Question

我是春天的新手。尝试时我可以使用

从xml配置中设置自动装配

<bean id="triangle" class="com.spring.sample.Triangle" autowire="byName"/>

我还尝试使用@autowire注释，在定义像

这样的bean时成功

<bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"></bean>

但是当我尝试使用<context:annotation-config />时，我遇到了以下异常。

INFO: Loading XML bean definitions from class path resource [Spring.xml]
Exception in thread "main" java.lang.IllegalArgumentException
    at org.springframework.asm.ClassReader.<init>(Unknown Source)
    at org.springframework.asm.ClassReader.<init>(Unknown Source)
    at org.springframework.asm.ClassReader.<init>(Unknown Source)
    at org.springframework.core.type.classreading.SimpleMetadataReader.<init>(SimpleMetadataReader.java:52)
    at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:80)
    at org.springframework.core.type.classreading.CachingMetadataReaderFactory.getMetadataReader(CachingMetadataReaderFactory.java:101)
    at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:76)
    at org.springframework.context.annotation.ConfigurationClassUtils.checkConfigurationClassCandidate(ConfigurationClassUtils.java:70)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:253)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:223)
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:630)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:461)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
    at com.spring.sample.MainSpringClass.main(MainSpringClass.java:17)

我在StackOverflow的几个问题中发现了这个问题，但没有一个能提供可靠的答案。

JDK version :1.8.0_144
Spring framework: 3.2.0.RELEASE

Spring XML配置

<?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:dwr="http://www.directwebremoting.org/schema/spring-dwr"
  xmlns:mongo="http://www.springframework.org/schema/data/mongo"
  xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-3.0.xsd
    http://www.springframework.org/schema/data/mongo
    http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd
    http://www.directwebremoting.org/schema/spring-dwr
    http://www.directwebremoting.org/schema/spring-dwr-3.0.xsd">
    <bean id="triangle" class="com.spring.sample.Triangle">     
    </bean>

    <bean id="pointA" class="com.spring.sample.Point">
        <property name="x" value="10" />
        <property name="y" value="$10" />
    </bean>
    <bean id="pointB" class="com.spring.sample.Point">
        <property name="x" value="20" />
        <property name="y" value="20" />
    </bean>
    <bean id="pointC" class="com.spring.sample.Point">
        <property name="x" value="30" />
        <property name="y" value="30" />
    </bean>
    <!-- <bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"></bean> -->
        <context:annotation-config />
</beans>

最后是Bean Triangle

public class Triangle {

    @Autowired
    private Point pointA;
    @Autowired
    private Point pointB;
    @Autowired
    private Point pointC;

    public Point getPointA() {
        return pointA;
    }

    public void setPointA(Point pointA) {
        this.pointA = pointA;
    }

    public Point getPointB() {
        return pointB;
    }

    public void setPointB(Point pointB) {
        this.pointB = pointB;
    }

    public Point getPointC() {
        return pointC;
    }

    public void setPointC(Point pointC) {
        this.pointC = pointC;
    }
}

如何在配置中使用上下文标记来解决此异常？

Answer 1

发现了这个问题。问题不在于代码，而在于Spring Framework版本。 JDK 1.8与Spring框架不兼容：3.2.0.RELEASE。升级spring框架解决了这个问题。

给出上下文时的异常：annotation-config

1 个答案: