對于自定義注解這里就不嘮叨了,百度一大堆,這里有我一個自定義注解
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@Retention (RetentionPolicy.RUNTIME) @Target ({ ElementType.METHOD }) public @interface MsgEvent { RetailOrderEvent msgEvent(); } |
注解實現類
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@Component public class MsgEventProcessor implements BeanPostProcessor { /** * 事件消息注解與實例Bean的映射對象 */ public static Map<String, ServiceBean> EVENTCODESERVICEBEANMAP = new HashMap<String, ServiceBean>(); @Override public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException { return bean; } @Override public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException { Method[] methods = ReflectionUtils.getAllDeclaredMethods(bean.getClass()); if (methods != null ) { for (Method method : methods) { MsgEvent myMsgEvent = AnnotationUtils.findAnnotation(method, MsgEvent. class ); if (myMsgEvent != null ) { String eventCode = myMsgEvent.msgEvent().eventCode(); ServiceBean servieBean = new ServiceBean(); servieBean.setServiceBeanObj(bean); servieBean.setServiceMethod(method); Class<?> argsCls = method.getParameterTypes()[ 0 ]; servieBean.setArgsCls(argsCls); EVENTCODESERVICEBEANMAP.put(eventCode, servieBean); } } } return bean; } } |
調用者
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@MsgEvent (msgEvent = RetailOrderEvent.PLACE_GENERALRETAILORDER) public Person getPerson(Person p) { return personMapper.getPerson(p.getId()); } |
spring boot debug模式下啟動一直不會再代碼紅色部分停下,說明沒有獲取到自定義注解
原因是發現bean為jdk代理
解決辦法
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@SpringBootApplication @EnableAspectJAutoProxy (exposeProxy = true ) public class Application { public static void main(String[] args) { SpringApplication.run(Application. class , args); } } |
或者
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@ImportResource (locations = { "classpath:spring-basic.xml" }) @SpringBootApplication //@EnableAspectJAutoProxy(exposeProxy = true) public class Application { public static void main(String[] args) { SpringApplication.run(Application. class , args); } } |
spring-basic.xml
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<? xml version = "1.0" encoding = "UTF-8" ?> < beans xmlns = "http://www.springframework.org/schema/beans" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xmlns:context = "http://www.springframework.org/schema/context" xmlns:aop = "http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd "> <!-- 配置使Spring采用CGLIB代理 --> < aop:aspectj-autoproxy expose-proxy = "true" proxy-target-class = "true" /> </ beans > |
上述會讓所有的都采用CGLIB代理,如果只想對使用的類采用,其他的還是原來的話就可以對注解使用類上標注@Configuration代替@Component
補充知識:解決Aspect注解基于注解的增強不生效的問題
Aspect基于注解的增強生效須滿足3個條件:
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<!-- 1 .代理方式設置為 cglib,默認 false ,則必須通過實現某個接口才能實現增強 --> <aop:aspectj-autoproxy proxy-target- class = "true" /> <!-- 2 .配置文件中把須增強注解所在包掃描注入,或者配置 bean--> <context:component-scan base- package = "注解所在包路徑" /> <!-- 3 .配置文件中把 @Aspect 注解所在類對應包掃描注入 或者配置bean--> <context:component-scan base- package = "aspect注解所在包路徑" /> |
ps : 若在 controller 層使用,則controller 也需要配置上邊兩個條件方能生效
以上這篇解決spring boot啟動掃描不到自定義注解的問題就是小編分享給大家的全部內容了,希望能給大家一個參考,也希望大家多多支持服務器之家。
原文鏈接:https://blog.csdn.net/wDong0613/article/details/79910768