SpringBootApp

Spring Boot Demo Application

What is SrpingBoot

SpringBoot is an extention of spring framework which is open source java based framework and used for creating faster and easier microservices for integrating with multiple systems/REST APIs. Easy to create Stand alone and production grade applications using SpringBoot. Provides broad infrastructure support for creating micro and enterprise level applications for deveopers. Developed by Pivotal

Features

1. No XML configuration required
2. Code Generation not neccesary
3. In build Tomcat, Jetty or Under Tow web application server
4. Supported build tools are Maven and Gradle.
5. Spring application configuration is Automated.
6. Provide Monitoring, health checks etc.

Prerequisites

1. JDK 1.8 or higher versions
2. Maven latest version
3. Gradle latest version and setup environment variables a. Check installation using commandline: gradle -version
4. Download spring boot CLI and setup environment variables a.Check installation using commandline: spring --version

How to Create a DEMO Application

1. Use Spring Initializer to create a Spring Boot Application using start.spring.io
2. Follow as per the below image and select neccessary attributes and click on generate to create a Spring boot application.
3. Unzip the JAR/WAR file, observe Demo java class, POM and Gradle files which automatically generated as per the Spring boot Web application. Upload it into IDE.
4. Once uploaded do the following changes, a. Create a Rest Endpoint as (/demo) in the Spring Application adding @ResrController annotation on top of the Demo Java class. b. Write hello() method by passing name as argument and add @RequestParam annotation pass default value if not provided. c. Use @GetMapping(value="/demo") on top of hello() method.

Deployment

To deploy this project run create build file using mavne and gradle commands using commandline

Create a build file using maven command

  mvn clean install

  gradle clean build

Deploy this project JAR file which can observe in target folder as demo-0.0.1-SNAPSHOT.jar using below command

  java -jar demo-0.0.1-SNAPSHOT.jar

Observe console which shows application running with Tomcat server on default port number 8080 and hit browser using http://localhost:8080/demo which returns default response as "Hello Sudharshan! from Spring boot aplication"

To change response with different value pass Request Parameter in url like ?name="value"