Sunday, October 27, 2013

Spring 3 MVC Hello World Example

Posted on August 2, 2011 , Last modified : August 29, 2012

Before you start this Spring 3 MVC tutorial, please refer to this new features in Spring 3 documentation, so that you have a brief idea of what’s new in Spring 3.

In this tutorial, we show you how to develop a Spring 3 MVC hello world example.

Technologies used :

Spring 3.0.5.RELEASE
JDK 1.6
Maven 3
Eclipse 3.6

1. Project Dependency

In Spring 3 @MVC, declares following dependencies in your Maven pom.xml file.

 
  3.0.5.RELEASE

org.springframework spring-core ${spring.version} org.springframework spring-web ${spring.version} org.springframework spring-webmvc ${spring.version}

2. Controller & Mapping

In Spring 3, annotation is widely adapted in everywhere. The @RequestMapping is available since 2.5, but now enhanced tosupport REST style URLs in Spring MVC.

package com.mkyong.common.controller;
 
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
 
@Controller
@RequestMapping("/welcome")
public class HelloController {
 
 @RequestMapping(method = RequestMethod.GET)
 public String printWelcome(ModelMap model) {
 
  model.addAttribute("message", "Spring 3 MVC Hello World");
  return "hello";
 
 }
 
}

3. JSP Views

A JSP page to display the value.

File : hello.jsp

<html>
<body>
 <h1>Message : ${message}</h1> 
</body>
</html>

4. Spring Configuration

In Spring 3, you still need to enable “auto component scanning” (for controller) and declares “view resolver” manually.

File : mvc-dispatcher-servlet.xml

 xmlns="http://www.springframework.org/schema/beans"
 xmlns:context="http://www.springframework.org/schema/context"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="
        http://www.springframework.org/schema/beans     
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-3.0.xsd">
 
  base-package="com.mkyong.common.controller" />
 
 
  class="org.springframework.web.servlet.view.InternalResourceViewResolver">
   name="prefix">
   /WEB-INF/pages/

name="suffix"> .jsp

5. Integrate Web application with Spring

Integration is no different if compare with old Spring 2.5.6, just declares Spring “ContextLoaderListener” and “DispatcherServlet“.

File : web.xml

 id="WebApp_ID" version="2.4"
 xmlns="http://java.sun.com/xml/ns/j2ee" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
 http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
 
 Spring MVC Application

mvc-dispatcher

org.springframework.web.servlet.DispatcherServlet

mvc-dispatcher

contextConfigLocation

/WEB-INF/mvc-dispatcher-servlet.xml

org.springframework.web.context.ContextLoaderListener

6. Demo

URL : http://localhost:8080/SpringMVC/welcome

Download Source Code

Download it – Spring3-MVC-HelloWorld-Example.zip (7 KB)

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