Advantages of using Spring Boot.

To ease the Java-based applications Development, Unit Test and Integration Test Process.

To reduce development, unit Test and integration Test time by providing some defaults.

To increase productivity.

It avoids writing lots of boilerplate code, annotations and XML configuration.

It is very easy to integrate Spring Boot Application with its Spring Ecosystem like Spring JDBC, Spring ORM, Spring Data, Spring Security etc. It follows the "Opinionated Defaults Configuration" approach to reduce developer effort.

It provides Embedded HTTP servers like Tomcat, Jetty etc. to develop and test our web applications very easily.

It provides CLI (Command Line Interface) tool to develop and test Spring Boot(Java or Groovy) Applications from command prompt very easily and quickly.

It provides plugins to develop and test Spring Boot Applications very easily using build Tools like Maven and Gradle.

It provides plugins to work with embedded and in-memory Databases very easily.