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Thursday, 12 September 2013

Struts 2 Login Form Example

11:46

In this example we will see how to create a simple login page ,validation  and navigation using Struts 2

Environment Used

Java 1.7

Eclipse Juno

Apache Tomcat 7

Struts 2 Jars

1. Create a dynamic web project in Eclipse

Create a Dynamic web project in Eclipse and configure apache tomcat as Server. Once it is created download Struts 2 jars and place in to WEB-INF/lib folder. Here is the final structure of the project. (Click here to download this example with jars)

image

2. Update Web.xml file

Add Struts FilterDispatcher details in to web.xml

<?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>Struts2HelloWorldExample</display-name>
    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
    </welcome-file-list>
</web-app>

3. Create an Action class (LoginAction.java)

package com.pretech;

import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport {
    private String name;
    private String password;
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String execute() {
        if (name.equals("pretech") & password.equals("pretech")) {
            return SUCCESS;
        } else {
            return ERROR;
        }
    }
}

4. Create a loginform (index.jsp)

<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<body>
<s:form action="loginaction">
<s:textfield name="name" label="Enter Username" /><br>
<s:password name="password" label="Enter Password" /><br>
<s:submit value="Submit" align="center" />
</s:form>
</body>
</html>

5. Create a success page (success.jsp)

<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head></head>
<body>
 <h4> You
 <s:property value="name" /> Successfully logged
 </h4>
</body>
</html>

6. Create an error page (error.jsp)

<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head></head>
<body>
 <h4> Login Failed
 </h4>
</body>
</html>

7. Create Struts.xml file

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
    <include file="struts-default.xml"/>
    <package name="com" extends="struts-default">
        <action name="loginaction" class="com.pretech.LoginAction">
            <result name="success">/success.jsp</result>  
                     <result name="error">/error.jsp</result>      
        </action>
    </package>
</struts>

8. Deploy and Run application in Tomcat

Run the application and give your input


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