java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory 解决方案

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Spring3.1启动时报错：
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
at org.springframework.core.CollectionFactory.(CollectionFactory.java:64)
at org.springframework.core.SimpleAliasRegistry.(SimpleAliasRegistry.java:41)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.(DefaultSingletonBeanRegistry.java:73)
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.(FactoryBeanRegistrySupport.java:41)
at org.springframework.beans.factory.support.AbstractBeanFactory.(AbstractBeanFactory.java:146)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.(AbstractAutowireCapableBeanFactory.java:144)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.(AbstractAutowireCapableBeanFactory.java:155)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.(DefaultListableBeanFactory.java:121)
at org.springframework.beans.factory.xml.XmlBeanFactory.(XmlBeanFactory.java:72)
at org.springframework.beans.factory.xml.XmlBeanFactory.(XmlBeanFactory.java:61)
at spring.test.SpringTest.main(SpringTest.java:12)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 11 more

缺少 commons-logging.jar，也可以添加commons-logging-1.0.4.jar，建议使用后者或者更新版本。