How to Create a Web App with Spring Boot Using Spring CLI and Maven

Jul 12, 2024

Introduction

In this tutorial, we will walk through the process of creating a simple web application using Spring Boot, Spring CLI, and Maven. Spring Boot makes it easy to create stand-alone, production-grade Spring-based Applications with minimal setup.

Prerequisites

Before we begin, make sure you have the following installed:

Java Development Kit (JDK) 8 or higher
Spring CLI
Maven

Step 1: Install Spring CLI

If you haven’t already installed Spring CLI, follow these steps:

# Install SDKMAN (if you haven't already)curl -s "https://get.sdkman.io" | bash
source "$HOME/.sdkman/bin/sdkman-init.sh"

# Install Spring CLI
sdk install springboot

Step 2: Create a New Spring Boot Project

Open a terminal and run the following command to create a new Spring Boot project with Maven as the build tool and include the web dependency:

spring init --dependencies=web,devtools --build=maven mywebappcd mywebapp

Step 3: Modify `DemoApplication.java`

Open DemoApplication.java (located in src/main/java/com/example/mywebapp) and add a REST controller with a hello endpoint:

javaCopy codepackage com.example.mywebapp;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
public class DemoApplication {

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

    @RestController
    class HelloWorldController {

        @GetMapping("/hello")
        public String hello() {
            return "Hello, World!";
        }
    }
}

Step 4: Run Your Application

Use Maven to run your Spring Boot application:

./mvnw spring-boot:run

Step 5: Verify Your Application

Open a web browser and navigate to http://localhost:8080/hello. You should see the message “Hello, World!” displayed.

Conclusion

Congratulations! You have successfully created a simple web application using Spring Boot, Spring CLI, and Maven. You can now extend this application by adding more controllers, services, and integrating with databases or other services as needed.

Additional Resources

This structured blog post will guide your readers through the process of creating their first Spring Boot web application using Spring CLI with Maven. Feel free to adjust the content based on your specific audience or additional details you’d like to include!

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