Login Logout Example Using Struts 2

Hi all , welcome to our blog , and today we will learn code for Login Logout Example Using Struts 2 :

Step 1 : download struts jar :

visit : https://struts.apache.org/download.cgi , here I am downloading Struts 2.5.32 jars , you can download any other latest one if this is not available in future.

under Essential Dependencies Only:
download zip file : struts-2.5.32-min-lib.zip.

Step 2 : download tomcat :

https://archive.apache.org/dist/tomcat/tomcat-8/v8.0.45/bin/ download apache-tomcat-8.0.45.exe and install it in your local.

Step 3 : create dynamic web project in Eclipse :

File – > New – > Dynamic Web Project

name : LoginLogoutExample

click Next — > Next —> select Generate web.xml as below and click on Finish :

Add tomcat server to eclipse , and then right click on project –> Properties –> Java Build Path –> Libraries –> Add External Jars –> and select all struts jars which we downloaded earlier as in Step 1 –> Apply –> close.

again right click on project –> Properties –> Deployment Assembly –> Add –> Select Java Build Path Entries –> click Next –> Select All Jars and Finish –> Apply –> Apply and close.

Now inside webapp folder we have to create two files : login.jsp and welcome.jsp :

1.login.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<h2>Login</h2>
	<s:form action="login" method="post">
		<s:textfield name="username" label="Username" />
		<s:password name="password" label="Password" />
		<s:submit value="Login" />
	</s:form>
	<s:fielderror />
</body>
</html>

2.welcome.jsp

<!DOCTYPE html>
  <%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
    <title>Welcome Page</title>
</head>
<body>
    <h2>Welcome, <s:property value="username" /></h2>
    <p><a href="logout">Logout</a></p>
</body>
</html>

modify web.xml file as below :

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://xmlns.jcp.org/xml/ns/javaee"
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
	id="WebApp_ID" version="3.1">
	<display-name>LoginLogoutExample</display-name>
	<welcome-file-list>
		<welcome-file>login.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>

In above web.xml file we configured Front-Controller StrutsPrepareAndExecuteFilter and welcome file as login.jsp

In src/main/java create LoginAction class as below :

LoginAction.java

import com.opensymphony.xwork2.ActionSupport;

@SuppressWarnings("serial")
public class LoginAction extends ActionSupport {
    private String username;
    private String password;

    public String execute() {
        // Check if username and password are hardcoded correctly
        if ("admin".equals(username) && "password".equals(password)) {
            return SUCCESS;
        } else {
            addActionError("Invalid username or password");
            return ERROR;
        }
    }

    public String logout() {
        // Perform logout logic here if needed
        return SUCCESS;
    }

    // Getter and Setter methods for username and 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;
    }
}

In WEB-INF folder create a folder with name classes and in this folder we have to add our struts.xml configuration file :

struts.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
   "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
   "http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
	<package name="test" namespace="/" extends="struts-default">
		<action name="login" class="LoginAction">
			<result name="success">/welcome.jsp</result>
			<result name="error">/login.jsp</result>
		</action>
		<action name="logout" class="LoginAction"
			method="logout">
			<result>/login.jsp</result>
		</action>
	</package>
</struts>

Our Project structure in Eclipse will look like this :