Spring的AOP常见错误

日期：2020-06-07 栏目：程序人生浏览：次

在学习AOP的时候，遇到错误是在所难免的，当在google中搜索这些错误的时候，发现很多人都是没有仔细推敲，只是人云亦云。这里把遇到的一些错误总结下来，以便以后查阅。

1. 切入点表达式定义错误

[1] 错误详细信息如下，红色标注是错误的关键点。

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'IStudentMgr' defined in class path resource [applicationContext.xml]: Initialization of bean failed; nested exception is Java.lang.IllegalArgumentException: error at ::0 can't find referenced pointcut update

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)

at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:293)

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:290)

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:192)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)

at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)

at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)

at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)

[2] 解决办法

这个错误的意思是说切入点定义的语法发生错误，错误的定义如下：

@AfterReturning("com.trs.components.mgr.StudentMgr.update()")

正确的定义代码如下：

@AfterReturning("execution(* com.trs.components.mgr.StudentMgr.update(..))")

2. 切入点参数定义错误

[1] 错误详细信息如下，红色标注是错误的关键点

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'IStudentMgr' defined in class path resource [applicationContext.xml]: Initialization of bean failed; nested exception is java.lang.IllegalArgumentException: error at ::0 formal unbound in pointcut