Spring Boot Backend

Spring Boot Backend

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1. Backend Development Basics

You’ll learn the basics of backend development, including how the HTTP protocol works and the differences between HTTP and HTTPS. You’ll also study HTTP status codes and data formats like JSON and XML for transferring information between client and server.

Introduction to Backend

Data formats: JSON and XML

2. Spring Boot Basics

In this section, we will dive into the essential concepts of backend development using Spring. We will cover various topics, including an introduction to Spring, the principles of Inversion of Control (IoC) and Dependency Injection (DI), the structure of a Spring Boot project, Spring MVC, three-tier architecture, and task management. Each chapter will build upon the previous one to provide a comprehensive understanding of backend development in a Spring environment.

Introduction to Spring

Project structure

Three-Level Architecture

3. RESTful API

This section covers the fundamentals and practical implementation of RESTful APIs, starting with the theoretical understanding of REST and its core principles. It also includes building your own API, working with DTOs, handling exceptions, integrating Swagger for documentation, and testing the API.

Basic Principles of REST

Writing Your Own REST API

Working with DTO

Exception Handling

Testing RESTful API

4. Working with Databases

This section covers the basics of working with relational databases, including connection setup, migrations, and interaction with Object-Relational Mappers (ORM) using JPA and Hibernate. It discusses how to integrate databases with Spring Boot applications and explores key aspects of transaction management to ensure data integrity. The goal of this section is to enhance your database skills and promote their effective use in application development.

Introduction to Relational Databases

Connecting a MySQL Database

Database Migrations

Working with ORM: JPA and Hibernate

Add the Database to Our Application

5. Testing Backend Applications

This section focuses on testing backend applications and covers essential topics such as the fundamentals of testing, unit testing using JUnit, and integration testing. It also explores the use of mock objects with the Mockito library to create effective and isolated tests. This section will help developers understand the importance of testing and learn how to utilize tools to enhance the quality and reliability of their applications.

Fundamentals of Testing Backend Applications

Modular Testing With JUnit

Challenge: Unit Testing

Course Content

Spring Boot Backend

Spring Boot Backend

1. Backend Development Basics

Introduction to Backend How HTTP Works HTTP/HTTPS Status Code Data formats: JSON and XML

2. Spring Boot Basics

Introduction to Spring Project structure Spring MVC IoC and DI Three-Level Architecture Spring Task

3. RESTful API

What is REST?Basic Principles of REST Writing Your Own REST API Working with DTO Exception Handling Swagger Testing RESTful API

4. Working with Databases

Introduction to Relational Databases Connecting a MySQL Database Database Migrations Working with ORM: JPA and Hibernate Add the Database to Our Application Transactions

5. Testing Backend Applications

Fundamentals of Testing Backend Applications Modular Testing With JUnit Mockito Challenge: Unit Testing Course Summary

Writing Your Own REST API

Well, let’s move on to the most exciting part and write our own REST API. I recommend coding along as you watch the video for a better understanding.

Let’s create a simple RESTful API for a bookstore using Spring Boot. We will include all the necessary components: models, repositories, services, controllers. The API will support creating, reading, updating, and deleting books.

Short Clip From the Video

In our REST API, we defined the model we’ll be working with (Book model), which includes the following fields:

Main


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public class Book {
    private String id;
    private String name;
    private String author;
    private String price;
}

We also implemented endpoints for our application, which we will test in the following chapters.

Examples of the endpoints:

GET /books — retrieves all books (findAllBooks() method);
POST /books — creates a new book (createBook() method);
PUT /books/{id} — updates a book with the specified ID (updateBook() method);
DELETE /books/{id} — deletes a book with the specified ID (deleteBook() method).

Lombok Dependency

If you want to learn more about Lombok, you can read about it here. Also, here’s a link to the dependency.

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Section 3. Chapter 3

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