Spring Boot:

A Java web application framework

See http://pconrad-webapps.github.io/topics/spring_boot/

Some core concepts to learn

Spring Repositories https://docs.spring.io/spring-data/data-commons/docs/1.6.1.RELEASE/reference/html/repositories.html
Spring Sessions https://docs.spring.io/spring-session/docs/2.1.6.BUILD-SNAPSHOT/reference/html5/
Spring OAuth2 Client https://spring.io/guides/tutorials/spring-boot-oauth2/

Tutorial Collections

Mkyong’s Tutorial Collection: https://www.mkyong.com/tutorials/spring-boot-tutorials/

Some very basic examples

The code you get if you use Spring Boot Initializr and take all of the defaults
- https://github.com/pconrad/spring-boot-initialzr-vanilla
A very simple, minimal, SpringBoot webapp
- https://github.com/pconrad/spring-boot-minimal-webapp
A only slightly more complex SpringBoot webapp
- https://github.com/pconrad-webapps/spring-boot-thymeleaf-bootstrap-from-cdn
- This just shows how to incoporate Thymeleaf templating, and loading the CSS and JS for Bootstrap from a CDN
Adding OAuth
- https://github.com/pconrad-webapps/spring-boot-thymeleaf-bootstrap-oauth
- This adds OAuth to the one above.

Related topics:

Spring Boot: —A Java web application framework
Spring Boot: Actuator—Checking the endpoint mappings, health or other info about your Spring Boot app
Spring Boot: Application Properties—Defining the application.properties
Spring Boot: ControllerAdvice—A place to factor out common ExceptionHandler, ModelAttribute and InitBinder code across multiple controllers
Spring Boot: CSV—Downloading and Uploading CSV files with Spring Boot
Spring Boot: Database Migrations—When you need to make a change to your database schema for an app in progress
Spring Boot: Heroku—Tips for running with Spring Boot applications on Heroku
Spring Boot: Logging—How to write information to the log in Spring Boot
Spring Boot: OAuth—How to implement OAuth for authentication in Spring Boot
Spring Boot: POST and CSRF—If you get 403 forbidden messages when using POST
Spring Boot: Postgres—Using Spring Boot with Postgres
Spring Boot: RestTemplate—When you need to access other APIs from the backend of your Spring Boot Application
Spring Boot: Secrets—Ways of keepings database credentials and OAuth client secrets out of Github
Spring Boot: Security—Authentication, Authorization and other Security issues
Spring Boot: Sessions—How to make the stateless HTTP protocol stateful
Spring Boot: SQL—Working with SQL and Databases in Spring Boot
Spring Boot: VS Code—Suggested VS Code extensions for working with Spring Boot