Resolve Error "Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory" in Spring

Spring projects compiles without any errors and warnings but when the code is run it will through the exception.You will have no clues on what is wrong with the code and project.

Stack trace:

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 com.mySpringExample.helloExample.HelloClient.main(HelloClient.java:20)
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
 

Issue: The Spring project does not have a required Jars in the build path.

Resolution : 

Add the library commons-logging.jar to the build path of the project.Then clean and build the project.