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Spring 2.5開(kāi)始，通過(guò)component-scan和packagesToScan設(shè)置，實(shí)現(xiàn)對(duì)jar包和class文件的package層級(jí)的自動(dòng)掃描，從而利用Annotation實(shí)現(xiàn)零配置。
但在Eclipse RCP中，由于Eclipse的bundle原理，其bundle的jar包url為類(lèi)似：bundleresource://269.fwk7214088/... ， 而Spring對(duì)jar和class文件的scan卻只支持file的protocol，即url必須是類(lèi)似：file:/F:/eclipse/.... 所以在Eclipse RCP中集成SpringFramework，并在spring配置文件中使用component-scan和packagesToScan設(shè)置時(shí)，這兩個(gè)配置失效，并拋出異常：
寫(xiě)道 2010-11-12 16:21:17,843 PathMatchingResourcePatternResolver WARN - Cannot search for matching files underneath URL [bundleresource://269.fwk7214088/com/abc/efg/] because it does not correspond to a directory in the file system java.io.FileNotFoundException: URL [bundleresource://269.fwk7214088/com/abc/efg/] cannot be resolved to absolute file path because it does not reside in the file system: bundleresource://269.fwk7214088/com/abc/efg/ at org.springframework.util.ResourceUtils.getFile(ResourceUtils.java:204) at org.springframework.core.io.AbstractFileResolvingResource.getFile(AbstractFileResolvingResource.java:51) at org.springframework.core.io.UrlResource.getFile(UrlResource.java:168) at org.springframework.core.io.support.PathMatchingResourcePatternResolver.doFindPathMatchingFileResources(PathMatchingResourcePatternResolver.java:530) at org.springframework.core.io.support.PathMatchingResourcePatternResolver.findPathMatchingResources(PathMatchingResourcePatternResolver.java:351) at org.springframework.core.io.support.PathMatchingResourcePatternResolver.getResources(PathMatchingResourcePatternResolver.java:269) at org.springframework.context.support.AbstractApplicationContext.getResources(AbstractApplicationContext.java:1196) at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:204) at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan(ClassPathBeanDefinitionScanner.java:204) at org.springframework.context.annotation.ComponentScanBeanDefinitionParser.parse(ComponentScanBeanDefinitionParser.java:84) 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:136) 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.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:212) at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:126) at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:92) at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:130) at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:465) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:395) at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139) at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
在網(wǎng)上Google無(wú)果的情況下，只好把目標(biāo)放到了： at org.springframework.util.ResourceUtils.getFile(ResourceUtils.java:204)
打開(kāi)org.springframework.core-sources-3.0.1.RELEASE-A中的源碼包，查看ResourceUtils.java:204，發(fā)現(xiàn)其代碼如下： Java代碼 
如果在這段代碼前，可以把bundleresource類(lèi)型的package轉(zhuǎn)換為file類(lèi)型的package，問(wèn)題就可以解決。于是在這段代碼前增加相關(guān)轉(zhuǎn)換處理： Java代碼
編譯后，把ResourceUtil.class替換到spring-core.jar中就可以了。
值得注意的是，因?yàn)檫@里URL的轉(zhuǎn)換使用了org.eclipse.core.runtime.Platform，所以spring-core.jar所在的bundle必須添加Dependencies ： org.eclipse.core.runtime
當(dāng)然了，因?yàn)檫@里的jar包是針對(duì)Eclipse 的RCP所用，所以這個(gè)應(yīng)該也不是大問(wèn)題 |
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