java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory

spring框架的运行是依赖于org-apache-commons-logging.jar，所以在用spring框架的时候，一定要引入这个jar包，否则会报错

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

    at org.springframework.context.support.AbstractApplicationContext.<init>(AbstractApplicationContext.java:164)

    at org.springframework.context.support.AbstractRefreshableApplicationContext.<init>(AbstractRefreshableApplicationContext.java:89)

    at org.springframework.context.support.AbstractRefreshableConfigApplicationContext.<init>(AbstractRefreshableConfigApplicationContext.java:58)

    at org.springframework.context.support.AbstractXmlApplicationContext.<init>(AbstractXmlApplicationContext.java:61)

    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:136)

    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)

    at com.mary.beans.Test.main(Test.java:8)

Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory

    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)

    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)

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

    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)

    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)

    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)

    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)