐文章于 2025-06-10 20:12:08 发布

ttjxtjx

最新推荐文章于 2025-06-10 20:12:08 发布

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分类专栏： Spring 文章标签： spring aop

本文链接：https://blog.youkuaiyun.com/ttjxtjx/article/details/49868305

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本文探讨了如何使用AOP技术在Spring框架下实现对Bean生命周期方法的增强，通过实例展示了AOP在Bean初始化、配置和销毁过程中的作用。

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之前有写了一个生命周期的例子，直接拿来用，在每个生命周期方法中调用print方法。见上一篇

加上AOP的代码

package com.aspect;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;

@Aspect
@Component
public class AroundAspect {

	@Around("execution(* com.bean.MyMode.*(..))")
	public Object doBasicProfiling(ProceedingJoinPoint pjp) throws Throwable {
		String methodName = pjp.getSignature().getName();
		System.out.println("----Aspect before " + methodName + " called ");
		Object retVal = pjp.proceed();
		System.out.println("----Aspect after " + methodName + " called ");
		return retVal;
	}


}

运行得到结果：

InstantiationBeanPostProcessor postProcessBeforeInstantiation called

MyMode constructor call
1
MyMode constructor finish

InstantiationBeanPostProcessor postProcessAfterInstantiation called

InstantiationBeanPostProcessor postProcessPropertyValues called

BeanPostProcessor postProcessBeforeInitialization called
1
BeanPostProcessor postProcessBeforeInitialization finish

Mode @PostConstruct anno init called
1
MyMode @PostConstruct anno init finish

Mode afterPropertiesSet called
1
MyMode afterPropertiesSet finish

Mode @Bean anno Init called
1
MyMode @Bean anno Initfinish

BeanPostProcessor postProcessAfterInitialization called
----Aspect before print called
1
----Aspect after print called
BeanPostProcessor postProcessAfterInitialization finish

----Aspect before print called
1
----Aspect after print called

Mode @PreDestroy anno destory called
1
MyMode @PostConstruct anno destory finish

Mode destroy called
1
MyMode destroy finish

Mode @Bean anno destory called
1
MyMode @Bean anno destory finish

结论是：在Bean的整个生命周期中，只有在初始化方法调用完之后销毁之前，AOP是有效的。