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POjava.lang.ClassNotFoundException: org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter when starting Simple Struts2 Application
 

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  1. POjava.lang.ClassNotFoundException: org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter when starting Simple Struts2 Application
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    <p>I am trying to run a simple Struts2 application but it always throw the following exception:</p> <pre><code>java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter </code></pre> <p>I have followed the step by step tutorial in <a href="http://struts.apache.org/development/2.x/docs/create-struts-2-web-application-using-maven-to-manage-artifacts-and-to-build-the-application.html" rel="nofollow">http://struts.apache.org/development/2.x/docs/create-struts-2-web-application-using-maven-to-manage-artifacts-and-to-build-the-application.html</a> but I cannot make it work. I also managed to find other Struts2 tutorial which uses maven but all failed. It throws the same exception when I try to run the application.</p> <p>I used the following:</p> <ul> <li>Eclipse </li> <li>Maven</li> <li>Tomcat</li> <li>Struts2</li> </ul> <p>According to other discussions, the dependencies jar files(e.g. struts2-core) must be put on the lib folder but as for me, I am using Maven so all the dependencies are already included in my build path under Maven Dependencies.</p> <p>I even tried running the sample project given in Struts2 website (<a href="https://code.google.com/p/struts2-examples/downloads/detail?name=Basic_Struts_2_Maven_2_3_1_2.zip&amp;can=2&amp;q=" rel="nofollow">Basic_Struts_2_Maven_2_3_1_2.zip</a>) but I still have no luck. Building it is successful but running it on server always fail. </p> <p>Am I missing anything?</p> <p><strong>Here's the <code>web.xml</code>:</strong></p> <pre class="lang-xml prettyprint-override"><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"&gt; &lt;display-name&gt;Basic_Struts2_Maven&lt;/display-name&gt; &lt;welcome-file-list&gt; &lt;welcome-file&gt;index.jsp&lt;/welcome-file&gt; &lt;/welcome-file-list&gt; &lt;filter&gt; &lt;filter-name&gt;struts2&lt;/filter-name&gt; &lt;filter-class&gt;org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter&lt;/filter-class&gt; &lt;/filter&gt; &lt;filter-mapping&gt; &lt;filter-name&gt;struts2&lt;/filter-name&gt; &lt;url-pattern&gt;/*&lt;/url-pattern&gt; &lt;/filter-mapping&gt; &lt;/web-app&gt; </code></pre> <p><strong><code>pom.xml</code>:</strong></p> <pre class="lang-xml prettyprint-override"><code>&lt;project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"&gt; &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt; &lt;groupId&gt;manning&lt;/groupId&gt; &lt;artifactId&gt;Basic_Struts2_Mvn&lt;/artifactId&gt; &lt;packaging&gt;war&lt;/packaging&gt; &lt;version&gt;0.0.1-SNAPSHOT&lt;/version&gt; &lt;name&gt;Basic Struts 2&lt;/name&gt; &lt;properties&gt; &lt;project.build.sourceEncoding&gt;UTF-8&lt;/project.build.sourceEncoding&gt; &lt;/properties&gt; &lt;build&gt; &lt;finalName&gt;Basic_Struts2_Mvn&lt;/finalName&gt; &lt;plugins&gt; &lt;plugin&gt; &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt; &lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt; &lt;version&gt;2.3.2&lt;/version&gt; &lt;configuration&gt; &lt;source&gt;1.6&lt;/source&gt; &lt;target&gt;1.6&lt;/target&gt; &lt;/configuration&gt; &lt;/plugin&gt; &lt;/plugins&gt; &lt;/build&gt; &lt;dependencies&gt; &lt;dependency&gt; &lt;groupId&gt;org.apache.struts&lt;/groupId&gt; &lt;artifactId&gt;struts2-core&lt;/artifactId&gt; &lt;version&gt;2.3.1.2&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;log4j&lt;/groupId&gt; &lt;artifactId&gt;log4j&lt;/artifactId&gt; &lt;version&gt;1.2.14&lt;/version&gt; &lt;/dependency&gt; &lt;/dependencies&gt; &lt;/project&gt; </code></pre> <p><strong><code>struts.xml</code>:</strong></p> <pre class="lang-xml prettyprint-override"><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"&gt; &lt;struts&gt; &lt;constant name="struts.devMode" value="true" /&gt; &lt;package name="basicstruts2" extends="struts-default"&gt; &lt;action name="index"&gt; &lt;result&gt;/index.jsp&lt;/result&gt; &lt;/action&gt; &lt;/package&gt; &lt;/struts&gt; </code></pre> <p><strong><code>.classpath</code>:</strong></p> <pre class="lang-xml prettyprint-override"><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;classpath&gt; &lt;classpathentry kind="src" output="target/classes" path="src/main/java"/&gt; &lt;classpathentry excluding="**" kind="src" output="target/classes" path="src/main/resources"/&gt; &lt;classpathentry kind="src" output="target/test-classes" path="src/test/java"/&gt; &lt;classpathentry excluding="**" kind="src" output="target/test-classes" path="src/test/resources"/&gt; &lt;classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5"/&gt; &lt;classpathentry kind="con" path="org.maven.ide.eclipse.MAVEN2_CLASSPATH_CONTAINER"/&gt; &lt;classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.web.container"/&gt; &lt;classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.module.container"/&gt; &lt;classpathentry kind="output" path="target/classes"/&gt; &lt;/classpath&gt; </code></pre>
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