spring3的一个报错，原因是maven依赖包冲突，有重复的依赖。

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报错如下：

严重: Context initialization failedorg.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.web.context.support.XmlWebApplicationContext]: Constructor threw exception; nested exception is java.lang.NoSuchMethodError: org.springframework.core.convert.converter.ConverterRegistry.addConverter(Ljava/lang/Class;Ljava/lang/Class;Lorg/springframework/core/convert/converter/Converter;)Vat org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:162)at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:104)at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:339)at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:281)at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4205)at org.apache.catalina.core.StandardContext.start(StandardContext.java:4704)at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)at org.apache.catalina.core.StandardService.start(StandardService.java:525)at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)at org.apache.catalina.startup.Catalina.start(Catalina.java:595)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)at java.lang.reflect.Method.invoke(Method.java:597)at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)Caused by: java.lang.NoSuchMethodError: org.springframework.core.convert.converter.ConverterRegistry.addConverter(Ljava/lang/Class;Ljava/lang/Class;Lorg/springframework/core/convert/converter/Converter;)Vat org.springframework.core.convert.support.DefaultConversionService.addScalarConverters(DefaultConversionService.java:62)at org.springframework.core.convert.support.DefaultConversionService.addDefaultConverters(DefaultConversionService.java:53)at org.springframework.core.convert.support.DefaultConversionService.<init>(DefaultConversionService.java:42)at org.springframework.core.env.AbstractPropertyResolver.<init>(AbstractPropertyResolver.java:44)at org.springframework.core.env.PropertySourcesPropertyResolver.<init>(PropertySourcesPropertyResolver.java:42)at org.springframework.core.env.AbstractEnvironment.<init>(AbstractEnvironment.java:101)at org.springframework.core.env.StandardEnvironment.<init>(StandardEnvironment.java:54)at org.springframework.web.context.support.StandardServletEnvironment.<init>(StandardServletEnvironment.java:43)at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.createEnvironment(AbstractRefreshableWebApplicationContext.java:139)at org.springframework.context.support.AbstractApplicationContext.<init>(AbstractApplicationContext.java:227)at org.springframework.context.support.AbstractApplicationContext.<init>(AbstractApplicationContext.java:217)at org.springframework.context.support.AbstractRefreshableApplicationContext.<init>(AbstractRefreshableApplicationContext.java:82)at org.springframework.context.support.AbstractRefreshableConfigApplicationContext.<init>(AbstractRefreshableConfigApplicationContext.java:51)at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.<init>(AbstractRefreshableWebApplicationContext.java:94)at org.springframework.web.context.support.XmlWebApplicationContext.<init>(XmlWebApplicationContext.java:62)at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)at java.lang.reflect.Constructor.newInstance(Constructor.java:513)at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)... 19 more2012-2-22 10:55:32 org.apache.catalina.core.StandardContext listenerStart严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListenerorg.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.web.context.support.XmlWebApplicationContext]: Constructor threw exception; nested exception is java.lang.NoSuchMethodError: org.springframework.core.convert.converter.ConverterRegistry.addConverter(Ljava/lang/Class;Ljava/lang/Class;Lorg/springframework/core/convert/converter/Converter;)Vat org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:162)at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:104)at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:339)at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:281)at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4205)at org.apache.catalina.core.StandardContext.start(StandardContext.java:4704)at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)at org.apache.catalina.core.StandardService.start(StandardService.java:525)at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)at org.apache.catalina.startup.Catalina.start(Catalina.java:595)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)at java.lang.reflect.Method.invoke(Method.java:597)at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)Caused by: java.lang.NoSuchMethodError: org.springframework.core.convert.converter.ConverterRegistry.addConverter(Ljava/lang/Class;Ljava/lang/Class;Lorg/springframework/core/convert/converter/Converter;)Vat org.springframework.core.convert.support.DefaultConversionService.addScalarConverters(DefaultConversionService.java:62)at org.springframework.core.convert.support.DefaultConversionService.addDefaultConverters(DefaultConversionService.java:53)at org.springframework.core.convert.support.DefaultConversionService.<init>(DefaultConversionService.java:42)at org.springframework.core.env.AbstractPropertyResolver.<init>(AbstractPropertyResolver.java:44)at org.springframework.core.env.PropertySourcesPropertyResolver.<init>(PropertySourcesPropertyResolver.java:42)at org.springframework.core.env.AbstractEnvironment.<init>(AbstractEnvironment.java:101)at org.springframework.core.env.StandardEnvironment.<init>(StandardEnvironment.java:54)at org.springframework.web.context.support.StandardServletEnvironment.<init>(StandardServletEnvironment.java:43)at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.createEnvironment(AbstractRefreshableWebApplicationContext.java:139)at org.springframework.context.support.AbstractApplicationContext.<init>(AbstractApplicationContext.java:227)at org.springframework.context.support.AbstractApplicationContext.<init>(AbstractApplicationContext.java:217)at org.springframework.context.support.AbstractRefreshableApplicationContext.<init>(AbstractRefreshableApplicationContext.java:82)at org.springframework.context.support.AbstractRefreshableConfigApplicationContext.<init>(AbstractRefreshableConfigApplicationContext.java:51)at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.<init>(AbstractRefreshableWebApplicationContext.java:94)at org.springframework.web.context.support.XmlWebApplicationContext.<init>(XmlWebApplicationContext.java:62)at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)at java.lang.reflect.Constructor.newInstance(Constructor.java:513)at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)... 19 more2012-2-22 10:55:32 org.apache.catalina.core.StandardContext start

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我的pom.xml如下：

<dependencies><dependency><groupId>org.springframework</groupId><artifactId>org.springframework.core</artifactId><version>3.0.6.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>3.1.1.RELEASE</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.0.6</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.0.2</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>3.8.1</version><scope>test</scope></dependency><dependency><groupId>commons-dbcp</groupId><artifactId>commons-dbcp</artifactId><version>1.4</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><version>2.5</version></dependency><dependency><groupId>jdbc.mysql</groupId><artifactId>mysql-connector</artifactId><version>5.1.5</version></dependency></dependencies>
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我把<dependency><groupId>org.springframework</groupId><artifactId>org.springframework.core</artifactId><version>3.0.6.RELEASE</version></dependency>
删掉后，就不报错了。可能原因是，spirng-web已经依赖了org.springframework.core，这样就重复依赖了。可问题是，徐晓斌的《maven实战》5.7节说，maven会自己调解依赖的啊？不解，求解释。
参考了：http://forum.springsource.org/showthread.php?113485-java-lang-NoSuchMethodError-org-springframework-core-convert-converter-Convert-erRegi
	
					
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