IT工程師數位筆記本

Spring3.1啟動時報錯：  Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory  at org.springframework.core.CollectionFactory.<clinit>(CollectionFactory.java:64)  at org.springframework.core.SimpleAliasRegistry.<init>(SimpleAliasRegistry.java:41)  at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.<init>(DefaultSingletonBeanRegistry.java:73)  at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.<init>(FactoryBeanRegistrySupport.java:41)  at org.springframework.beans.factory.support.AbstractBeanFactory.<init>(AbstractBeanFactory.java:146)  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.<init>(AbstractAutowireCapableBeanFactory.java:144)  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.<init>(AbstractAutowireCapableBeanFactory.java:155)  at org.springframework.beans.factory.support.DefaultListableBeanFactory.<init>(DefaultListableBeanFactory.java:121)  at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(XmlBeanFactory.java:72)  at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(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，建議使用后者或者更新版本。