Spring Boot Hello World Example

In the section, we will create a Maven project for Hello Word Example. We need the following tools and technologies to develop the same.

Spring Boot 2.2.2.RELEASE
JavaSE 1.8
Maven 3.3.9
STS IDE

Step 1: Open Spring Initializr https://start.spring.io/.

Step 2: Provide the Group name. We have provided com.javatpoint.

Step 3: Provide the Artifact Id. We have provided the spring-boot-hello-world-example.

Step 4: Add the dependency Spring Web.

Step 5: Click on the Generate button. When we click on the Generate button, it wraps all the specifications into a jar file and downloads it to our local system.

Step 6: Extract the RAR file.

Step 7: Import the project folder by using the following steps:

File -> Import -> Existing Maven Project -> Next -> Browse -> Select the Project Folder -> Finish

When the project imports successfully, it shows the following project directory in the Package Explorer section of the IDE.

Step 8: Create a package with the name com.javatpoint.controller inside the folder src/main/java.

Step 9: Create a Controller class with the name HelloWorldController.

Step 10: Create a method named hello() that returns a String.

HelloWorldController.java

package com.javatpoint.controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class HelloWorldController 
{
@RequestMapping("/")
public String hello() 
{
return "Hello javaTpoint";
}
}

Step 11: Run the SpringBootHelloWorldExampleApplication.java file.

SpringBootHelloWorldExampleApplication.java

package com.javatpoint;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringBootHelloWorldExampleApplication
{
public static void main(String[] args) 
{
SpringApplication.run(SpringBootHelloWorldExampleApplication.class, args);
}
}

When the application runs successfully, it shows a massage in the console, as shown in the following figure.