Question

我尝试在Spring中创建一个简单的AOP示例。但是，我得到了AOP错误。

Knight.java

package com.springinaction.knights;

public abstract class Knight {
     public abstract void embarkQuest() ;
}

DragonSlayingKnights.java

package com.springinaction.knights;
public class DragonSlayingKnights extends Knight {
    Quest quest;
    public DragonSlayingKnights(Quest quest){
        this.quest = quest ;    
    }
    @Override
    public void embarkQuest() {
        quest.embark();
    }
}

FightingKnight.java

package com.springinaction.knights;

public class FightingKnight extends Knight {
     Quest quest ;

     public FightingKnight(Quest quest){
         this.quest = quest;
     }
     @Override
     public void embarkQuest() {
         quest.embark();
     }
}

Quest.java

package com.springinaction.knights;

public abstract class Quest {
    public abstract void embark();
}

DragonSlayingQuest.java

package com.springinaction.knights;
public class DragonSlayingQuest extends Quest {
    @Override
    public void embark() {
        System.out.println("I am on a Dragon Slaying Quest");
    }
}

FightingQuest.java

package com.springinaction.knights;
public class FightingQuest extends Quest {
    @Override
    public void embark() {
        System.out.println("I am on a Fighting Quest");
    }
}

Minstrel.java

package com.springinaction.knights;
public class Minstrel {
    public void singBeforeQuest(){
        System.out.println("Falala;Theknightissobrave!");
    }
    public void singAfterQuest(){
        System.out.println("Tee heehe;Thebraveknightdidembarkonaquest!");
    }
}

configuration.xml文件

<?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:aop="http://www.springframework.org/schema/aop" 
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
     http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
     http://www.springframework.org/schema/aop 
     http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
     <bean id="knight" class="com.springinaction.knights.DragonSlayingKnights">
        <constructor-arg ref="quest"/>
     </bean>
     <bean id="quest" class="com.springinaction.knights.DragonSlayingQuest"/>   
     <bean id="minstrel" class="com.springinaction.knights.Minstrel"/>
     <aop:config>
         <aop:aspect ref="minstrel">
             <aopointcut id="embark" expression="execution(*com.springinaction.knights.Knight.embarkQuest(..)) " />
             <aop:before pointcut-ref="embark" method="singBeforeQuest"/>
             <aop:after pointcut-ref="embark" method="singAfterQuest"/>
         </aop:aspect>
      </aop:config>
</beans>

测试文件 - TestKnights.java

package com.test.spring;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlAp plicationContext;
import com.springinaction.knights.Knight;

public class TestKnights {
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("configuration.xml" );
        Knight knight = (Knight) context.getBean("knight");
        knight.embarkQuest();
    }
}

当我执行TestKnights.java时，出现以下错误：

2011年11月5日下午8:59:46 org.springframework.context.support.AbstractApplicationContext prepareRefresh 信息：刷新org.springframework.context.support.ClassPathXmlApplicationContext@5d764be1：启动日期[2011年11月5日星期六20:59:46 PDT];上下文层次结构的根 2011年11月5日下午8:59:46 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions 信息：从类路径资源[configuration.xml]加载XML bean定义 2011年11月5日下午8:59:46 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons 信息：在org.springframework.beans.factory.support.DefaultListableBeanFactory@485fcf29中预先实例化单例：定义bean [knight，quest，minstrel，org.springframework.aop.config.internalAutoProxyCreator，org.springframework.aop.aspectj.AspectJPointcutAdvisor＃ 0，org.springframework.aop.aspectj.AspectJPointcutAdvisor＃1，踏上];工厂层级的根 2011年11月5日下午8:59:46 org.springframework.beans.factory.support.DefaultSingletonBeanRegistry destroySingletons 信息：在org.springframework.beans.factory.support.DefaultListableBeanFactory@485fcf29中销毁单身人士：定义bean [knight，quest，minstrel，org.springframework.aop.config.internalAutoProxyCreator，org.springframework.aop.aspectj.AspectJPointcutAdvisor＃0， org.springframework.aop.aspectj.AspectJPointcutAdvisor＃1，踏上];工厂层级的根线程＆＃34; main＆＃34;中的例外情况org.springframework.beans.factory.BeanCreationException：创建名为＆＃39; knight＆＃39;的bean时出错在类路径资源[configuration.xml]中定义：bean实例化之前的BeanPostProcessor失败;嵌套异常是org.springframework.beans.factory.BeanCreationException：使用名称＆＃39; org.springframework.aop.aspectj.AspectJPointcutAdvisor创建bean时出错＃0＆＃39;：无法创建内部bean＆＃39;（内部bean）＆＃39;设置构造函数参数时类型为[org.springframework.aop.aspectj.AspectJMethodBeforeAdvice];嵌套异常是org.springframework.beans.factory.BeanCreationException：创建名称为＆＃39;（内部bean）的bean时出错＆＃39;：无法解析对bean的引用＆＃39; embark＆＃39;设置构造函数参数时;嵌套异常是org.springframework.beans.factory.BeanCreationException：创建名称为＆＃39;出错的bean时出错：bean的实例化失败;嵌套异常是java.lang.NoClassDefFoundError：org / aspectj / weaver / reflect / ReflectionWorld $ ReflectionWorldException 在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:452） at org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:293）在org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:222）在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:290）在org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:192） at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons（DefaultListableBeanFactory.java:585）在org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:895）在org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:425）在org.springframework.context.support.ClassPathXmlApplicationContext。（ClassPathXmlApplicationContext.java:139）在org.springframework.context.support.ClassPathXmlApplicationContext。（ClassPathXmlApplicationContext.java:83）在com.test.spring.TestKnights.main（TestKnights.java:9）由以下原因引起：org.springframework.beans.factory.BeanCreationException：使用名称＆＃39; org.springframework.aop.aspectj.AspectJPointcutAdvisor创建bean时出错＃0＆＃39;：无法创建内部bean＆＃39;（内部bean）＆＃39;设置构造函数参数时类型为[org.springframework.aop.aspectj.AspectJMethodBeforeAdvice];嵌套异常是org.springframework.beans.factory.BeanCreationException：创建名称为＆＃39;（内部bean）的bean时出错＆＃39;：无法解析对bean的引用＆＃39; embark＆＃39;设置构造函数参数时;嵌套异常是org.springframework.beans.factory.BeanCreationException：创建名称为＆＃39;出错的bean时出错：bean的实例化失败;嵌套异常是java.lang.NoClassDefFoundError：org / aspectj / weaver / reflect / ReflectionWorld $ ReflectionWorldException 在org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean（BeanDefinitionValueResolver.java:281）在org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary（BeanDefinitionValueResolver.java:125） at org.springframework.beans.factory.support.ConstructorResolver.resolveConstructorArguments（ConstructorResolver.java:630）在org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor（ConstructorResolver.java:148）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor（AbstractAutowireCapableBeanFactory.java:1003）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance（AbstractAutowireCapableBeanFactory.java:907）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:485）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:456） at org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:293）在org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:222）在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:290）在org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:196）在org.springframework.aop.framework.autoproxy.BeanFactoryAdvisorRetrievalHelper.findAdvisorBeans（BeanFactoryAdvisorRetrievalHelper.java:86）在org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findCandidateAdvisors（AbstractAdvisorAutoProxyCreator.java:100）在org.springframework.aop.aspectj.autoproxy.AspectJAwareAdvisorAutoProxyCreator.shouldSkip（AspectJAwareAdvisorAutoProxyCreator.java:107）在org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessBeforeInstantiation（AbstractAutoProxyCreator.java:278）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInstantiation（AbstractAutowireCapableBeanFactory.java:848）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.resolveBeforeInstantiation（AbstractAutowireCapableBeanFactory.java:820）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:446） ......还有10个引起：org.springframework.beans.factory.BeanCreationException：创建名称为＆＃39;（内部bean）的bean时出错＆＃39;：无法解析对bean的引用＆＃39; embark＆＃39;设置构造函数参数时;嵌套异常是org.springframework.beans.factory.BeanCreationException：创建名称为＆＃39;出错的bean时出错：bean的实例化失败;嵌套异常是java.lang.NoClassDefFoundError：org / aspectj / weaver / reflect / ReflectionWorld $ ReflectionWorldException 在org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference（BeanDefinitionValueResolver.java:328）在org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary（BeanDefinitionValueResolver.java:106）在org.springframework.beans.factory.support.ConstructorResolver.resolveConstructorArguments（ConstructorResolver.java:616）在org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor（ConstructorResolver.java:148）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor（AbstractAutowireCapableBeanFactory.java:1003）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance（AbstractAutowireCapableBeanFactory.java:907）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:485）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:456）在org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean（BeanDefinitionValueResolver.java:270） ......还有28个由以下原因引起：org.springframework.beans.factory.BeanCreationException：创建名称为＆＃39;出错的bean时出错：bean的实例化失败;嵌套异常是java.lang.NoClassDefFoundError：org / aspectj / weaver / reflect / ReflectionWorld $ ReflectionWorldException 在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean（AbstractAutowireCapableBeanFactory.java:965）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance（AbstractAutowireCapableBeanFactory.java:911）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:485）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:456）在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:312）在org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:192）在org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference（BeanDefinitionValueResolver.java:322） ......还有36个引起：java.lang.NoClassDefFoundError：org / aspectj / weaver / reflect / ReflectionWorld $ ReflectionWorldException at java.lang.Class.getDeclaredConstructors0（Native Method） at java.lang.Class.privateGetDeclaredConstructors（Class.java:2389） at java.lang.Class.getConstructor0（Class.java:2699） at java.lang.Class.getDeclaredConstructor（Class.java:1985）在org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate（SimpleInstantiationStrategy.java:65）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean（AbstractAutowireCapableBeanFactory.java:958） ......还有42个引起：java.lang.ClassNotFoundException：org.aspectj.weaver.reflect.ReflectionWorld $ ReflectionWorldException 在java.net.URLClassLoader $ 1.run（URLClassLoader.java:202） at java.security.AccessController.doPrivileged（Native Method）在java.net.URLClassLoader.findClass（URLClassLoader.java:190） at java.lang.ClassLoader.loadClass（ClassLoader.java:307）在sun.misc.Launcher $ AppClassLoader.loadClass（Launcher.java:301）在java.lang.ClassLoader.loadClass（ClassLoader.java:248） ......还有48个

Answer 1

您需要在类路径上使用AspectJ。它没有Spring。

Answer 2

尝试将aspectjweaver.jar添加到类路径中。

Answer 3

下载aspectjweaver.jar并添加到您的类路径中。然后它应该工作。

Answer 4

我的解决方案是删除aspectj文件夹（Users \ .m2 \ repository \ org \ aspectj for me）并让maven重新下载它。不知道问题是什么......

尽管我的classpath和我的依赖项中有aspectweaver.jar，但我仍然遇到了问题，所以这适用于那些上述解决方案无效的人。

Answer 5

Spring for Action第1章

正如@ les2所说，aspectj并没有随春天发货。

如果您正在使用maven，请将此依赖项添加到您的pom文件

<dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>{Your-Version}</version>
    </dependency>

在那之后尝试给它一个旋转

同样适用于所有感兴趣的结帐Habuma's Github。他完成了编写“春天的行动”中的例子的努力。

Answer 6

我将aspectjrt和aspectjtools添加到pom.xml及其现在正在工作。

<dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjrt</artifactId>
        <version>1.7.4</version>
        <scope>runtime</scope>
    </dependency>

    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjtools</artifactId>
        <version>1.7.4</version>
    </dependency>enter code here

Answer 7

对于Java 8来说，完美的解决方案是在pom.xml中添加Aspectjrt和Aspectjtools！

    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjrt</artifactId>
        <version>1.8.7</version>
    </dependency>
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjtools</artifactId>
        <version>1.8.4</version>
    </dependency>

Spring AOP程序 - 实例化失败

7 个答案: