Getting started with spring-mvc

Remarks#

This section provides an overview of what spring-mvc is, and why a developer might want to use it.

It should also mention any large subjects within spring-mvc, and link out to the related topics. Since the Documentation for spring-mvc is new, you may need to create initial versions of those related topics.

Versions#

Spring

Version	Release Date
4.3.x	2016-06-10
4.2.x	2015-07-31
4.1.x	2014-09-14
4.0.x	2013-12-12
3.2.x	2012-12-13
3.1.x	2011-12-13
3.0.x	2009-12-17
2.5.x	2007-12-25
2.0.x	2006-10-04
1.2.x	2005-05-13
1.1.x	2004-09-05
1.0.x	2003-03-24

Servlet Spec

Version	Release Date
3.1	2013-05-31
3.0	2009-12-31
2.5	2005-09-30
2.4	2003-11-30
2.3	2001-08-31
2.2	1999-08-31
2.1	1998-11-30
1.0	1997-07-31

First Spring-MVC Project

Create Dynamic Web project, provide following information’s as stated below

Project name : DemoSpringMVCProject
Target runtime : set as Apache Tomcat v7.0 server

Click on finish, successfully we have created dynamic web project.

Now we have to setup Spring-MVC framework :

Create web.xml under ’ WebContent\WEB-INF\ ’ folder

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance" xmlns="https://java.sun.com/xml/ns/javaee" xmlns:web="https://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="https://java.sun.com/xml/ns/javaee https://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>Demo9</display-name>

<servlet>
  <servlet-name>spring</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>

<servlet-mapping>
  <servlet-name>demo</servlet-name>
  <url-pattern>/</url-pattern>
</servlet-mapping>

</web-app>

Where DispatcherServlet class Intercepts incoming request and determines which controller handles the request.
We are going to use servlet-name ’ demo ’ while creating servlet.xml

Create demo-servlet.xml under ’ WebContent\WEB-INF\ ’ folder

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="https://www.springframework.org/schema/beans"
xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
xmlns:context="https://www.springframework.org/schema/context"
xsi:schemaLocation="https://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
    https://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

<context:component-scan base-package="com"></context:component-scan>

<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
 <property name="prefix" value="/WEB-INF/jsp/"></property>
 <property name="suffix" value=".jsp"></property>
</bean>

</beans>

context:component-scan is used scan all controllers defined under ‘com’ package.
ViewResolver Interface

Use to manage mapping between logical and actual views. Predefined implementation of view resolver are available to map the views. Ex: InternalResourceViewResolver, VelocityViewResolver.

To search all jsp pages we have defined prefix which is nothing but setter property , it’s value is set as ‘/WEB-INF/jsp/’( folder path ) . Suffix which is nothing but getter property , it’s value is set as ‘.jsp’ ( search file with an extension .jsp )

Add Required Libraries:

Let us add Spring Framework and common logging API libraries in our project. To do this, right click on your project name DemoSpringMVCProject and then follow the following option available in context menu: Build Path -> Configure Build Path to display the Java Build Path window as follows:

Now use Add External JARs button available under Libraries tab to add the following core JARs from Spring Framework and Common Logging installation directories:

commons-logging-1.1.1
spring-aop-4.1.6.RELEASE
spring-aspects-4.1.6.RELEASE
spring-beans-4.1.6.RELEASE
spring-context-4.1.6.RELEASE
spring-context-support-4.1.6.RELEASE
spring-core-4.1.6.RELEASE
spring-expression-4.1.6.RELEASE
spring-instrument-4.1.6.RELEASE
spring-instrument-tomcat-4.1.6.RELEASE
spring-jdbc-4.1.6.RELEASE
spring-jms-4.1.6.RELEASE
spring-messaging-4.1.6.RELEASE
spring-orm-4.1.6.RELEASE
spring-oxm-4.1.6.RELEASE
spring-test-4.1.6.RELEASE
spring-tx-4.1.6.RELEASE
spring-web-4.1.6.RELEASE
spring-webmvc-4.1.6.RELEASE
spring-webmvc-portlet-4.1.6.RELEASE
spring-websocket-4.1.6.RELEASE

Let’s move towards controller and jsp pages :

Create a com.demo.controller package under src folder.
Create a LoginController class under com.demo.controller package

package com.demo.controller;

import javax.servlet.http.HttpServletRequest; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping;

@Controller public class LoginController {

@RequestMapping(”/”) public String startPage(){ return “login”; }

@RequestMapping(“/signin”) public String handleRequest(HttpServletRequest request){ String name = request.getParameter(“name”); String pass = request.getParameter(“password”); if(name.equals(pass)) { return “welcome”; }else{ return “login”; }
```
}
```
}
Create a login.jsp and welcome.jsp page under ’ WebContent\WEB-INF\jsp\ ’

login.jsp

   <%@ page language="java" contentType="text/html; charset=ISO-8859-1"
   pageEncoding="ISO-8859-1"%>
   <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "https://www.w3.org/TR/html4/loose.dtd">
   <html>
   <head>
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
    <title>Login Page</title>
    </head>
    <body>
      <form action="signin">
          <table>
            <tr>
                <td>User Name : </td>    
                <td><input type="text" name="name" id="name"/> </td>
            </tr> 
            <tr>
                <td>Password: </td>    
                <td><input type="text" name="password"  id="password"/> </td>
            </tr>  
            <tr>
                <td colspan="2"><input type="submit" value="Login"/></td>    
            </tr> 
          </table>
      </form>
    </body>
    </html>

welcome.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "https://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
  <h1> Welcome to Spring MVC !!! </h1>
</body>
</html>

Add DemoSpringMVCProject in localTomcat server and run it on server.