java - Spring 为自定义 Aspect 抛出 ClassNotFound

Question

我正在尝试使用 Spring AOP，但遇到了麻烦。这是:

Caused by: org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.codarama.diet.event.aop.ProfilingAdvice] for bean with name 'profilingAdvice' defined in class path resource [META-INF/test-contexts/testProfilingAdvice.xml]; nested exception is java.lang.ClassNotFoundException: org.codarama.diet.event.aop.ProfilingAdvice

以下是分析建议:

package org.codarama.diet.event.aop;

import com.google.common.base.Stopwatch;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.codarama.diet.component.ListenableComponent;
import org.codarama.diet.event.model.MinimizationEndEvent;
import org.codarama.diet.event.model.MinimizationEvent;
import org.codarama.diet.event.model.MinimizationStartEvent;

import java.util.Set;

@Aspect
public class ProfilingAdvice extends ListenableComponent {

  @Around("org.codarama.diet.event.aop.IndexingAspect.get()")
  public Object profileGet(ProceedingJoinPoint pjp) throws Throwable {
    // some code
  }

  @Around("org.codarama.diet.event.aop.IndexingAspect.index()")
  public Object profileIndex(ProceedingJoinPoint pjp) throws Throwable {
    // some more code  
  }

  @Around("org.codarama.diet.event.aop.MinimizationAspect.minimize()")
  public Object profileMinimize(ProceedingJoinPoint pjp) throws Throwable {
    // and some more code
  }
}

我正在使用 XML 配置，以下是相关部分(我希望):

<context:spring-configured/>
<context:annotation-config/>
<aop:aspectj-autoproxy/>

...

<bean id="indexingAspect" class="org.codarama.diet.event.aop.IndexingAspect"/>
<bean id="minimizationAspect" class="org.codarama.diet.event.aop.MinimizationAspect"/>
<bean id="profilingAdvice" class="org.codarama.diet.event.aop.ProfilingAdvice" parent="listenableComponent"/>

...

<bean id="listenableComponent" class="org.codarama.diet.component.ListenableComponent" abstract="true">
    <property name="eventBus" ref="statusUpdateEventBus"/>
</bean>

<bean id="statusUpdateEventBus" class="com.google.common.eventbus.AsyncEventBus">
    <constructor-arg ref="eventBusExecutor"/>
</bean>

<bean id="eventBusExecutor" class="java.util.concurrent.Executors" factory-method="newFixedThreadPool">
    <constructor-arg value="1"/>
</bean>

和 POM:

    <org.springframework.version>
        4.3.1.RELEASE
    </org.springframework.version>
    <aspectj.version>1.8.9</aspectj.version>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-expression</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aspects</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context-support</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>${org.springframework.version}</version>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjrt</artifactId>
        <version>${aspectj.version}</version>
    </dependency>

    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>${aspectj.version}</version>
    </dependency>

    <dependency>
        <groupId>aopalliance</groupId>
        <artifactId>aopalliance</artifactId>
        <version>1.0</version>
    </dependency>

很抱歉这篇文章很长，但我读了又读了几本指南，目前有点难住了。

Answer 1

找到了。

事实证明，我之前已经使用 aspect AspectJ 关键字定义了切面。像这样:

@Aspect
public aspect ProfilingAdvice extends ListenableComponent {
    // code
}

我后来用 class 定义了它，但无论如何，它所做的是它创建了文件 .aj 而不是 .java ，因此 javac 没有编译它，因此 .class 文件在运行时丢失。

我所要做的就是将 .aj 重命名为 .java，一切都很好。