Spring Boot Hello Application Example

In this post we will learn how to create spring boot application/project . Now we are going to create our first spring boot application example.  Follow below steps

Step 1.  Firstly we will create java spring boot project using  https://start.spring.io/ website . For create new spring boot project click on Here . I am select maven project with java and spring boot2.1.3 . After that  Fill  Group  , Artifact details and click generate project .

 

Step 2:  After Click Generate project button it will download java spring boot  project for you. Now you extract this zip and import in eclipse . After import java spring boot project in eclipse , application structure such as.

HelloWorldApplication.java

package com.jp.helloWorld;

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

@SpringBootApplication
public class HelloWorldApplication {

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

}

 

Now we will create one rest controller which consume request and produce response for us.

HelloController.java

package com.jp.helloWorld.controller;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

	
	@GetMapping("/app")
	public String getApplicationName(){
		return "Application api call succsfully";
	   }
	}

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>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.3.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.jp</groupId>
	<artifactId>helloWorld</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>helloWorld</name>
	<description>Demo project for Spring Boot</description>

	<properties>
		<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>

 

Now run application by run HelloWorldApplication.java as java project and open url in your browser or any rest client http://localhost:8080/app , you will got response of your api as.

You can download this project from here  SpringBootHelloAPplication