异常解决[ asm ClassReader failed to parse class file]
15:56:17,364 []-[DEBUG] Resolved location pattern [classpath*:com/baoy/**/*.class] to resources [file [D:\cache\eclipse4mvn-workplace\DubboDemo\target\classes\com\baoy\base\dao\JdbcTempBaseDao.class], file [D:\cache\eclipse4mvn-workplace\DubboDemo\target\classes\com\baoy\bean\User.class], file [D:\cache\eclipse4mvn-workplace\DubboDemo\target\classes\com\baoy\dao\impl\UserDaoImpl$1.class], file [D:\cache\eclipse4mvn-workplace\DubboDemo\target\classes\com\baoy\dao\impl\UserDaoImpl$UserRowMapper.class], file [D:\cache\eclipse4mvn-workplace\DubboDemo\target\classes\com\baoy\dao\impl\UserDaoImpl.class], file [D:\cache\eclipse4mvn-workplace\DubboDemo\target\classes\com\baoy\dao\UserDao.class], file [D:\cache\eclipse4mvn-workplace\DubboDemo\target\classes\com\baoy\main\Start.class], file [D:\cache\eclipse4mvn-workplace\DubboDemo\target\classes\com\baoy\service\impl\UserServiceImpl.class], file [D:\cache\eclipse4mvn-workplace\DubboDemo\target\classes\com\baoy\service\UserService.class]] Exception in thread "main" org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: file [D:\cache\eclipse4mvn-workplace\DubboDemo\target\classes\com\baoy\base\dao\JdbcTempBaseDao.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 [D:\cache\eclipse4mvn-workplace\DubboDemo\target\classes\com\baoy\base\dao\JdbcTempBaseDao.class]; nested exception is java.lang.IllegalArgumentException at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:290) at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan(ClassPathBeanDefinitionScanner.java:242) 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:1438) at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1428) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:195) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:139) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:108) 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:174) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:209) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:243) at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:127) at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:93) at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:130) at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:537) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:451) at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139) at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93) at com.baoy.main.Start.main(Start.java:16) 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 [D:\cache\eclipse4mvn-workplace\DubboDemo\target\classes\com\baoy\base\dao\JdbcTempBaseDao.class]; nested exception is java.lang.IllegalArgumentException at org.springframework.core.type.classreading.SimpleMetadataReader.<init>(SimpleMetadataReader.java:56) at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:80) at org.springframework.core.type.classreading.CachingMetadataReaderFactory.getMetadataReader(CachingMetadataReaderFactory.java:102) at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:266) ... 24 more Caused by: 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:53) ... 27 more
“ASM ClassReader failed to parse class file”是其中主要的原因。检查Maven的类库，没有发现问题，无asm显性依赖，其依赖产生于spring本身。
a. 使用jdk7
b. 升级spring 4
本人使用 jdk1.8 spring 使用时很早之前的demo spring- 3.1.12.RELEASE ,修改 spring 版本为 4.3.12.RELEASE之后，问题解决
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