How set up Spring Boot to run HTTPS / HTTP ports

The currently accepted answer works perfectly but needs some adaption if you want it to work with Spring Boot 2.0.0 and onwards:

@Component
public class HttpServer {
  @Bean
  public ServletWebServerFactory servletContainer(@Value("${server.http.port}") int httpPort) {
      Connector connector = new Connector(TomcatServletWebServerFactory.DEFAULT_PROTOCOL);
      connector.setPort(httpPort);

      TomcatServletWebServerFactory tomcat = new TomcatServletWebServerFactory();
      tomcat.addAdditionalTomcatConnectors(connector);
      return tomcat;
  }
}

---

or the Kotlin version:

@Component
class HttpServer {
  @Bean
  fun servletContainer(@Value("\${server.http.port}") httpPort: Int): ServletWebServerFactory {
    val connector = Connector(TomcatServletWebServerFactory.DEFAULT_PROTOCOL)
    connector.setPort(httpPort)

    val tomcat = TomcatServletWebServerFactory()
    tomcat.addAdditionalTomcatConnectors(connector)
    return tomcat
  }
}

Spring Boot configuration using properties, allows configuring only one connector. What you need is multiple connectors and for this, you have to write a Configuration class. Follow instructions in

https://docs.spring.io/spring-boot/docs/1.2.3.RELEASE/reference/html/howto-embedded-servlet-containers.html

You can find a working example of configuring HTTPS through properties and then HTTP though EmbeddedServletContainerCustomizer below

http://izeye.blogspot.com/2015/01/configure-http-and-https-in-spring-boot.html?showComment=1461632100718#c4988529876932015554

server:
  port: 8080
  ssl:
    enabled: true
    keyStoreType: PKCS12
    key-store: /path/to/keystore.p12
    key-store-password: password
  http:
    port: 8079

---

@Configuration
public class TomcatConfig {

@Value("${server.http.port}")
private int httpPort;

@Bean
public EmbeddedServletContainerCustomizer containerCustomizer() {
    return new EmbeddedServletContainerCustomizer() {
        @Override
        public void customize(ConfigurableEmbeddedServletContainer container) {
            if (container instanceof TomcatEmbeddedServletContainerFactory) {
                TomcatEmbeddedServletContainerFactory containerFactory =
                        (TomcatEmbeddedServletContainerFactory) container;

                Connector connector = new Connector(TomcatEmbeddedServletContainerFactory.DEFAULT_PROTOCOL);
                connector.setPort(httpPort);
                containerFactory.addAdditionalTomcatConnectors(connector);
            }
        }
    };
}
}