org.springframework.beans.factory.BeanCreationException：创建类路径资源中定义的名称为“三角形”的bean时出错答案

【问题标题】：org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'triangle' defined in class path resourceorg.springframework.beans.factory.BeanCreationException：创建类路径资源中定义的名称为“三角形”的bean时出错
【发布时间】：2015-05-13 18:53:07
【问题描述】：

我对 Spring AOP 很陌生。我开发了下面的代码，只是为了在 LoggingAspect 之前运行 Circles getName 方法。我还希望将所有 xml bean 都写入注释中，我们该怎么做呢？以下错误如何解决？

我想我已经提供了足够的信息。有专家的快速帮助吗？

这是我的项目结构：

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;
    }
}

三角形.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;
    }
}

我尝试开发 Annotation 类，也不知道如何开发 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();
    }
}

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)

有什么快速指导吗？

【问题讨论】：

标签： java spring-mvc aop spring-aop

【解决方案1】：

看起来很简单的解决方案，只需添加以下依赖项：

<dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjweaver</artifactId>
    <version>1.8.5</version>
</dependency>

【讨论】：

【解决方案2】：

这里的根本原因是缺少依赖项。尝试添加：

<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.5</version>

到您的 POM。

【讨论】：

嗨 - 谢谢。我们如何将 xml 文件转换为注解？
@user4567570 不确定您指的是哪些 XML。我建议为此创建一个新问题 - 这超出了您原始帖子的范围。
嗨 - 不，我已经在我的帖子中询问过“我还希望将所有 xml bean 写入注释中，我们如何做到这一点？”。请指导。
你看过 Spring 的注解配置文档吗？使用@Bean annorations 创建应用程序上下文的模拟是相当简单的