Spring Boot Tutorial 2025: Learn Modern Java Development

As web applications become more complex and enterprise-grade, developers need a framework that is powerful, fast, and simple. That’s exactly where Spring Boot excels. In this Spring Boot Tutorial, you’ll learn how to build modern backend applications using Java—with minimal configuration and maximum productivity.

If you’re wondering what is Spring Boot, this guide explains the concept and shows you how to build your first REST API step by step. Whether you're a Java newbie or aiming to modernize legacy systems, this tutorial from Tpoint Tech is designed for 2025 and beyond.

What is Spring Boot?

Spring Boot is an open-source framework built on top of the Spring Framework. It simplifies the process of developing stand-alone, production-ready Spring applications by reducing boilerplate code and eliminating the need for XML configuration.

Key Features:

• Auto Configuration: Automatically configures Spring beans based on the classpath.

• Embedded Servers: Includes embedded Tomcat, Jetty, or Undertow—no need to deploy WAR files.

• Starter Dependencies: Bundled modules to help you start coding fast.

• Actuator: Production-ready monitoring tools built-in.

• Minimal Setup: Get a working application running with just a few lines of code.

If you're still asking what is Spring Boot, think of it as the fast track to building modern backend applications with Java.

Getting Started with Spring Boot

Let’s walk through the practical part of this Spring Boot Tutorial by building a simple backend application using Spring Boot, Spring Web, JPA, and H2 Database.

Step 1: Generate a Spring Boot Project

Visit https://start.spring.io and fill in the following:

• Project: Maven

• Language: Java

• Spring Boot Version: 3.2.x (latest)

• Dependencies:

  • Spring Web

  • Spring Data JPA

  • H2 Database

  • Spring Boot DevTools

Click Generate, then unzip and open the project in your IDE (like IntelliJ, Eclipse, or VS Code).

Step 2: Run the Application

In your terminal or IDE, run the following:

./mvnw spring-boot:run

Spring Boot automatically starts an embedded server (Tomcat) and deploys your application on http://localhost:8080.

Create Your First REST API

Let’s create a basic “Hello World” API.

package com.tpointtech.demo.controller;

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

@RestController
public class HelloController {

    @GetMapping("/hello")
    public String sayHello() {
        return "Welcome to the Spring Boot Tutorial by Tpoint Tech!";
    }
}

Now open your browser and visit:
http://localhost:8080/hello

Output: Welcome to the Spring Boot Tutorial by Tpoint Tech!

Build a CRUD API Using JPA + H2

Let’s expand this Spring Boot project with basic CRUD operations.

Step 3: Create a Model Class

package com.tpointtech.demo.model;

import jakarta.persistence.*;

@Entity
public class Product {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    private double price;

    // Getters and Setters
}

Step 4: Create Repository

package com.tpointtech.demo.repository;

import com.tpointtech.demo.model.Product;
import org.springframework.data.jpa.repository.JpaRepository;

public interface ProductRepository extends JpaRepository<Product, Long> {}

Step 5: Create a REST Controller

package com.tpointtech.demo.controller;

import com.tpointtech.demo.model.Product;
import com.tpointtech.demo.repository.ProductRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("/products")
public class ProductController {

    @Autowired
    private ProductRepository repository;

    @GetMapping
    public List<Product> getAll() {
        return repository.findAll();
    }

    @PostMapping
    public Product create(@RequestBody Product product) {
        return repository.save(product);
    }

    @DeleteMapping("/{id}")
    public void delete(@PathVariable Long id) {
        repository.deleteById(id);
    }
}

Now your Spring Boot app supports basic CRUD operations. You can test it using Postman or curl.

Access the H2 Console

To access the in-memory database, enable the H2 console in application.properties:

spring.h2.console.enabled=true
spring.datasource.url=jdbc:h2:mem:testdb

Visit http://localhost:8080/h2-console and use the above JDBC URL to connect.

Optional: Add Swagger for API Docs

To add Swagger UI (OpenAPI):

Add to pom.xml:

<dependency>
  <groupId>org.springdoc</groupId>
  <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
  <version>2.1.0</version>
</dependency>

Now open http://localhost:8080/swagger-ui.html to see your documented API.

Why Use Spring Boot in 2025?

If you’re still asking what is Spring Boot, here’s why it’s essential in modern Java development:

• Ideal for cloud-native applications

• Perfect for microservices architecture

• Built-in support for security, messaging, and databases

• Backed by a huge community and enterprise adoption

• Saves development time with smart defaults and auto configuration

Final Thoughts from Tpoint Tech

This Spring Boot Tutorial helped you:

Understand what is Spring Boot
Set up a working Java backend in minutes
Create REST APIs and CRUD operations
Access H2 console and add API docs

Spring Boot is the future of Java backend development, especially in 2025 and beyond. It's fast, scalable, and simplifies enterprise-level complexity into clean, manageable code.

Keep Learning with Tpoint Tech

Want to build advanced apps using Spring Boot with MySQL, JWT, or Docker?

Explore:

• Microservices with Spring Cloud

• Spring Boot Security and OAuth2

• Full-stack Spring Boot + React projects

Visit Tpoint Tech — your guide to mastering modern Java development.