Spring Boot AOP无法获取注释参数

使用Spring Boot v2.2.4

对于我的自定义AOP注释，我希望获得给定给带注释方法注释的值。但我不能这样做

我希望能够应用一些安全注释，根据方法允许的限制和访问用户拥有的权限限制用户对方法的访问。我认为AOP是我最好的

另外，由于我预计这种方法会被大量使用，所以我不希望使用基于反射的解决方案。我知道我们可以从连接点获得方法签名，并从那里访问注释值。但我听说在生产环境中强烈反对基于反射的解决方案

注释

package com.example.demo；
导入java.lang.annotation.ElementType；
导入java.lang.annotation.Retention；
导入java.lang.annotation.RetentionPolicy；
导入java.lang.annotation.Target；
@目标（ElementType.METHOD）
@保留（RetentionPolicy.RUNTIME）
公共@interface MyAnno{
公共字符串权限（）默认为“”；
}

面貌

package com.example.demo；
导入java.lang.reflect.Method；
导入org.aspectj.lang.JoinPoint；
导入org.aspectj.lang.ProceedingJoinPoint；
导入org.aspectj.lang.annotation.Around；
导入org.aspectj.lang.annotation.Aspect；
导入org.aspectj.lang.annotation.Before；
导入org.aspectj.lang.annotation.Pointcut；
导入org.aspectj.lang.reflect.MethodSignature；
导入org.springframework.stereotype.Component；
@面貌
@组件（value=“aspectO”）
公共类方面{
@切入点（“执行（公共**（…）”）
public void anyPublic（）{}
@切入点（“@annotation（com.example.demo.MyAnno）”）
public void myAnnotation（）{}
@在（“myAnnotation（）”）之前
立即公开（JoinPoint jp，MyAnno MyAnno）{
System.out.println（“允许的权限为：“+myAnno.permission”）；
}
}

主类

package com.example.demo；
导入org.springframework.boot.SpringApplication；
导入org.springframework.boot.autoconfigure.springboot应用程序；
导入org.springframework.context.ApplicationContext；
导入org.springframework.stereotype.Component；
@SpringBoot应用程序
公共类演示应用程序{
公共静态void main（字符串[]args）{
ApplicationContext appCon=SpringApplication.run（DemoApplication.class，args）；
InnerDemoApplication obj=appCon.getBean（InnerDemoApplication.class）；
System.out.println（“Howdy”）；
obj.name（）；
System.out.println（appCon.containsBean（“aspectO”）；
}
/**
*InnerDemoApplication
*/
@组件（value=“inDemo”）
公共类应用程序{
@MyAnno（permissions=“stuff”）
公共无效名称（）{
System.out.println（“内部某些方法”）；
}       
}
}

错误

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.2.4.RELEASE)

2020-02-10 00:32:37.304  INFO 22236 --- [           main] com.example.demo.DemoApplication         : Starting DemoApplication on kloudone-pc with PID 22236 (/media/data_drive/data/misc/aoptest2/demo/target/classes started by kloudone in /media/data_drive/data/misc/aoptest2/demo)
2020-02-10 00:32:37.307  INFO 22236 --- [           main] com.example.demo.DemoApplication         : No active profile set, falling back to default profiles: default
2020-02-10 00:32:37.936  WARN 22236 --- [           main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'demoApplication': Initialization of bean failed; nested exception is java.lang.IllegalArgumentException: error at ::0 formal unbound in pointcut
2020-02-10 00:32:37.945  INFO 22236 --- [           main] ConditionEvaluationReportLoggingListener :

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-02-10 00:32:37.950 ERROR 22236 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'demoApplication': Initialization of bean failed; nested exception is java.lang.IllegalArgumentException: error at ::0 formal unbound in pointcut
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:603) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878) ~[spring-context-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
    at com.example.demo.DemoApplication.main(DemoApplication.java:12) [classes/:na]
Caused by: java.lang.IllegalArgumentException: error at ::0 formal unbound in pointcut
    at org.aspectj.weaver.tools.PointcutParser.parsePointcutExpression(PointcutParser.java:319) ~[aspectjweaver-1.9.5.jar:na]
    at org.springframework.aop.aspectj.AspectJExpressionPointcut.buildPointcutExpression(AspectJExpressionPointcut.java:227) ~[spring-aop-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.aop.aspectj.AspectJExpressionPointcut.obtainPointcutExpression(AspectJExpressionPointcut.java:198) ~[spring-aop-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.aop.aspectj.AspectJExpressionPointcut.getClassFilter(AspectJExpressionPointcut.java:177) ~[spring-aop-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.aop.support.AopUtils.canApply(AopUtils.java:226) ~[spring-aop-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.aop.support.AopUtils.canApply(AopUtils.java:289) ~[spring-aop-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.aop.support.AopUtils.findAdvisorsThatCanApply(AopUtils.java:321) ~[spring-aop-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findAdvisorsThatCanApply(AbstractAdvisorAutoProxyCreator.java:126) ~[spring-aop-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findEligibleAdvisors(AbstractAdvisorAutoProxyCreator.java:95) ~[spring-aop-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.getAdvicesAndAdvisorsForBean(AbstractAdvisorAutoProxyCreator.java:76) ~[spring-aop-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.wrapIfNecessary(AbstractAutoProxyCreator.java:347) ~[spring-aop-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java:299) ~[spring-aop-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:431) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    ... 14 common frames omitted

---

在

reactNow（…）

中有一个通知参数

MyAnno MyAnno

，它不会出现在切入点中。您需要像这样更改代码（未经测试，只需快速键入）：

@Pointcut（“@annotation（myAnno）”）
公共void myAnnotation（MyAnno MyAnno）{}
@之前（“myAnnotation（myAnno）”）
立即公开（JoinPoint jp，MyAnno MyAnno）{
System.out.println（“允许的权限为：“+myAnno.permission”）；
}

或者，如果您不在其他任何地方重复使用切入点，则只需内联：

前（“@注释（myAnno）”） 立即公开（JoinPoint jp，MyAnno MyAnno）{ System.out.println（“允许的权限为：“+myAnno.permission”）； }