Spring 3 MVC hello world example from:(mkyong.com)
Before you start this Spring 3 MVC tutorial, please refer to this new features in spring3 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 :
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
<properties> <spring.version>3.0.5.RELEASE</spring.version> </properties> <dependencies> <!-- Spring 3 dependencies --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> </dependencies> </project>
2. Controller & Mapping
In Spring 3, annotation is widely adapted in everywhere. The@RequestMappingis available since 2.5, but now enhanced to support 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
<beans 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"> <context:component-scan base-package="com.mkyong.common.controller" /> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix"> <value>/WEB-INF/pages/</value> </property> <property name="suffix"> <value>.jsp</value> </property> </bean> </beans>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
<web-app 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"> <display-name>Spring MVC Application</display-name> <servlet> <servlet-name>mvc-dispatcher</servlet-name> <servlet-class> org.springframework.web.servlet.DispatcherServlet </servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>mvc-dispatcher</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/mvc-dispatcher-servlet.xml</param-value> </context-param> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> </web-app>6. Demo
URL : http://localhost:8080/SpringMVC/welcome
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