解决spring boot启动扫描不到自定义注解的问题
对于自定义注解这里就不唠叨了,百度一大堆,这里有我一个自定义注解
@Retention(RetentionPolicy.RUNTIME) @Target({ ElementType.METHOD }) public @interface MsgEvent { RetailOrderEvent msgEvent(); }
注解实现类
@Component public class MsgEventProcessor implements BeanPostProcessor { /** * 事件消息注解与实例Bean的映射对象 */ 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; } }
调用者
@MsgEvent(msgEvent = RetailOrderEvent.PLACE_GENERALRETAILORDER) public Person getPerson(Person p) { return personMapper.getPerson(p.getId()); }
spring boot debug模式下启动一直不会再代码红色部分停下,说明没有获取到自定义注解
原因是发现bean为jdk代理
解决办法
@SpringBootApplication @EnableAspectJAutoProxy(exposeProxy = true) public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } }
或者
@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
<?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>
上述会让所有的都采用CGLIB代理,如果只想对使用的类采用,其他的还是原来的话就可以对注解使用类上标注@Configuration代替@Component
补充知识:解决Aspect注解基于注解的增强不生效的问题
Aspect基于注解的增强生效须满足3个条件:
<!--1.代理方式设置为 cglib,默认false,则必须通过实现某个接口才能实现增强 --> <aop:aspectj-autoproxy proxy-target-class="true"/> <!--2.配置文件中把须增强注解所在包扫描注入,或者配置 bean--> <context:component-scan base-package="注解所在包路径"/> <!--3.配置文件中把@Aspect注解所在类对应包扫描注入 或者配置bean--> <context:component-scan base-package="aspect注解所在包路径"/>
ps : 若在 controller 层使用,则controller 也需要配置上边两个条件方能生效
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