In this tutorial ,we will create the Struts 2.0 Login Application. This is the simple application to develop in Struts2.0 framework. Struts 2.0 framework provide the facilities to develop web application in java platform. If  we are run this Struts 2.0 Login Example ,first create following file in MyEclipse or Eclipse IDE.
index.jsp
web.xml
stryts.xml
LoginAction.java
hello.jsp
relogin.jsp
Login Example using Struts 2.0 the following tool are required for run this example
JDK 1.5
MyEclipse IDE or Eclipse IDE
Server Tomcat 6.0
Struts 2.0 jar file
Directory Structure of Login Example in Struts 2.0 Using MyEclipse or Eclipse IDE

     MyEclipse Ditectory                         Eclipse Directory

       

 
Step(1):-Open your MyEclipse or Eclipse IDE ,create work space in your application store.
Step(2):-Select web project ,File>New>Webproject write Project name.
Step(3):-Add the capability of struts 2.0 MyEclipse>Add Capability>Add Struts Capability
Step(4):-Choose radio button version of struts 2.0 and click finish than see your project directory structure add the all struts 2.0 jar file.
Step(5):-First you create index.jsp file in WebRoot folder in MyEclipse IDE application directory structure and write the following code:-

index.jsp

<%@taglib uri="/struts-tags" prefix="s"%>

<s:form action="login">
<s:textfield name="name" label="Name"/>
<s:password name="password" label="Password"/>
<s:submit value="Login"/>
</s:form>

Step(6):-web.xml file are default created in your project at the time of add capability of struts2.0 in MyEclipse IDE ,If you are use Eclipse IDE then copy the following code and paste in web.xml file you create in application directory structure.

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  
  <filter>
  <filter-name>f1</filter-name>
  <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
  </filter>
  <filter-mapping>
  <filter-name>f1</filter-name>
  <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

Step(7):-This step you create struts configuration file this file name is struts.xml ,which are contain all information send by user and this request in which action class are invoked , if your action class contain more then one method than configure in this file and your request is process successfully then configure this string return by the action class which jsp page are open. The struts.xml page contain all information which send by user and string return by action class and also contain the information of interceptor if you want to add in your project. The struts 2.0 Login example you create this file and write following code

struts.xml

<!DOCTYPE struts PUBLIC 
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="demo" extends="struts-default">
<action name="login" class="mypack.LoginAction">
<result name="success">/hello.jsp</result>
<result name="failure">/relogin.jsp</result>
</action>
</package>
</struts>

Step(8):-In this step your create action class , it means that index page form tag you sent this action then go in struts.xml file and read this request in which action class are mapped then go in action class which are mapped in struts.xml file and process the request or your business logic if process are success then return success string and not success then return error string. In struts 2.0 Login example the following action class return the success string if login user name start alpha bate "a" and password start alpha bate "b" else return the string failure in execute method ,write this following code in your action class

LoginAction.java

package mypack;
public class LoginAction {
	private String name,password;
	public String execute(){
		if(name.startsWith("a")&&password.startsWith("b"))
			return "success";
		else
			return "failure";
	}

	public String getName() {
		return name;
	}

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

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
		}

}

Step(9):-In this step the action class return string then check the configuration file which jsp page are mapped for result ,it means presentation logic and we want to show data which are store in action class use in result jsp page in property tag ,this tag provide struts 2.0 tag library to fetch data which are store in value stack . The struts 2.0 Login example create hello.jsp page and write the following code.

hello.jsp

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

Step(10):-In this step the action class return string failure which are mapped in struts.xml file ,if login user name and password are wrong then action class return failure string in this string mapped result page name is relogin.jsp. The following code are write in your relogin jsp page

relogin.jsp

<b>Invalid UserName and Password !</b>
<jsp:include page="index.jsp"/>

Step(11):-Configure the tomcat server in your myeclipse IDE and start the server or open in your browser.
Step(12):-Deploy your project on the tomcat server and see on your browser then create following output

Output





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