commons-Validate的例子导进去总是报这个错..!求高手解决.急

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/digester/Rule
at com.sec.web.Validator.ValidateExample.main(ValidateExample.java:79)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.digester.Rule
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
... 1 more
exception --------------------编程问答--------------------

--------------------编程问答-------------------- 类没找到，缺包啊

MAVEN2] commons-digester-1.2.jar
[MAVEN2] commons-digester-1.3.jar
[MAVEN2] commons-digester-1.4.1.jar
[MAVEN2] commons-digester-1.5.jar
[MAVEN2] commons-digester-1.6.jar
[MAVEN2] commons-digester-1.7.jar
[MAVEN2] commons-digester-1.8.1.jar
[MAVEN2] commons-digester-1.8.jar
[MAVEN2] commons-digester-2.0.jar --------------------编程问答--------------------

Quote: 引用 2 楼 rainbowsix 的回复:

可是我的包已经导进去了..你没看到？ --------------------编程问答--------------------
引用 3 楼 S515905749 的回复:
Quote: 引用 2 楼 rainbowsix 的回复:

可是我的包已经导进去了..你没看到？

你没看到版本不一样？
补充：Java ,  Java EE