I am facing a problem in running this example. Everything goes fine but at the time of warning it shows some kind of an error. Here is the error which it shows: 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 Main.main(Main.java:12) Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:252) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) ... 11 more Java Result: 1 BUILD SUCCESSFUL (total time: 2 seconds)