Spring Boot- Lets Get start

Spring Boot: In this article, we will talk about how a person will start working using spring boot. Most of the people don’t know what is spring boot( Check here )

Let start with very basic ,

Setting up the development environment

Spring boot can be used by any IDE but the recommended IDE for Spring boot is STS ( Spring Tool Suite ) Which is basically a customized Eclipse IDE have different inbuild plugin for Spring boot support.

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Prerequisites:

• If you want to work on Spring boot , you should be familiar with Spring framework.
• You should know the Java programming language.
• You should have a hands on experience on Spring Annotations.

Resources to learn Spring boot

To learn Spring boot there are so many different sites , But I always recommend you to Always first read the Official Documentation of Spring boot.

Moreover you can always explore different sites and you tube lectures for spring and spring boot.

You can also refer udemy course , Some recommended courses are as below.

https://www.udemy.com/spring-boot-essentials/

https://www.udemy.com/spring-boot-tutorial-for-beginners/

There are some free course were also you can explore.

https://www.udemy.com/spring-boot-getting-started/

You can also use some sites to learn spring boot

• www.programinjava.com
• http://www.baeldung.com/
• http://www.springboottutorial.com/

Now lets create our first spring boot project

In this exercise

• what we will do is to create one simple spring boot application where
  • We will show you how to create spring boot project.
  • How to run spring project as java application which will run embedded tomcat.
  • We will Show you the console of the topic to show once tomcat runs successfully.

Creating Project In STS IDE:

1. We first create first spring boot project as below in eclipse

Figure1: Creating New Project

2. Now we will set the project name as below

Figure2: Setting the project name

3. After this you will be able to see the project as below

Now when we see the Code of the Generated File it will looks like below

package com.example.demo;

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

@SpringBootApplication
public class FirstSpringBootProjectApplication {

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

@SpringBootApplication : This is one of the most important Annotation Which enable Spring boot application, It is the combination of below important annotations

@SpringBootApplication = @ComponentScan + @EnableAutoConfiguration

Running the Application

To Run the Application we just need to Run above class as Run as Java Application

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.0.2.RELEASE)

2018-05-24 23:44:17.383  INFO 11652 --- [           main] c.e.d.FirstSpringBootProjectApplication  : Starting FirstSpringBootProjectApplication on LAPTOP-OTUSTG0M with PID 11652 (C:\learnspringboot_workspace\FirstSpringBootProject\target\classes started by Noeik in C:\learnspringboot_workspace\FirstSpringBootProject)
2018-05-24 23:44:17.389  INFO 11652 --- [           main] c.e.d.FirstSpringBootProjectApplication  : No active profile set, falling back to default profiles: default
2018-05-24 23:44:17.435  INFO 11652 --- [           main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@a263c2: startup date [Thu May 24 23:44:17 IST 2018]; root of context hierarchy
2018-05-24 23:44:17.966  INFO 11652 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
2018-05-24 23:44:17.980  INFO 11652 --- [           main] c.e.d.FirstSpringBootProjectApplication  : Started FirstSpringBootProjectApplication in 0.928 seconds (JVM running for 1.566)
2018-05-24 23:44:17.983  INFO 11652 --- [       Thread-2] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@a263c2: startup date [Thu May 24 23:44:17 IST 2018]; root of context hierarchy

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