I am very new to the Spring AOP. I've developed below code, just to run Circles getName method before LoggingAspect. Also I wanted all xml beans to be written into Annotations how we can do that? How to resolved below error?
我是Spring AOP的新手。我开发了下面的代码,只是为了在LoggingAspect之前运行Circles getName方法。此外,我希望所有xml bean都写入Annotations我们如何做到这一点?如何解决以下错误?
I think I've provided sufficient information. Any quick help from experts?
我想我已经提供了足够的信息。有专家的快速帮助吗?
Here is the my project structure:
这是我的项目结构:
The error I am getting:
我得到的错误:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'triangle' defined in class path resource [spring.xml]: BeanPostProcessor before instantiation of bean failed; nested exception is java.lang.NoClassDefFoundError: org/aspectj/weaver/reflect/ReflectionWorld$ReflectionWorldException
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:472)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:755)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at com.spring.aop.AOPMain.main(AOPMain.java:10)
Caused by: java.lang.NoClassDefFoundError: org/aspectj/weaver/reflect/ReflectionWorld$ReflectionWorldException
at org.springframework.aop.aspectj.annotation.ReflectiveAspectJAdvisorFactory.getPointcut(ReflectiveAspectJAdvisorFactory.java:192)
at org.springframework.aop.aspectj.annotation.ReflectiveAspectJAdvisorFactory.getAdvisor(ReflectiveAspectJAdvisorFactory.java:178)
at org.springframework.aop.aspectj.annotation.ReflectiveAspectJAdvisorFactory.getAdvisors(ReflectiveAspectJAdvisorFactory.java:108)
at org.springframework.aop.aspectj.annotation.BeanFactoryAspectJAdvisorsBuilder.buildAspectJAdvisors(BeanFactoryAspectJAdvisorsBuilder.java:109)
at org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator.findCandidateAdvisors(AnnotationAwareAspectJAutoProxyCreator.java:87)
at org.springframework.aop.aspectj.autoproxy.AspectJAwareAdvisorAutoProxyCreator.shouldSkip(AspectJAwareAdvisorAutoProxyCreator.java:103)
at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessBeforeInstantiation(AbstractAutoProxyCreator.java:243)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInstantiation(AbstractAutowireCapableBeanFactory.java:984)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.resolveBeforeInstantiation(AbstractAutowireCapableBeanFactory.java:955)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:466)
... 10 more
Pom.xml:
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.8.5</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.1</version>
</dependency>
<dependency>
<groupId>asm</groupId>
<artifactId>asm</artifactId>
<version>3.3.1</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
spring.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:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/jee
http://www.springframework.org/schema/jee/spring-jee.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/task
http://www.springframework.org/schema/task/spring-task.xsd">
<aop:aspectj-autoproxy />
<bean name="triangle" class="com.spring.aop.model.Triangle">
<property name="name" value="Triangle name" />
</bean>
<bean name="circle" class="com.spring.aop.model.Circle">
<property name="name" value="Circle name" />
</bean>
<bean name="shapeService" class="com.spring.aop.service.ShapeService" autowire="byName" />
<bean name="loggingAspect" class="com.spring.aop.aspect.LoggingAspect" />
</beans>
Circle.java:
package com.spring.aop.model;
public class Circle {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
Triangle.java
package com.spring.aop.model;
public class Triangle {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
LoggingAspect.java:
package com.spring.aop.aspect;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
@Aspect
public class LoggingAspect {
@Before("execution(public String getName())")
public void LoggingAdvice(){
System.out.println("Advice run. Get method called");
}
}
AOPMain.java
package com.spring.aop;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.spring.aop.service.ShapeService;
public class AOPMain {
public static void main(String[] args) {
ApplicationContext ctx = new ClassPathXmlApplicationContext("spring.xml");
ShapeService shapeService = ctx.getBean("shapeService", ShapeService.class);
System.out.println(shapeService.getCircle().getName());
}
}
ShapeService.java:
package com.spring.aop.service;
import com.spring.aop.model.Circle;
import com.spring.aop.model.Triangle;
public class ShapeService {
private Circle circle;
private Triangle triangle;
public Circle getCircle() {
return circle;
}
public void setCircle(Circle circle) {
this.circle = circle;
}
public Triangle getTriangle() {
return triangle;
}
public void setTriangle(Triangle triangle) {
this.triangle = triangle;
}
}
I tried to developed Annotation class, also I'm not sure how we can developed Autowire byName?
我试图开发Annotation类,我也不确定我们如何开发Autowire byName?
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.spring.aop.aspect.LoggingAspect;
import com.spring.aop.model.Circle;
import com.spring.aop.model.Triangle;
import com.spring.aop.service.ShapeService;
@Configuration
public class AppConfig {
@Bean(name="circle")
public Circle MyCircle(){
Circle circle = new Circle();
circle.setName("Triangle name");
return circle;
}
@Bean(name="triangle")
public Triangle myTriangle(){
Triangle triangle = new Triangle();
triangle.setName("Circle name");
return triangle;
}
@Bean(name="shapeService")
public ShapeService shapeService(){
return new ShapeService();
}
@Bean(name="loggingAspect")
public LoggingAspect loggingAspect(){
return new LoggingAspect();
}
}
But its giving me
但它给了我
May 14, 2015 1:44:23 AM org.springframework.context.annotation.AnnotationConfigApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@15e6e48b: startup date [Thu May 14 01:44:23 IST 2015]; root of context hierarchy
Exception in thread "main" java.lang.NullPointerException
at com.spring.aop.AOPMain.main(AOPMain.java:14)
Any quick guidance?
有快速指导吗?
2 个解决方案
#1
It looks simple solution, just add following dependencies:
它看起来很简单,只需添加以下依赖项:
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.5</version>
</dependency>
#2
The root cause here is a missing dependency. Try adding:
这里的根本原因是缺少依赖性。尝试添加:
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.5</version>
to your POM.
到你的POM。
#1
It looks simple solution, just add following dependencies:
它看起来很简单,只需添加以下依赖项:
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.5</version>
</dependency>
#2
The root cause here is a missing dependency. Try adding:
这里的根本原因是缺少依赖性。尝试添加:
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.5</version>
to your POM.
到你的POM。