Spring 4 MVC example with Maven

In this tutorial, we show you a Spring 4 MVC example, using Maven build tool.

Technologies used :

Spring 4.3.0.RELEASE
Maven 3
JDK 1.8
Eclipse Mars.2 Release (4.5.2)
Boostrap 3

1. Project Structure

Download the project source code and review the project folder structure :

2. Maven

A pom.xml template to quick start a Spring MVC project, it defines Spring 4 dependencies and Eclipse workspace configuration.

 <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.b510.hongten</groupId>

     <artifactId>springmvc</artifactId>

     <packaging>war</packaging>

     <version>0.0.1-SNAPSHOT</version>

     <name>springmvc Maven Webapp</name>

     <url>http://maven.apache.org</url>

     <properties>

         <project-name>springmvc</project-name>

         <project-version>0.0.1-SNAPSHOT</project-version>

         <java-version>1.8</java-version>

         <org.springframework-version>4.3.0.RELEASE</org.springframework-version>

     </properties>

     <dependencies>

         <!-- Spring MVC dependency -->

         <dependency>

             <groupId>org.springframework</groupId>

             <artifactId>spring-webmvc</artifactId>

             <version>${org.springframework-version}</version>

         </dependency>

         <dependency>

             <groupId>javax.servlet</groupId>

             <artifactId>javax.servlet-api</artifactId>

             <version>3.0.1</version>

             <scope>provided</scope>

         </dependency>

         <dependency>

             <groupId>javax.servlet</groupId>

             <artifactId>jstl</artifactId>

             <version>1.2</version>

         </dependency>

         <!-- log4j dependency-->

         <dependency>

             <groupId>log4j</groupId>

             <artifactId>log4j</artifactId>

             <version>1.2.17</version>

         </dependency>

     </dependencies>

     <build>

         <finalName>${project-name}-${project-version}</finalName>

         <pluginManagement>

             <plugins>

                 <plugin>

                     <!-- Maven plugin -->

                     <groupId>org.apache.maven.plugins</groupId>

                     <artifactId>maven-compiler-plugin</artifactId>

                     <version>2.3.2</version>

                     <configuration>

                         <source>${java-version}</source>

                         <target>${java-version}</target>

                     </configuration>

                 </plugin>

                 <plugin>

                     <groupId>org.apache.maven.plugins</groupId>

                     <artifactId>maven-war-plugin</artifactId>

                     <version>2.4</version>

                     <configuration>

                         <warSourceDirectory>src/main/webapp</warSourceDirectory>

                         <warName>${project-name}</warName>

                         <failOnMissingWebXml>false</failOnMissingWebXml>

                     </configuration>

                 </plugin>

             </plugins>

         </pluginManagement>

     </build>

 </project>

3. Controller & Mapping

The @RequestMapping has been available since 2.5, but now enhanced to support REST style URLs.

 package com.b510.hongten.demo.web;

 import org.apache.log4j.Logger;

 import org.springframework.stereotype.Controller;

 import org.springframework.ui.Model;

 import org.springframework.web.bind.annotation.PathVariable;

 import org.springframework.web.bind.annotation.RequestMapping;

 import org.springframework.web.bind.annotation.RequestMethod;

 import com.b510.hongten.demo.entity.Demo;

 /**

  * @author Hongten

  * @date Nov 19, 2017

  */

 @Controller

 @RequestMapping("/demo")

 public class DemoController {

     private static final Logger logger = Logger.getLogger(DemoController.class);

     @RequestMapping(value = "/show/{name}", method = RequestMethod.GET)

     public String show(@PathVariable("name") String name, Model model) {

         logger.info("name is " + name);

         Demo demo = new Demo();

         demo.setTitle("Spring MVC Demo");

         demo.setName(name);

         model.addAttribute(demo);

         return "demo/show";

     }

     @RequestMapping(value = "/show", method = RequestMethod.GET)

     public String show(Model model) {

         logger.info("show method...");

         Demo demo = new Demo();

         demo.setTitle("Spring MVC Demo");

         demo.setName("Hongten");

         model.addAttribute("demo", demo);

         return "demo/show";

     }

 }

4. JSP Views

A JSP page(show.jsp) to display the value, and include bootstrap css and js.

 <%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>

 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>

 <!DOCTYPE html>

 <html lang="en">

 <jsp:include page="/WEB-INF/views/common/common-libs.jsp" />

 <head>

 <title>Spring MVC Demo</title>

 </head>

 <nav class="navbar navbar-inverse navbar-fixed-top">

   <div class="container">

     <div class="navbar-header">

         <a class="navbar-brand" href="#">Spring MVC Demo</a>

     </div>

   </div>

 </nav>

 <div class="jumbotron">

   <div class="container">

     <h1>${demo.title}</h1>

     <p>

         <c:if test="${not empty demo.name}">

             Hello <font color='red'>${demo.name}</font>

         </c:if>

         <c:if test="${empty demo.name}">

             Welcome Welcome!

         </c:if>

     </p>

     <p>

     <a class="btn btn-primary btn-lg" href="./demo/show" role="button">Home</a>

     </p>

   </div>

 </div>

 <div class="container">

   <div class="row">

     <div class="col-md-4">

         <h2>Heading</h2>

         <p>Totoro</p>

         <p>

         <a class="btn btn-default" href="./demo/show/Totoro" role="button">View details</a>

         </p>

     </div>

     <div class="col-md-4">

         <h2>Heading</h2>

         <p>Tome James</p>

         <p>

         <a class="btn btn-default" href="./demo/show/Tome James" role="button">View details</a>

         </p>

     </div>

     <div class="col-md-4">

         <h2>Heading</h2>

         <p>John Mohanmode</p>

         <p>

         <a class="btn btn-default" href="./demo/show/John Mohanmode" role="button">View details</a>

         </p>

     </div>

   </div>

   <hr>

   <footer>

     <p>© Hongten 2017</p>

   </footer>

 </div>

 </body>

 </html>

5. Spring XML Configuration

5.1. Enable component scanning, view resolver and resource mapping.

 <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" xmlns:mvc="http://www.springframework.org/schema/mvc"

     xsi:schemaLocation="

         http://www.springframework.org/schema/beans

         http://www.springframework.org/schema/beans/spring-beans-3.2.xsd

         http://www.springframework.org/schema/mvc

         http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd

         http://www.springframework.org/schema/context

         http://www.springframework.org/schema/context/spring-context-3.2.xsd">

     <!-- Enable component scanning -->

     <context:component-scan base-package="com.b510.hongten" />

     <!-- Enable annotation -->

     <mvc:annotation-driven />

     <!-- Enable view resolver -->

     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">

         <property name="prefix">

             <value>/WEB-INF/views/</value>

         </property>

         <property name="suffix">

             <value>.jsp</value>

         </property>

     </bean>

     <!-- Enable resource mapping -->

     <mvc:resources mapping="/resources/**" location="/resources/" />

 </beans>

5.2. Declares a DispatcherServlet in web.xml. If the Spring XML configuration file is NOT specified, Spring will look for the {servlet-name}-servlet.xml.

In this example, Spring will look for the spring-web-servlet.xml file.

 <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

           http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"

     version="3.0">

     <servlet>

         <servlet-name>spring-web</servlet-name>

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

         <load-on-startup>1</load-on-startup>

     </servlet>

     <servlet-mapping>

         <servlet-name>spring-web</servlet-name>

         <url-pattern>/</url-pattern>

     </servlet-mapping>

 </web-app>

6. Build Project

6.1 Build the project in eclipse with maven

Right click project -> Run As -> Maven build...

6.2.Enter 'clean install' to build project.

clean install

6.3.Should see the 'BUILD SUCCESS' result.

7. Run Project on Tomcat Server

7.1.Select Servers tab and right click Tomcat v7.0 and select Add and Remove...

7.2.Add springmvc project to Tomcat.

7.3. Start Tomcat server.

8. Demo

The result like this:

http://localhost:8080/springmvc/

Click 'Home' button to go show page.

9. Source Code Download

The source code download below:

springmvc.zip

Good Luck!

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