spring boot + Spring MVC + Maven + JSP example

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Spring boot jsp example

Directory Structure

pom.xml file

Modify auto created POM file. We need to add parent in pom to make it a spring boot application. After that add spring-boot-starter-web dependency and java version. 

<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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
 
  <groupId>codesjava</groupId>
  <artifactId>SpringBoot02</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>
 
  <name>SpringBoot02</name>
  <url>http://maven.apache.org</url>
 
  <properties>
    <java.version>1.8</java.version>  
  </properties>
 
  <parent>  
    <groupId>org.springframework.boot</groupId>  
    <artifactId>spring-boot-starter-parent</artifactId>  
    <version>1.4.2.RELEASE</version>  
 </parent>  
 
  <dependencies>
       <!-- This is a web application -->
	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-web</artifactId>
	</dependency>
 
	<!-- Tomcat embedded container-->
	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-tomcat</artifactId>
		<scope>provided</scope>
	</dependency>
 
	<!-- JSTL for JSP -->
	<dependency>
		<groupId>javax.servlet</groupId>
		<artifactId>jstl</artifactId>
	</dependency>
 
	<!-- Need this to compile JSP -->
	<dependency>
		<groupId>org.apache.tomcat.embed</groupId>
		<artifactId>tomcat-embed-jasper</artifactId>
		<scope>provided</scope>
	</dependency>
 
	<!-- Need this to compile JSP -->
	<dependency>
		<groupId>org.eclipse.jdt.core.compiler</groupId>
		<artifactId>ecj</artifactId>
		<version>4.6.1</version>
		<scope>provided</scope>
	</dependency>
 
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
 
  <build>
		<plugins>
			<!-- Package as an executable jar or war -->
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
</project>

Now, right click on project -> click on Maven -> click on update project -> Popup window will open -> click Ok to update the project.
It is a initializer class which runs a SpringApplication.
App.java

package com.w3schools;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.support.SpringBootServletInitializer;
 
@SpringBootApplication  
public class App extends SpringBootServletInitializer {
	@Override
	protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
		return application.sources(App.class);
	}
    public static void main( String[] args ) {
    	SpringApplication.run(App.class, args);  
    }
}

HelloWorldController.java

package com.w3schools;
 
import java.util.Map;
 
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
 
@Controller
public class HelloWorldController {
	private String message = "Hello World";
 
	@RequestMapping("/")
	public String welcome(Map&lt;String, Object&gt; model) {
		model.put("message", this.message);
		return "helloWorld";
	}
}

helloWorld.jsp

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
	<h2>Spring Boot JSP Hello World Example</h2>
	<h2>Message: ${message}</h2>
</body>
</html>

application.properties

spring.mvc.view.prefix: /WEB-INF/views/
spring.mvc.view.suffix: .jsp

Hit http://localhost:8080/ in the browser, following output will come.
Spring security