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
1
2
3
4
5
|
@Retention (RetentionPolicy.RUNTIME) @Target ({ ElementType.METHOD }) public @interface MsgEvent { RetailOrderEvent msgEvent(); } |
注解实现类
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
@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
1
2
3
4
|
@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
1
2
3
4
5
6
7
8
|
@SpringBootApplication @EnableAspectJAutoProxy (exposeProxy = true ) public class Application { public static void main(String[] args) { SpringApplication.run(Application. class , args); } } |
或者
1
2
3
4
5
6
7
8
9
|
@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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
<? 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
2
3
4
5
6
|
<!-- 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
以上这篇解决spring boot启动扫描不到自定义注解的问题就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/wDong0613/article/details/79910768