利用AOP实现自定义注解

文章目录

添加依赖配置切面帮你跳坑怎么使用自定义注解？效果 作者：曹亮 今天我们就来讲讲切点的另一种配置方式：@annotation，通过@annotation配置切点，我们可以灵活的控制切到哪个方法，同时可以进行一些个性化的设置，今天我们就用它来实现一个记录所有接口请求功能吧。

添加依赖

新建一个Spring Boot项目，打开pom.xml文件添加相关Maven依赖

<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-aop</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> /** * @author duxiu * @create 2020-05-26 3:37 下午 * @Retention(RetentionPolicy.RUNTIME)//定义注解生命周期 @Target(ElementType.METHOD)//定义注解作用域 @Documented//表明这个注解能被javadoc记录 public @interface EagleEye { /** * 接口描述 * @return */ String desc() default ""; }

配置切面

import com.esotericsoftware.minlog.Log; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.Signature; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Pointcut; import org.aspectj.lang.reflect.MethodSignature; import org.springframework.stereotype.Component; import org.springframework.web.context.request.RequestAttributes; import org.springframework.web.context.request.RequestContextHolder; import org.springframework.web.context.request.ServletRequestAttributes; import javax.servlet.http.HttpServletRequest; import java.lang.reflect.Method; /** * @author duxiu * @create 2020-05-26 3:44 下午 */ @Aspect @Component("logAspect") public class EagleEyeAspect { // 配置织入点 @Pointcut("@annotation(com.runlion.wl.admin.common.EagleEye)") public void eagleEyeAspect() { } // 具体增强 @Around("eagleEye()") public Object around(ProceedingJoinPoint joinPoint) throws Throwable { long beforeLong = System.currentTimeMillis(); ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes(); HttpServletRequest request = servletRequestAttributes.getRequest(); Signature signature = joinPoint.getSignature(); MethodSignature methodSignature = (MethodSignature) signature; Method method = methodSignature.getMethod(); EagleEye annotation = method.getAnnotation(EagleEye.class); String desc = annotation.desc(); Log.info("方法增强前"); // 原来的方法 Object result = joinPoint.proceed(); Log.info("方法增强后"); long afterLong = System.currentTimeMillis(); Log.info("方法耗时" + (afterLong - beforeLong)); return result; } }

帮你跳坑

启动报错了

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'feignConfigBeanPostProcessor' defined in file [/Users/caoliang/Project/WL/wl-common/common-core/target/classes/com/runlion/wl/common/space/FeignConfigBeanPostProcessor.class]: BeanPostProcessor before instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration': Initialization of bean failed; nested exception is java.lang.IllegalArgumentException: error at ::0 can't find referenced pointcut eagleEye at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:477) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:312) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:308) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) at org.springframework.context.support.PostProcessorRegistrationDelegate.registerBeanPostProcessors(PostProcessorRegistrationDelegate.java:237) at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:703) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:528) at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) at com.runlion.wl.admin.AdminWebApplication.main(AdminWebApplication.java:36) Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration': Initialization of bean failed; nested exception is java.lang.IllegalArgumentException: error at ::0 can't find referenced pointcut eagleEye at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:562) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:481) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:312) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:308) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:372) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1178) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1072) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:511) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:481) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:312) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:308) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) at org.springframework.aop.framework.autoproxy.BeanFactoryAdvisorRetrievalHelper.findAdvisorBeans(BeanFactoryAdvisorRetrievalHelper.java:89) at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findCandidateAdvisors(AbstractAdvisorAutoProxyCreator.java:102) at org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator.findCandidateAdvisors(AnnotationAwareAspectJAutoProxyCreator.java:88) at org.springframework.aop.aspectj.autoproxy.AspectJAwareAdvisorAutoProxyCreator.shouldSkip(AspectJAwareAdvisorAutoProxyCreator.java:103) at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessBeforeInstantiation(AbstractAutoProxyCreator.java:248) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInstantiation(AbstractAutowireCapableBeanFactory.java:1042) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.resolveBeforeInstantiation(AbstractAutowireCapableBeanFactory.java:1016) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:471) ... 14 common frames omitted Caused by: java.lang.IllegalArgumentException: error at ::0 can't find referenced pointcut eagleEye at org.aspectj.weaver.tools.PointcutParser.parsePointcutExpression(PointcutParser.java:319) at org.springframework.aop.aspectj.AspectJExpressionPointcut.buildPointcutExpression(AspectJExpressionPointcut.java:217) at org.springframework.aop.aspectj.AspectJExpressionPointcut.checkReadyToMatch(AspectJExpressionPointcut.java:190) at org.springframework.aop.aspectj.AspectJExpressionPointcut.getClassFilter(AspectJExpressionPointcut.java:169) at org.springframework.aop.support.AopUtils.canApply(AopUtils.java:220) at org.springframework.aop.support.AopUtils.canApply(AopUtils.java:279) at org.springframework.aop.support.AopUtils.findAdvisorsThatCanApply(AopUtils.java:311) at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findAdvisorsThatCanApply(AbstractAdvisorAutoProxyCreator.java:119) at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findEligibleAdvisors(AbstractAdvisorAutoProxyCreator.java:89) at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.getAdvicesAndAdvisorsForBean(AbstractAdvisorAutoProxyCreator.java:70) at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.wrapIfNecessary(AbstractAutoProxyCreator.java:346) at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java:298) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:421) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1635) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) ... 36 common frames omitted

这里报错了差不多就2种情况

这里启动报错了

这里报错了差不多就2种情况 1-拼写错误 这里名字一样要对应上 2-jar包过低

这我是直接用了最新的 org.aspectj aspectjweaver 1.9.0

就用以上方法解决就完事了

反正error at ::0 can’t find referenced pointcut XXX

怎么使用自定义注解？

/** * @author duxiu * @create 2020-05-16 9:39 上午 */ @RestController public class BigScreenApiImpl implements BigScreenApi{ @Autowired private BigScreenService bigScreenService; @Override @GetMapping("/admin/api/findBigScreenByUser") @EagleEye(desc = "aop简单实现") public BigScreenVO findBigScreenByUser() { return bigScreenService.findBigScreenByUser(); } @Override @GetMapping("/admin/api/findBigScreenByBill") @EagleEye(desc = "aop简单实现") public BigScreenVO findBigScreenByBill() { return bigScreenService.findBigScreenByBill(); } @Override @GetMapping("/admin/api/findBigScreenByFinance") @EagleEye(desc = "aop简单实现") public BigScreenVO findBigScreenByFinance() { return bigScreenService.findBigScreenByFinance(); } }

在方法上加上@EagleEye注解

2.通过desc元素设置方法的描述

对于需要AOP增强的方法，我们只需要：

1.在方法上加上@EagleEye注解

2.通过desc元素设置方法的描述

效果