Struts Hello World Example in Eclipse

create a Struts hello world application in eclipse.

 First create a new project, go to File->New and select DynamicWebProject.

Enter the project name and click the Finish button.
Add the following jar files to the WEB-INF\lib directory.
Right click the src folder and select New->Package.
Enter the package name as com.vaannila.form and click Finish.
Now right click the newly created package and select New->Class.
Enter the class name as HelloWorldForm and the superclass name asorg.apache.struts.action.ActionForm and click Finish.
In the HelloWorldForm class add the following code.
view source

print?

01.package com.vaannila.form;
02. 
03.import org.apache.struts.action.ActionForm;
04. 
05.public class HelloWorldForm extends ActionForm {
06. 
07.private static final long serialVersionUID = -473562596852452021L;
08. 
09.private String message;
10. 
11.public String getMessage() {
12.return message;
13.}
14. 
15.public void setMessage(String message) {
16.this.message = message;
17.}
18.}
In the same way create a new package com.vaannila.action and create a HelloWorldAction class extending org.apache.struts.action.Action. Add the following code to the action class and save it.
view source

print?

01.package com.vaannila.action;
02. 
03.import javax.servlet.http.HttpServletRequest;
04.import javax.servlet.http.HttpServletResponse;
05. 
06.import org.apache.struts.action.Action;
07.import org.apache.struts.action.ActionForm;
08.import org.apache.struts.action.ActionForward;
09.import org.apache.struts.action.ActionMapping;
10. 
11.import com.vaannila.form.HelloWorldForm;
12. 
13.public class HelloWorldAction extends Action {
14. 
15.@Override
16.public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)throws Exception {
17.HelloWorldForm hwForm = (HelloWorldForm) form;
18.hwForm.setMessage("Hello World");
19.return mapping.findForward("success");
20.}
21.}
Here we typecast the ActionForm to HelloWorldForm and set the message value.
Add the following entries in the struts-config.xml file.
view source

print?

01.<?xml version="1.0" encoding="ISO-8859-1" ?>
02. 
03.<!DOCTYPE struts-config PUBLIC
04."-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"
06. 
07.<struts-config>
08. 
09.<form-beans>
10.<form-bean name="helloWorldForm"type="com.vaannila.form.HelloWorldForm"/>
11.</form-beans>
12. 
13.<global-forwards>
14.<forward name="helloWorld" path="/helloWorld.do"/>
15.</global-forwards>
16. 
17.<action-mappings>
18.<action path="/helloWorld"type="com.vaannila.action.HelloWorldAction"name="helloWorldForm">
19.<forward name="success" path="/helloWorld.jsp" />
20.</action>
21.</action-mappings>
22. 
23.</struts-config>
Now configure the deployment descriptor. Add the following configuration information in the web.xmlfile.
view source

print?

01.<?xml version="1.0" encoding="UTF-8"?>
03.<display-name>StrutsExample1</display-name>
04. 
05.<servlet>
06.<servlet-name>action</servlet-name>
07.<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
08.<init-param>
09.<param-name>config</param-name>
10.<param-value>/WEB-INF/struts-config.xml</param-value>
11.</init-param>
12.<load-on-startup>2</load-on-startup>
13.</servlet>
14. 
15.<servlet-mapping>
16.<servlet-name>action</servlet-name>
17.<url-pattern>*.do</url-pattern>
18.</servlet-mapping>
19. 
20.<welcome-file-list>
21.<welcome-file>index.jsp</welcome-file>
22.</welcome-file-list>
23.</web-app>
When we run the application the index.jsp page will be executed first. In the index.jsp page we redirect the request to the helloWorld.do URI, which inturn invokes the HelloWorldAction.
vi
1.<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>
2.<logic:redirect forward="helloWorld"/>
In the action class we return the ActionForward “success” which is mapped to the helloWorld.jsp page. In the helloWorld.jsp page we display the “Hello World” message.
view source

print?

01.<%@taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
02.<html>
03.<head>
04.<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
05.<title>Hello World</title>
06.</head>
07.<body>
08.<bean:write name="helloWorldForm" property="message"/>
09.</body>
10.</html>
After creating all the files the directory structure of the application looks like this.
On executing the application the “Hello World” message gets displayed to the user.
You can download the source code of this example by clicking on the Download link below.
Source: Download
War: Download
Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: