Spring 3.0.x - 上下文 :component-scan result into list

Question

我想知道是否有可能将组件扫描中的 spring bean 放入列表中以将列表注入(inject)到属性中？

我正在使用 Spring 3.0.x 和 Java 6 (1.6)。

到目前为止我已经尝试过以下内容:

<util:list id="converterList">
    <context:component-scan base-package="com.company.convert"/>
</util:list>
<!-- configure custom b2bde converters -->
<bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
    <property name="converters">
        <list>
            <ref local="converterList"/>
        </list>
    </property>
</bean>

但我遇到以下异常:

SEVERE: Exception sending context initialized event to listener instance of class de.hybris.platform.spring.HybrisContextLoaderListener
org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Incorrect usage of element 'context:component-scan' in a nested
 manner. This tag cannot be used nested inside <property>.
Offending resource: ServletContext resource [/WEB-INF/my-servlet.xml]

        at org.springframework.beans.factory.parsing.FailFastProblemReporter.error(FailFastProblemReporter.java:68)
        at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:85)
        at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:80)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.error(BeanDefinitionParserDelegate.java:284)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseNestedCustomElement(BeanDefinitionParserDelegate.java:1390)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parsePropertySubElement(BeanDefinitionParserDelegate.java:956)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCollectionElements(BeanDefinitionParserDelegate.java:1140)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseListElement(BeanDefinitionParserDelegate.java:1116)
        at org.springframework.beans.factory.xml.UtilNamespaceHandler$ListBeanDefinitionParser.doParse(UtilNamespaceHandler.java:123)
        at org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser.parseInternal(AbstractSingleBeanDefinitionParser.java:85)
        at org.springframework.beans.factory.xml.AbstractBeanDefinitionParser.parse(AbstractBeanDefinitionParser.java:59)
        at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:73)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1335)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1325)
        at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:135)
        at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:93)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302)
        at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:143)
        at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:178)
        at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:149)
        at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:124)
        at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:93)
        at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:130)
        at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:467)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:397)

我是否遗漏了一点，或者是否真的不可能扫描bean，将它们放入列表中并在属性中使用该列表？

最诚挚的问候，沃尔特

Answer 1

您可能永远无法在 XML 中做到这一点，但使用 Java Config (Spring 3 的一项功能)，使用 org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider 应该很简单。

更新了以下评论

或者继续使用XML <context:component-scan base-package="com.company.convert"/>要注册 bean，然后在 Java 配置中，使用 org.springframework.beans.factory.ListableBeanFactory.getBeansOfType(Class<T>) (从有线 ApplicationContext 对象)获取所有这些并调用 conversionService 的 setter。