java.lang.NoClassDefFoundError：org / springframework / transaction / interceptor / TransactionInterceptor错误
问题内容：
我正在尝试<tx:annotation-driven /> 使用tomcat 6和postgresql
9.1在tomcat项目下的web.xml中进行配置
我的dispacher-Servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd">
<mvc:default-servlet-handler/>
<mvc:resources mapping="/css/**" location="/css/" />
<context:component-scan base-package="Controllers" />
<context:component-scan base-package="DAOModel" />
<mvc:annotation-driven />
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/"
p:suffix=".jsp" />
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="org.postgresql.Driver" />
<property name="url" value="jdbc:postgresql://localhost:5432/car" />
<property name="username" value="postgres" />
<property name="password" value="123" />
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="annotatedClasses">
<list>
<value>DAOModel.Tblusers</value>
<value>DAOModel.Tblcars</value>
</list>
</property>
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="DAOModel" />
<!-- <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /> -->
</bean>
<tx:annotation-driven />
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
</beans>
和：
java.lang.NoClassDefFoundError: org/springframework/transaction/interceptor/TransactionInterceptor
org.springframework.transaction.config.AnnotationDrivenBeanDefinitionParser$AopAutoProxyConfigurer.configureAutoProxyCreator(AnnotationDrivenBeanDefinitionParser.java:126)
org.springframework.transaction.config.AnnotationDrivenBeanDefinitionParser.parse(AnnotationDrivenBeanDefinitionParser.java:84)
org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:73)
org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1419)
org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1409)
org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:184)
org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:140)
org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:111)
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493)
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390)
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334)
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302)
org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:174)
org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:209)
org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180)
org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:125)
org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:94)
org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:131)
org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:522)
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:436)
org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631)
org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588)
org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645)
org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508)
org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449)
org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133)
javax.servlet.GenericServlet.init(GenericServlet.java:212)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
java.lang.Thread.run(Thread.java:724)
问题答案：
通常，当您在编译时拥有该类但在运行时不存在该类时，便会出现NoClassDef错误。请彻底检查您的Maven依赖项是否存在任何jar冲突。这可能是NoClassDef的可能原因。检查pom.xml并导航到“依赖关系层次结构”选项卡，以验证是否两次都看不到相同的jar，但版本不同。
如果确实有jar冲突，则必须根据使用特定版本的要求删除其中之一
您也可以通过命令行检查依赖关系树。
例如，要了解为什么Maven依赖插件使用Commons Collections 2.0，我们可以在项目目录中执行以下命令：
mvn dependency:tree -Dverbose -Dincludes=commons-collections
这是官方的Maven依赖插件
编辑：直接从Maven依赖插件页面。我认为这将使答案更具描述性，而不是单击几个链接。
官方页面上显示的一个很好的例子，说明了如何使用依赖树来解决冲突
例如，要了解为什么Maven依赖插件使用Commons Collections 2.0，我们可以在项目目录中执行以下命令：
mvn dependency:tree -Dverbose -Dincludes=commons-collections
The verbose flag instructs the dependency tree to display conflicting dependencies that were omitted from the resolved dependency tree. In this case, the goal outputs:
[INFO] [dependency:tree]
[INFO] org.apache.maven.plugins:maven-dependency-plugin:maven-plugin:2.0-alpha-5-SNAPSHOT
[INFO] +- org.apache.maven.reporting:maven-reporting-impl:jar:2.0.4:compile
[INFO] | \- commons-validator:commons-validator:jar:1.2.0:compile
[INFO] | \- commons-digester:commons-digester:jar:1.6:compile
[INFO] | \- (commons-collections:commons-collections:jar:2.1:compile - omitted for conflict with 2.0)
[INFO] \- org.apache.maven.doxia:doxia-site-renderer:jar:1.0-alpha-8:compile
[INFO] \- org.codehaus.plexus:plexus-velocity:jar:1.1.3:compile
[INFO] \- commons-collections:commons-collections:jar:2.0:compile
Thus we can see that Commons Collections 2.0 was chosen over 2.1 since it is nearer, and by default Maven resolves version conflicts with a nearest-wins strategy.
More specifically, in verbose mode the dependency tree shows dependencies that were omitted for: being a duplicate of another; conflicting with another's version and/or scope; and introducing a cycle into the dependency tree.
