解决IntelliJ IDEA报错Failed to read candidate component class: file [ ]； nested exception is org.

约定不等于承诺〃 2021-09-25 07:52 472阅读 0赞

### 解决IntelliJ IDEA报错Failed to read candidate component class: file \[ \]; nested exception is org.springframework.core.NestedIOException ###

笔者使用 IntelliJ IDEA 运行以前的一个 Spring 项目时，以前记得运行正常的代码，如今一直报错，百思不得其解。然后发现报错发生在一个普通、基础性的 Spring 方法。笔者当时报错时的运行环境如下：

> 笔者报错时的运行环境：
> 
> JDK 13.0.2
> 
> IntelliJ IDEA 2020.1.2 (Ultimate Edition)
> 
> Spring 5.1.9.RELEASE

这个报错的信息如下：

Exception in thread "XXX" org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: file [XXX.class]; nested exception is org.springframework.core.NestedIOException: ASM ClassReader failed to parse class file - probably due to a new Java class file version that isn't supported yet: file [XXX.class]; nested exception is java.lang.IllegalArgumentException: Unsupported class file major version 57
    	at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.scanCandidateComponents(ClassPathScanningCandidateComponentProvider.java:454)
    	at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:316)
    	at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan(ClassPathBeanDefinitionScanner.java:275)
    	at org.springframework.context.annotation.ComponentScanBeanDefinitionParser.parse(ComponentScanBeanDefinitionParser.java:90)
    	at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:74)
    	at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1391)
    	at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1371)
    	at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:179)
    	at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:149)
    	at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:96)
    	at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:513)
    	at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:393)
    	at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:336)
    	at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:304)
    	at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:188)
    	at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:224)
    	at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:195)
    	at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:257)
    	at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:128)
    	at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:94)
    	at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:133)
    	at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:636)
    	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:521)
    	at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:144)
    	at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:85)
    	at XXX(XXX:XXX)
    Caused by: org.springframework.core.NestedIOException: ASM ClassReader failed to parse class file - probably due to a new Java class file version that isn't supported yet: file [XXX.class]; nested exception is java.lang.IllegalArgumentException: Unsupported class file major version 57
    	at org.springframework.core.type.classreading.SimpleMetadataReader.<init>(SimpleMetadataReader.java:57)
    	at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:103)
    	at org.springframework.core.type.classreading.CachingMetadataReaderFactory.getMetadataReader(CachingMetadataReaderFactory.java:123)
    	at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.scanCandidateComponents(ClassPathScanningCandidateComponentProvider.java:430)
    	... 25 more
    Caused by: java.lang.IllegalArgumentException: Unsupported class file major version 57
    	at org.springframework.asm.ClassReader.<init>(ClassReader.java:184)
    	at org.springframework.asm.ClassReader.<init>(ClassReader.java:166)
    	at org.springframework.asm.ClassReader.<init>(ClassReader.java:152)
    	at org.springframework.asm.ClassReader.<init>(ClassReader.java:273)
    	at org.springframework.core.type.classreading.SimpleMetadataReader.<init>(SimpleMetadataReader.java:54)
    	... 28 more

笔者在经过反复试验排错后，终于找到了根因。这是因为笔者报错时，使用的 Spring 依赖与 JDK 版本不兼容所导致的。因为笔者当初成功运行该项目时，使用的是低版本的 JDK，而现在运行该项目时，使用的是现在安装的 JDK。换句话说，相对于 Spring 的版本`Spring 5.1.9.RELEASE`，JDK 的版本`JDK 13.0.2`太高了。

于是，笔者调高 Spring 的版本，将`Spring 5.1.9.RELEASE`改为`Spring 5.2.9.RELEASE`，结果运行之后，上面的报错就消失了。当然，也可以选择降低 JDK 的版本，不过笔者通常不喜欢这样做。

> 笔者成功运行时的运行环境：
> 
> JDK 13.0.2
> 
> IntelliJ IDEA 2020.1.2 (Ultimate Edition)
> 
> Spring 5.2.9.RELEASE

解决IntelliJ IDEA报错Failed to read candidate component class: file [ ]； nested exception is org.

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