Spring MVC for beginner to expert

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Spring MVC Using web.xml and codedixa-servlet.xml file

Project Structure

web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
	<display-name>Archetype Created Web Application</display-name>


	<servlet>
		<servlet-name>codedixa</servlet-name>
		<servlet-class>
			org.springframework.web.servlet.DispatcherServlet
		</servlet-class>
	</servlet>
	<servlet-mapping>
		<servlet-name>codedixa</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
</web-app>

codedixa-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:ctx="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd">
<ctx:annotation-config></ctx:annotation-config>
<ctx:component-scan base-package="com.codedixa"></ctx:component-scan>
</beans>

pom.xml (Project Object Model)

<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>com.codedixa</groupId>
	<artifactId>DemoMVC</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>DemoMVC 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</groupId>
			<artifactId>servlet-api</artifactId>
			<version>2.5</version>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>4.1.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>4.1.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.36</version>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
	</dependencies>
	<build>
		<finalName>DemoMVC</finalName>
	</build>
</project>

AddController.java (Controller)

package com.codedixa;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/*
Author:Gaurav Dixit
*/

@Controller
public class AddController {
	@RequestMapping("/add")
	public ModelAndView add(HttpServletRequest req,HttpServletResponse res) {                
                //get request from user
		int i=Integer.parseInt(req.getParameter("t1"));
		int j=Integer.parseInt(req.getParameter("t2"));
		int k=i+j;                
		ModelAndView mv=new ModelAndView();
		mv.setViewName("display.jsp");
		mv.addObject("result",k);
		
		return mv;
	}	
	@RequestMapping("/home")
	public  String home() {
		return "home.jsp";
	}
}

index.jsp (View)

<!--Author: Gaurav Dixit -->
<html>
<body>
<h2>Add two Numbers</h2>
<form action="add">
<input type="text" name="t1"/><br>
<input type="text" name="t2"/><br>
<input type="submit">
</form>
</body>
</html>

display.jsp (View)

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8" isELIgnored="false"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Result Page</title>
</head>
<body>
<h1>The addition Result is</h1>
<%=request.getAttribute("result") %>
<!-- or -->
Result is: ${result}
<!-- for this add isELIgnored="false" -->
</body>
</html>

home.jsp (View)

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>Home Page</h1>
</body>
</html>