spring-core-3.2.4与spring-asm-3.1.4冲突

冲突带来的错误信息：

org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter struts2
java.lang.IncompatibleClassChangeError: class org.springframework.core.LocalVariableTableParameterNameDiscoverer$ParameterNameDiscoveringVisitor has interface org.springframework.asm.ClassVisitor as super class
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2904)
	at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1173)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1681)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
	at org.springframework.core.LocalVariableTableParameterNameDiscoverer.inspectClass(LocalVariableTableParameterNameDiscoverer.java:112)
	at org.springframework.core.LocalVariableTableParameterNameDiscoverer.getParameterNames(LocalVariableTableParameterNameDiscoverer.java:85)
	at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:193)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1045)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowire(AbstractAutowireCapableBeanFactory.java:344)
	at com.opensymphony.xwork2.spring.SpringObjectFactory.buildBean(SpringObjectFactory.java:179)
	at com.opensymphony.xwork2.spring.SpringObjectFactory.buildBean(SpringObjectFactory.java:154)
	at com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:151)
	at com.opensymphony.xwork2.ObjectFactory.buildInterceptor(ObjectFactory.java:192)
	at com.opensymphony.xwork2.config.providers.InterceptorBuilder.constructInterceptorReference(InterceptorBuilder.java:70)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.lookupInterceptorReference(XmlConfigurationProvider.java:1110)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadInterceptorStack(XmlConfigurationProvider.java:928)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadInterceptorStacks(XmlConfigurationProvider.java:941)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadInterceptors(XmlConfigurationProvider.java:964)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:533)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:292)
	at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:112)
	at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:250)
	at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:67)
	at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:446)
	at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:490)
	at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:74)
	at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:57)
	at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:281)
	at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:262)
	at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:107)
	at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4656)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5312)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
	at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1114)
	at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1673)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
	at java.util.concurrent.FutureTask.run(FutureTask.java:166)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:722)

 

问题切入点：

class org.springframework.core.LocalVariableTableParameterNameDiscoverer$ParameterNameDiscoveringVisitor has interface org.springframework.asm.ClassVisitor as super class

 

spring maven仓库上显示，spring-asm这个版本最高是3.1.4，其他一部分是3.2.4。而且spring2.5以后已经把asm单独封包成spring-asm，也就是说可以用spring-x-最高版本.jar与spring-asm-最高版本.jar来配合使用，但是问题就出现在这里。

 

但是如果你pom.xml里面你把spring-asm-3.1.4和spring-core-3.2.4同时引进去的话（注意：一定要注意顺序，是spring-asm-3.1.4在前，spring-core-3.2.4在后，这会引起包冲突）

 

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-asm</artifactId>
        <version>3.1.4.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>3.2.4.RELEASE</version>
    </dependency>

 

 

原因为：

spring-asm-3.1.4里的ClassVisitor是abstract interface

 

public abstract interface org.springframework.asm.ClassVisitor 

 spring-core-3.2.4里的ClassVisitor是abstract class 

 

 

public abstract class org.springframework.asm.ClassVisitor

 

 

 

spring-core-3.2.4里的这句代码：

 

private static class ParameterNameDiscoveringVisitor extends ClassVisitor

 明显ClassVisitor是 abstract class ，所以造成了冲突。

 

 

解决办法：

1、在pom.xml中去掉spring-asm-3.1.4的引用，因为spring-core-3.2.4已经把asm这个代码重新打包进去了

spring-core-3.2.4 包截图：

 

 

2、如果必须要用spring-asm-3.1.4的话，就在pom文件中，把spring-core-3.2.4的引用放在spring-asm-3.1.4之前（利用类加载顺序，但不建议这么做，会带来一些问题）。

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>3.2.4.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-asm</artifactId>
        <version>3.1.4.RELEASE</version>
    </dependency>