Struts Framework

Login Form with Session in Struts 2

Create Maven Project

On the Eclipse, create a Maven project

Click Next button and select Workspace location for project

Click Next button and select maven-archetype-webapp

Click Next button and enter Project Information:

  • GroupId: LearnStrutsFrameworkWithRealApps
  • Artifact Id: LearnStrutsFrameworkWithRealApps
  • Package: com.demo

Click Finish button to finish create Maven project




Add Tomcat Server

Select current project, Right click and select Properties menu. In Properties dialog, select Targeted Runtime in left side after select Tomcat server from server list in right side

Click Ok button to finish

Add JRE System Library

Select current project, Right click and select Build Path\Configure Build Path menu Select JRE System Library in Libraries tab:

Click Edit button and select JRE System Library you need use as below:

Click Finish button to finish




Configure pom.xml

Open pom.xml file and add configurations for Struts 2 as below:

<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">
	<modelVersion>4.0.0</modelVersion>
	<groupId>LearnStrutsFrameworkWithRealApps</groupId>
	<artifactId>LearnStrutsFrameworkWithRealApps</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>LearnStrutsFrameworkWithRealApps Maven Webapp</name>
	<url>http://maven.apache.org</url>
	<dependencies>

		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>javax.servlet.jsp.jstl</groupId>
			<artifactId>javax.servlet.jsp.jstl-api</artifactId>
			<version>1.2.1</version>
		</dependency>

		<dependency>
			<groupId>taglibs</groupId>
			<artifactId>standard</artifactId>
			<version>1.1.2</version>
		</dependency>

		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>3.1.0</version>
			<scope>provided</scope>
		</dependency>

		<!-- Struts 2 Framework -->

		<dependency>
			<groupId>org.apache.struts</groupId>
			<artifactId>struts2-core</artifactId>
			<version>2.5.20</version>
		</dependency>

		<dependency>
			<groupId>org.apache.struts</groupId>
			<artifactId>struts2-convention-plugin</artifactId>
			<version>2.5.20</version>
		</dependency>

	</dependencies>

	<build>
		<finalName>LearnStrutsFrameworkWithRealApps</finalName>
	</build>

</project>




Configure web.xml

Open web.xml file in src\main\webapp\WEB-INF folder and add configurations for Struts 2 as below:

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
		 http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
	version="3.1">

	<display-name>Learn Struts 2 Framework with Real Apps</display-name>

	<filter>
		<filter-name>struts2</filter-name>
		<filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
		<init-param>
			<param-name>struts.devMode</param-name>
			<param-value>true</param-value>
		</init-param>
		<init-param>
			<param-name>struts.action.extension</param-name>
			<param-value>html</param-value>
		</init-param>
	</filter>

	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>/*</url-pattern>
		<dispatcher>REQUEST</dispatcher>
		<dispatcher>FORWARD</dispatcher>
		<dispatcher>INCLUDE</dispatcher>
	</filter-mapping>

	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>

</web-app>

Entities Class

Create new package named entities. In this package, create new java class named Account.java as below:

package entities;

public class Account {

	private String username;
	private String password;

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getPassword() {
		return password;
	}

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

}




Create Account Action

Create new package named controllers.action in src/main/java folder. The action class in Struts 2 must be put in a package named action. In this package, create new java class named AccountAction.java as below: 

package controllers.action;

import java.util.Map;

import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Namespace;
import org.apache.struts2.convention.annotation.Result;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

import entities.Account;

@Namespace("/account")
public class AccountAction extends ActionSupport {

	private static final long serialVersionUID = 1L;

	private String errorMessage = "";
	private Account account;

	public String getErrorMessage() {
		return errorMessage;
	}

	public void setErrorMessage(String errorMessage) {
		this.errorMessage = errorMessage;
	}

	public Account getAccount() {
		return account;
	}

	public void setAccount(Account account) {
		this.account = account;
	}

	@Action(value = "index", results = {
		@Result(name = SUCCESS, location = "/WEB-INF/views/account/index.jsp")
	})
	public String index() {
		this.account = new Account();
		return SUCCESS;
	}

	@Action(value = "login", results = {
		@Result(name = SUCCESS, location = "/WEB-INF/views/account/welcome.jsp"),
		@Result(name = ERROR, location = "/WEB-INF/views/account/index.jsp")
	})
	public String login() {
		if (this.account.getUsername().equalsIgnoreCase("acc1") && this.account.getPassword().equalsIgnoreCase("abc")) {
			Map<String, Object> session = ActionContext.getContext().getSession();
			session.put("username", this.account.getUsername());
			return SUCCESS;
		} else {
			this.errorMessage = "Invalid Account";
			return ERROR;
		}
	}

	@Action(value = "logout", results = {
		@Result(name = SUCCESS, type = "redirectAction", params = { "namespace", "/account", "actionName", "index" })
	})
	public String logout() {
		Map<String, Object> session = ActionContext.getContext().getSession();
		session.remove("username");
		return SUCCESS;
	}

}




Create Views

Create new folder named views in src\main\webapp\WEB-INF folder. In views folder, create new folder named account. In account folder create new views as below:

Index View

In account folder create new JSP file named index.jsp as below: 

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
	pageEncoding="ISO-8859-1" isELIgnored="false"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Learn Struts 2 with Real Apps</title>
</head>
<body>

	<h3>Login</h3>
	${errorMessage }
	<s:form method="post" namespace="/account" action="login">
		<s:textfield label="Username" name="account.username"></s:textfield>
		<s:password label="Password" name="account.password"></s:password>
		<s:submit value="Login" align="left"></s:submit>
	</s:form>

</body>
</html>

Welcome View

In account folder, create new JSP file named welcome.jsp as below: 

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
	pageEncoding="ISO-8859-1" isELIgnored="false"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Learn Struts 2 with Real Apps</title>
</head>
<body>

	<h3>Welcome</h3>
	Welcome ${sessionScope.username }
	<br>
	<s:a namespace="/account" action="logout">Logout</s:a>

</body>
</html>




Create Redirect Page

Create new jsp file named index.jsp in src\main\webapp folder as below: 

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<jsp:forward page="account/index.html"></jsp:forward>

Structure of Project




Run Application

Select project, right click and select Run on Server menu

Access index method in account action with following url:

http://localhost:8080/LearnStrutsFrameworkWithRealApps/account/index.html

Output

Test with invalid account is username: acc2 and password: 123

Test with valid account is username: acc1 and password: abc

Click logout link from success page to remove session and open login page again

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