Java Spring Boot (Part 1)

Spring based Java Applications that you can "just run".

Spring Framework logo by Pivotal Software is licensed under Apache License 2.0

Spring Tool Suite

Spring Tool Suite is an Integrated Development Environment based on Eclipse.

Maven

Maven is a build and dependency management tool for Java.

The pom.xml file is used to maintain a list of modules that the Spring application depends on.

Module jar files are downloaded from a managed repository.

Creating a REST project using Spring Boot

Open Spring Tool Suite
Create new Spring Starter Project
Add Book class
Add BooksRestController
Run as Spring Boot App
Test using Browser

Create new Spring Starter Project

Enter the project name and package details

The REST API project depends on "Spring Web"

Add a new class

Add class "Book"

Book.java

Add class "BooksRestController"

Annotations

The @RestController annotation is used to mark the BooksRestController class as a Spring Framework RestController.

Add @RestController annotation to BooksRestController class
Use CTRL+Space to import org.springframework.web.bind.annotation.RestController

Add "books" ArrayList to the BooksRestController

Books REST Controller

The @GetMapping annotation is used to mark the book and books methods as HTTP Get method handlers.

The completed BooksRestController code is shown below.

BooksRestController.java

Run as Spring Boot App

http://localhost:8080/books

http://localhost:8080/books/1788395549

http://localhost:8080/books/1234567890

React client

Static files can be added to the /src/main/resources/static folder of the Spring Boot project.

The static files can be image files, html files and javascript files.

The static files can be a React app that calls the REST API exposed by the (same) Spring Boot project.

Static files

App.js

index.html

Running the React/Spring Boot app