抛java.lang.NoClassDefFoundError: org.apache.commons.lang3.ObjectUtils错误

        根据上面的错误信息可以明确的知道是因为缺少commons-lang3-3.3.2.jar文件造成，你需要到网上下载该jar文件，然后将下载好的jar文件放到当前项目的classpath路径下面，即可解决该问题。

错误信息：

2015-1-31 21:36:36 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions

信息: Loading XML bean definitions from class path resource [activiti.cfg.xml]

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/lang3/ObjectUtils

at org.activiti.engine.impl.cfg.ProcessEngineConfigurationImpl.initSqlSessionFactory(ProcessEngineConfigurationImpl.java:638)

at org.activiti.engine.impl.cfg.ProcessEngineConfigurationImpl.init(ProcessEngineConfigurationImpl.java:386)

at org.activiti.engine.impl.cfg.ProcessEngineConfigurationImpl.buildProcessEngine(ProcessEngineConfigurationImpl.java:362)

at com.bug315.ActivitiTest01.main(ActivitiTest01.java:11)

Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang3.ObjectUtils

at java.net.URLClassLoader$1.run(URLClassLoader.java:202)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:190)

at java.lang.ClassLoader.loadClass(ClassLoader.java:307)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)

at java.lang.ClassLoader.loadClass(ClassLoader.java:248)

... 4 more

解决办法：

    将commons-lang3-3.3.2.jar导入到项目的classpath下面，问题即可解决。