Struts2 -java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.FilterDispatcher

Question

I am trying out Struts 2 for first time. I am trying to create a simple Login App. But, I am getting the following Exceptions/Errors:

SEVERE: Exception starting filter struts2
java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.FilterDispatcher
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1676)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521)
    at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:415)
    at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:397)
    at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:118)
    at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:252)
    at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:372)
    at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:98)
    at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4562)
    at org.apache.catalina.core.StandardContext$2.call(StandardContext.java:5240)
    at org.apache.catalina.core.StandardContext$2.call(StandardContext.java:5235)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

Sep 16, 2015 12:21:35 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Error filterStart
Sep 16, 2015 12:21:35 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Context [/Loginreg] startup failed due to previous errors

I am trying to fix it since evening, but unable to fix it. I have searched few materials , but issue was not solved. I have installed 6 basic jar files needed for Struts 2 app. Following are my WEB.xml and Struts.xml File..

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
    <display-name>Login-reg</display-name>

    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>

    </welcome-file-list>
</web-app>

This is my Struts.xml file

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
        "http://struts.apache.org/dtds/struts-2.0.dtd">

    <struts>
        <constant name="struts.enable.DynamicMethodInvocation"
            value="false" />
        <constant name="struts.devMode" value="false" />

        <constant name="struts.custom.i18n.resources"
            value="ApplicationResources" />

        <package name="default" extends="struts-default" namespace="/">

            <action name="login" method="authenticate"
                class="com.struts2.login.LoginAction">
                <result name="success">Welcome.jsp</result>
                <result name="error">Login.jsp</result>

            </action>
        </package>
    </struts>

Answer 1

Struts2 requires a certain number of jar files before executing your programs. Make sure you have these included in your editing tools:

commons-logging-x.x.jar
freemarker-x.x.jar
xwork-x.x.jar
struts2-core-x.x.jar
ognl-x.x.jar