Spring Initializr - Bootstrap Your Spring Boot Applications at F1 speed!


Spring Initializr http://start.spring.io/ is great tool to bootstrap your Spring Boot projects.

It allows you to create varied range of Spring Boot based Applications from a very simple UI. Some of the types of applications you can bootstrap are:

  • Web Applications
  • Restful Applications
  • Batch Applications

Spring Boot provides a wide range of starter projects. Spring Initializr suppports all of them and more. Among a varied range of starter projects and options supported are:

  • spring-boot-starter-web-services : For building applications exposing SOAP Web Services
  • spring-boot-starter-web - Build Web applications & RESTful applications
  • spring-boot-starter-test - Write great Unit and Integration Tests
  • spring-boot-starter-jdbc - Traditional JDBC Applications
  • spring-boot-starter-hateoas - Make your services more RESTful by adding HATEOAS features
  • spring-boot-starter-security - Authentication and Authorization using Spring Security
  • spring-boot-starter-data-jpa - Spring Data JPA with Hibernate
  • spring-boot-starter-cache - Enabling Spring Framework’s caching support
  • spring-boot-starter-data-rest - Expose Simple REST Services using Spring Data REST

In this guide, lets consider creating a simple web application with Spring Initializr.

10 Step Reference Courses

Bootstrapping a Web application with Spring Initializr

Creating a Web application with Spring Initializr is very simple.

Image

As shown in the image above, following steps have to be done

  • Launch Spring Initializr http://start.spring.io/ and choose the following
    • Choose com.in28minutes.springboot as Group
    • Choose student-services as Artifact
    • Choose following dependencies
      • Web
  • Click Generate Project button at the bottom of the page.
  • Import the project into Eclipse.

Structure of the project created

Screenshot shows the project structure of the imported maven project.

Image

  • StudentServicesApplication.java - Spring Boot Launcher. Initializes Spring Boot Auto Configuration and Spring Application Context.
  • application.properties - Application Configuration file.
  • StudentServicesApplicationTests.java - Simple launcher for use in unit tests.
  • pom.xml - Included dependencies for Spring Boot Starter Web. Uses Spring Boot Starter Parent as parent pom.

Complete Code Generated

Lets look at each of the file that is generated

/pom.xml

Three important things that are configured in pom.xml.

<?xml version="1.0" encoding="UTF-8"?>
<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>com.in28minutes.springboot</groupId>
	<artifactId>student-services-initializr</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>student-services</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.4.4.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-actuator</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>


</project>

/src/main/java/com/in28minutes/springboot/StudentServicesApplication.java

package com.in28minutes.springboot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class StudentServicesApplication {

	public static void main(String[] args) {
		SpringApplication.run(StudentServicesApplication.class, args);
	}
}

/src/main/resources/application.properties


/src/test/java/com/in28minutes/springboot/StudentServicesApplicationTests.java

package com.in28minutes.springboot;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
public class StudentServicesApplicationTests {

	@Test
	public void contextLoads() {
	}

}

Running the application

Following log is generate when you run StudentServicesApplication.java as a Java Application.


  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.4.4.RELEASE)

2017-01-28 17:37:28.970  INFO 4311 --- [  restartedMain] c.i.s.StudentServicesApplication         : Starting StudentServicesApplication on Rangas-MacBook-Pro.local with PID 4311 (/in28Minutes/Workspaces/SpringBootTutorialWebsite2017Jan/creating-web-project/target/classes started by rangaraokaranam in /in28Minutes/Workspaces/SpringBootTutorialWebsite2017Jan/creating-web-project)
2017-01-28 17:37:28.978  INFO 4311 --- [  restartedMain] c.i.s.StudentServicesApplication         : No active profile set, falling back to default profiles: default
2017-01-28 17:37:29.179  INFO 4311 --- [  restartedMain] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot[email protected]3c9199ed: startup date [Sat Jan 28 17:37:29 IST 2017]; root of context hierarchy
2017-01-28 17:37:30.970  INFO 4311 --- [  restartedMain] o.s.core.annotation.AnnotationUtils      : Failed to introspect annotations on [class org.springframework.boot.actuate.autoconfigure.EndpointWebMvcHypermediaManagementContextConfiguration]: java.lang.ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxy
2017-01-28 17:37:30.972  INFO 4311 --- [  restartedMain] o.s.core.annotation.AnnotationUtils      : Failed to introspect annotations on [class org.springframework.boot.actuate.autoconfigure.EndpointWebMvcHypermediaManagementContextConfiguration]: java.lang.ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxy
2017-01-28 17:37:33.167  INFO 4311 --- [  restartedMain] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2017-01-28 17:37:33.224  INFO 4311 --- [  restartedMain] o.apache.catalina.core.StandardService   : Starting service Tomcat
2017-01-28 17:37:33.226  INFO 4311 --- [  restartedMain] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.11
2017-01-28 17:37:33.437  INFO 4311 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2017-01-28 17:37:33.438  INFO 4311 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 4296 ms
2017-01-28 17:37:33.905  INFO 4311 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: 'dispatcherServlet' to [/]
2017-01-28 17:37:33.911  INFO 4311 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'metricsFilter' to: [/*]
2017-01-28 17:37:33.912  INFO 4311 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
2017-01-28 17:37:33.912  INFO 4311 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2017-01-28 17:37:33.912  INFO 4311 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2017-01-28 17:37:33.912  INFO 4311 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
2017-01-28 17:37:33.913  INFO 4311 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'webRequestLoggingFilter' to: [/*]
2017-01-28 17:37:33.913  INFO 4311 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'applicationContextIdFilter' to: [/*]
2017-01-28 17:37:34.546  INFO 4311 --- [  restartedMain] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot[email protected]3c9199ed: startup date [Sat Jan 28 17:37:29 IST 2017]; root of context hierarchy
2017-01-28 17:37:34.653  INFO 4311 --- [  restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2017-01-28 17:37:34.654  INFO 4311 --- [  restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2017-01-28 17:37:34.717  INFO 4311 --- [  restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-01-28 17:37:34.717  INFO 4311 --- [  restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-01-28 17:37:34.785  INFO 4311 --- [  restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-01-28 17:37:35.364  INFO 4311 --- [  restartedMain] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/dump || /dump.json],methods=[GET],produces=[application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
2017-01-28 17:37:35.366  INFO 4311 --- [  restartedMain] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/metrics/{name:.*}],methods=[GET],produces=[application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.MetricsMvcEndpoint.value(java.lang.String)
2017-01-28 17:37:35.367  INFO 4311 --- [  restartedMain] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/metrics || /metrics.json],methods=[GET],produces=[application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
2017-01-28 17:37:35.369  INFO 4311 --- [  restartedMain] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/trace || /trace.json],methods=[GET],produces=[application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
2017-01-28 17:37:35.370  INFO 4311 --- [  restartedMain] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/configprops || /configprops.json],methods=[GET],produces=[application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
2017-01-28 17:37:35.371  INFO 4311 --- [  restartedMain] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/info || /info.json],methods=[GET],produces=[application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
2017-01-28 17:37:35.373  INFO 4311 --- [  restartedMain] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/autoconfig || /autoconfig.json],methods=[GET],produces=[application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
2017-01-28 17:37:35.375  INFO 4311 --- [  restartedMain] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/heapdump || /heapdump.json],methods=[GET],produces=[application/octet-stream]}" onto public void org.springframework.boot.actuate.endpoint.mvc.HeapdumpMvcEndpoint.invoke(boolean,javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) throws java.io.IOException,javax.servlet.ServletException
2017-01-28 17:37:35.378  INFO 4311 --- [  restartedMain] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/beans || /beans.json],methods=[GET],produces=[application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
2017-01-28 17:37:35.384  INFO 4311 --- [  restartedMain] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/env/{name:.*}],methods=[GET],produces=[application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EnvironmentMvcEndpoint.value(java.lang.String)
2017-01-28 17:37:35.384  INFO 4311 --- [  restartedMain] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/env || /env.json],methods=[GET],produces=[application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
2017-01-28 17:37:35.385  INFO 4311 --- [  restartedMain] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/health || /health.json],produces=[application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.HealthMvcEndpoint.invoke(java.security.Principal)
2017-01-28 17:37:35.387  INFO 4311 --- [  restartedMain] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/mappings || /mappings.json],methods=[GET],produces=[application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
2017-01-28 17:37:35.653  INFO 4311 --- [  restartedMain] o.s.b.d.a.OptionalLiveReloadServer       : LiveReload server is running on port 35729
2017-01-28 17:37:35.832  INFO 4311 --- [  restartedMain] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
2017-01-28 17:37:35.850  INFO 4311 --- [  restartedMain] o.s.c.support.DefaultLifecycleProcessor  : Starting beans in phase 0
2017-01-28 17:37:36.111  INFO 4311 --- [  restartedMain] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2017-01-28 17:37:36.119  INFO 4311 --- [  restartedMain] c.i.s.StudentServicesApplication         : Started StudentServicesApplication in 8.193 seconds (JVM running for 10.023)

Congratulations! You are reading an article from a series of 50+ articles on Spring, Spring Boot , Hibernate, Full Stack, Cloud and Microservices. We also have 20+ projects on our Github repository. For the complete series of 50+ articles and code examples, click here.

Join 300,000 Learners!

Learn Spring Boot in 10 Steps - FREE Course

Next Steps

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image

All Files

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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>com.in28minutes.springboot</groupId>
	<artifactId>student-services</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>student-services</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.4.4.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-actuator</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>


</project>

src/main/java/com/in28minutes/springboot/StudentServicesApplication.java

package com.in28minutes.springboot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class StudentServicesApplication {

	public static void main(String[] args) {
		SpringApplication.run(StudentServicesApplication.class, args);
	}
}

src/main/resources/application.properties


src/test/java/com/in28minutes/springboot/StudentServicesApplicationTests.java

package com.in28minutes.springboot;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
public class StudentServicesApplicationTests {

	@Test
	public void contextLoads() {
	}

}

Related Posts

Spring Boot Tutorials for Beginners

At in28Minutes, we are creating a number of tutorials with videos, articles & courses on Spring Boot for Beginners and Experienced Developers. This resources will help you learn and gain expertise at Spring Boot.

Spring and Spring Boot Video Tutorials for Beginners

At in28Minutes, we are creating a number of tutorials with videos, articles & courses on Spring Boot for Beginners and Experienced Developers. Here's a list of video tutorials and courses for you

What is an In Memory Database?

In this article, we understand what the term "In-Memory Database" actually means. We see what scenarios they can be used, and why they are important.

What is an Embedded Server?

In this article, we focus in exploring what an embedded server is, and how they help make application deployment simpler.

Java Tools and Frameworks - Introduction To Maven

In this article, we experience a brief introduction to Maven, and will see how it helps in managing your project dependencies.

Five Tools To Learn as a Java Developer

In this article, we introduce you to five great tools that we recommend every Java Developer to learn.

Five Languages To Learn as a Java Programmer

As a programmer, you want to explore new things. Learning a new language gives you a different perspective when solving problems. What are the 5 languages that a Java developer should explore?

Five Great Frameworks To Try for Java Programmers

As a programmer you want to explore new languages and frameworks. What would be the best frameworks to explore in 2019 for Java Programmers?

Unit Testing Best Practices - with Java and Junit Examples

Unit Testing is often underrated. As far as I am concerned, having good unit tests seperates good projects from bad. In this article, let's look at unit testing best practices in depth. We use examples from Java and JUnit to illustrate the concepts. However, the best practices are applicable irrespective of the programming language used.

Programming Basics - Unit Testing - What Is Mocking?

Mocking is an important concept that is made use of, when writing unit tests. In this article, we explore what mocking is all about, and explore some of the popular Java mocking frameworks in use.