at org.springframework.asm.ClassReader.(Unknown Source)

有一次down同事的代碼下來運行，結果發現運行不起來，一開始懷疑是配置問題，但同事那邊是ok，那想著就是環境問題了，但看了許久，發現也沒有看出來，看了下是asm包報出來，然後看asm是Cglib依賴進來的，想著這個問題就應該是版本衝突導致的吧，google了一下，果真發現是jdk7和jdk8版本導致項目中依賴起了衝突。mark一下：項目中用到spring還是3.2的版本，然後看到stackoverflow是這麼回答的： 
The exception you see is not very likely to be cause by invalid Spring configuration but your classpath setup. This feels like a version incompatibility regarding the ASM libraries and Java 8. The ASM version, Spring 3.2 depends on is known to be incompatible with Java 8.

Thus, if you want run your code with Java 8, you need to use a recent Spring 4.0 version

方法測試可行。

異常棧：

 INFO [main] (ZNWebSocketServer.java:35) - 2016-10-15 21:44:02,471 - Load log4j.properties from file system! INFO [main] (AbstractApplicationContext.java:510) - 2016-10-15 21:44:02,596 - Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@e2144e4: startup date [Sat Oct 15 21:44:02 CST 2016]; root of context hierarchy INFO [main] (XmlBeanDefinitionReader.java:315) - 2016-10-15 21:44:02,689 - Loading XML bean definitions from class path resource [applicationContext.xml] INFO [main] (XmlBeanDefinitionReader.java:315) - 2016-10-15 21:44:02,939 - Loading XML bean definitions from class path resource [dao.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.szzhaona.ZNWebSocketServer.main(ZNWebSocketServer.java:41)