Running a Spring Boot application

The fabulous https://start.spring.io website created a tiny class, LearningSpringBootApplication, as shown here:

    package com.greglturnquist.learningspringboot; 
 
    import org.springframework.boot.SpringApplication; 
    import 
     org.springframework.boot.autoconfigure.SpringBootApplication; 
 
    @SpringBootApplication 
    public class LearningSpringBootApplication { 
 
      public static void main(String[] args) { 
        SpringApplication.run( 
          LearningSpringBootApplication.class, args); 
      } 
    } 

This preceding tiny class is actually a fully operational web application!

• The @SpringBootApplication annotation tells Spring Boot, when launched, to scan recursively for Spring components inside this package and register them. It also tells Spring Boot to enable autoconfiguration, a process where beans are automatically created based on classpath settings, property settings, and other factors. We'll see more of this throughout the...