Struts2 Hello World jsp example error

java jsp struts2 tomcat6

10,649

Solution 1

Just add the following Jars only in the WEB-INF/lib. Remove all related jars if you don't have need.

asm-3.3.jar
asm-commons-3.3.jar
asm-tree-3.3.jar
commons-fileupload-1.2.2.jar
commons-io-2.0.1.jar
commons-lang3-3.1.jar
freemarker-2.3.19.jar
javaassist-3.11.0.GA.jar
ognl-3.0.5.jar
struts2-core-2.3.7.jar
xwork-core-2.3.7.jar

If you dont have these jars then download it.

Here org.apache.struts2.dispatcher.FilterDispatcher is now deprecated .So Edit your web.xml from

<?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>Struts 2</display-name>
  <welcome-file-list>
  <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <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>
</web-app>

<?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_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>Struts2 Application</display-name>

  <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</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>

I guess this could do the work for you.

Solution 2

It seems the version of xwork-core jar that you are using is not compatible with the versions of other jars.

Try using xwork-2.1.2.jar. I have used it earlier successfully.

If it still does not work, be sure you use the same versions of each and every jar as in the sample application.

EDIT:

As per your code, try changing

public String execute() throws Exception {
  return "success";
}

public String execute() throws Exception {
  setName("Honey Bunny");
  return "success";
}

It seems that since you have not called the setter, Struts is searching for the property name in the session.

10,649

Author by

lulu88

Girl developer! From beautiful Cape Town in South Africa :)

Updated on June 04, 2022

Comments

lulu88 almost 2 years

I am trying to run a Hello World Struts2 project in Tomcat 6.

I keep getting:

  root cause: java.lang.ClassNotFoundException: org.apache.struts2.interceptor.SessionAware

  java.lang.NoClassDefFoundError: org/apache/struts2/interceptor/SessionAware
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
    at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1374)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
    at com.opensymphony.xwork2.util.ClassLoaderUtil.loadClass(ClassLoaderUtil.java:138)
    at com.opensymphony.xwork2.ObjectFactory.getClassInstance(ObjectFactory.java:96)
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.verifyAction(XmlConfigurationProvider.java:398)
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addAction(XmlConfigurationProvider.java:355)
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:460)
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:265)
    at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:111)
    at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:189)
    at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)
    at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:360)
    at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:403)
    at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:190)

However I do have the required jars for struts2 in the WEB-INF/lib folder for the project.

Jars:

struts-core xwork ognl freemarker commons-fileupload commons-io commons-lang

Any ideas?

I followed an online Struts2 HelloWorld example:

HelloWorld.action class:

  package za.co.vine.tutorialspoint.struts2;

  public class HelloWorldAction{
  private String name;

  public String execute() throws Exception {
  return "success";
  }

  public String getName() {
  return name;
  }

  public void setName(String name) {
  this.name = name;
  }
  }

HelloWorld.jsp:

  <%@ page contentType="text/html; charset=UTF-8" %>
  <%@ taglib prefix="s" uri="/struts-tags" %>
  <html>
  <head>
  <title>Hello World</title>
  </head>
  <body>
     Hello World, <s:property value="name"/>
  </body>
  </html>

index.jsp:

  <%@ page language="java" contentType="text/html; charset=ISO-8859-1"
   pageEncoding="ISO-8859-1"%>
  <%@ taglib prefix="s" uri="/struts-tags"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
  "http://www.w3.org/TR/html4/loose.dtd">
  <html>
  <head>
  <title>Hello World</title>
  </head>
  <body>
     <h1>Hello World From Struts2</h1>
      <form action="hello">
        <label for="name">Please enter your name</label><br/>
        <input type="text" name="name"/>
        <input type="submit" value="Say Hello"/>
     </form>
  </body>
  </html>

struts.xml:

  <?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.devMode" value="true" />
    <package name="helloworld" extends="struts-default">

     <action name="hello" 
        class="za.co.vine.tutorialspoint.struts2.HelloWorldAction" 
        method="execute">
        <result name="success">/HelloWorld.jsp</result>
     </action>
  </package>
  </struts>

web.xml:

  <?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>Struts 2</display-name>
  <welcome-file-list>
  <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <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>
</web-app>

lulu88 over 11 years

Thanks for your reply :) I downloaded the full struts 2.3.8 package from Apache, but still don't work. I get a aused by: java.lang.ClassNotFoundException: org.apache.struts2.views.gxp.inject.InjectedObjectContainer at org.apache.catalina.loader.WebappClassLoader.loadClass(Webap‌pClassLoader.java:13‌87) at com.opensymphony.xwork2.util.ClassLoaderUtil.loadClass(Class‌LoaderUtil.java:152)‌at com.opensymphony.xwork2.config.providers.XmlConfigurationPro‌vider.register(XmlCo‌nfigurationProvider.‌java:216) struts-core 2.3.8.jar xwork-core-2.3.8.jar
TechSpellBound over 11 years

Edit the question to add the code from struts.xml, view.jsp, action class. Then we'll be able to tell.
TechSpellBound over 11 years

Since you are trying to use the latest version of Struts, there might be dependency issues. Start afresh as try this app: dzone.com/tutorials/java/struts-2/struts-2-example/…
lulu88 over 11 years

Followed that D-Zone example and in my tomcat logs i still get an error: code java.lang.ClassNotFoundException: org.apache.struts2.interceptor.SessionAware
lulu88 over 11 years

Did that. I get this error in my tomcat logs: java.lang.ClassNotFoundException: org.apache.struts2.interceptor.SessionAware
TechSpellBound over 11 years

Did you take this example with all the jars inside it: www.dzone.com/sites/all/files/Example1_1.zip Also, how do you add the jars to the project. If you are using Eclipse, select all jars -> right click -> Add to build path..
TechSpellBound over 11 years

Probably, you have to run the Dzone example on tomcat 5.5. If that still does not work, try arvin_codeHunk's example below
lulu88 over 11 years

Yeah i did, i finally got it to work on tomcat 6! But I had to remove the lib folder from the project itself and put the jars i need in tomcat lib folder.
TechSpellBound over 11 years

If you don't realize the proper location of jars, "select all jars -> right click -> Add to build path" always helps
Java Nerd almost 9 years

Thanks for helping us! we are beginners and guys like you are really helping us. I am learning Struts2 by my own and facing the same problem as OP