Проблема с использованием библиотеки DisplayTag

Question

Я пытаюсь использовать DisplayTag.jar для отображения datatable в приложении на основе struts2. У меня есть displayTag-1.2.jar и commons-beanutils-1.8 на моем пути сборки, но все же во время выполнения я получаю следующее исключение и пустая страница:

23-nov-2014 0:42:58 org.apache.catalina.core.StandardWrapperValve invoke 
SEVERE: Servlet.service() for servlet default threw exception 
java.lang.ClassNotFoundException: org.apache.commons.beanutils.NestedNullException 
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387) 
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233) 
    at org.displaytag.tags.TemplateTag.evaluateExpression(TemplateTag.java:84) 
    at org.displaytag.tags.TableTag.initParameters(TableTag.java:932) 
    at org.displaytag.tags.TableTag.doStartTag(TableTag.java:767) 
    at org.apache.jsp.transactionsData_jsp._jspService(transactionsData_jsp.java:121) 
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374) 
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342) 
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630) 
    at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436) 
    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374) 
    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302) 
    at org.apache.struts2.dispatcher.ServletDispatcherResult.doExecute(ServletDispatcherResult.java:139) 
    at org.apache.struts2.dispatcher.StrutsResultSupport.execute(St 

Кто-нибудь знает, в чем проблема?

Answer 1

решение принято путем добавления commons-beanutils-1.7.

Answer 2

 
ClassNotFoundException occurs when java doesnt find class files in its classpath. 
class files resides in jars, for this case org.apache.commons.beanutils.NestedNullException class is not found by the JVM, 
Please download the jar from below link and add it to your build path. 
http://commons.apache.org/proper/commons-beanutils/ 
thanks.