when trying to run struts2 with eclipse juno server,getting HTTP Status 404 error

Question

This is the error i am getting on my eclipse server page:

There is no Action mapped for namespace [/] and action name [trial] associated with context path [/StrutsTrial6].

This is my web.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_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>StrutsTrial6</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.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  <filter-mapping>
  <filter-name>struts2</filter-name>
  <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

This is my struts.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<struts>
<package name="default" extends="struts-default">
<action name="trial" namespace="/" class="first.FirstBean">
<result name="success">/first.jsp</result>
</action>
</package>
</struts>

This is my input jsp page:

<%@ taglib uri="/struts-tags" prefix="s" %>
<s:form action="trial">
<s:textfield name="name" label="NAME"></s:textfield>
<s:submit value="save"></s:submit>
</s:form>

This is my output jsp page:

<%@ taglib uri="/struts-tags" prefix="s" %>
name:<s:property value="name"/>

This is pom.xml file:

<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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>StrutsTrial6</groupId>
  <artifactId>StrutsTrial6</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <dependencies>
    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.3.2</version>
    </dependency>
    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.4</version>
    </dependency>
    <dependency>
      <groupId>commons-lang</groupId>
      <artifactId>commons-lang</artifactId>
      <version>2.4</version>
    </dependency>
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-lang3</artifactId>
      <version>3.4</version>
    </dependency>
    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.1.3</version>
    </dependency>
    <dependency>
      <groupId>org.freemarker</groupId>
      <artifactId>freemarker</artifactId>
      <version>2.3.23</version>
    </dependency>
    <dependency>
      <groupId>org.javassist</groupId>
      <artifactId>javassist</artifactId>
      <version>3.20.0-GA</version>
    </dependency>
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-api</artifactId>
      <version>2.7</version>
    </dependency>
    <dependency>
      <groupId>ognl</groupId>
      <artifactId>ognl</artifactId>
      <version>3.1.12</version>
    </dependency>
    <dependency>
      <groupId>org.apache.struts</groupId>
      <artifactId>struts2-core</artifactId>
      <version>2.5.10.1</version>
    </dependency>
    <dependency>
      <groupId>org.apache.tomcat</groupId>
      <artifactId>tomcat-servlet-api</artifactId>
      <version>7.0.56</version>
    </dependency>
  </dependencies>
  <build>
    <sourceDirectory>src</sourceDirectory>
    <plugins>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.3</version>
        <configuration>
          <warSourceDirectory>WebContent</warSourceDirectory>
          <failOnMissingWebXml>false</failOnMissingWebXml>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

I've been stuck with this error from past 10 hours. I've also found that sometimes, when I am changing some code in my project, Eclipse server does not update my project and instead it runs my earlier code, so please tell me why my eclipse is showing such a srange behaviour.Thanks in advance..

This is the Screenshot of Config Browser page:

This is the same page i am getting whether i am using namespace="/" in package or not using namespace , and in this page their is no action defined in Actions in Default column.

Answer 1

To debug this kind of problems:

Add this

<dependency>
    <groupId>org.apache.struts</groupId>
    <artifactId>struts2-config-browser-plugin</artifactId>
    <version>2.5.10.1</version>
</dependency>

to your pom.xml, deploy, then open the following URL:

http://localhost:8080/YOUR_PROJECT_NAME/config-browser/index.action

and discover how your actions are mapped as described here .

IMPORTANT: remember to remove it before going to production, or it will be a serious security flaw.

---

Your specific problem(s):

1. Syntax errors on struts.xml:

    <package name="default" extends="struts-default"> <action name="trial" namespace="/" class="first.FirstBean"> <result name="success">/first.jsp</result> </action> </package> 

   <action> has no namespace attribute, <package> does:

    <package name="default" extends="struts-default" namespace="/" > <action name="trial" class="first.FirstBean"> <result name="success">/first.jsp</result> </action> </package> 

   _{NOTE: don't call an Action FirstBean , since actions are not beans, actions should contain beans and expose them through getters and setters. Actions are controllers and part of the model , not just model (like a bean would be).}

2. You were not hitting the syntax errors because you're not reading the struts.xml . It is in WEB-INF , but it should stay on the root of the classpath, hence in src/main/resources , that at build time will be copied by Maven into WEB-INF/classes

Also note that WebContent/WEB-INF is not the default Maven structure generated by archetypes, which should be src/main/webapp/WEB-INF ...

You would have never hit any of this errors if you'd have started from a maven archetype for the generation of your project (that instead you did manually, or with Eclipse, both discouraged ways ;)