This chapter has given you a quick overview of what Spring Boot has to offer. In this chapter, we have learned how Spring Boot simplified Spring application development. Spring Boot made this magic possible by using its key components such as Spring Boot auto-configuration, Starters, Spring Boot CLI, and Spring Boot Actuator. You can take advantage of Spring Boot Starter dependencies and auto-configuration; you can do rapid development of the Spring application by just focusing only on the application logic, rather than configurations and build dependencies, libraries, and version management. Meanwhile, auto-configuration frees you from boilerplate configuration.

We have also created a very simple Hello World REST application by using the web-based Spring Initializr and Spring Tool Suite IDE, and we have run this application, where we used the embedded Tomcat container.

In Chapter 2, Customizing Auto-Configuration in Spring Boot Application, we'll dive deeper into Spring Boot auto-configuration and its customization in the Spring Boot application.