HTTPS - Spring Boot 2 - Nginx

application.yml

#Keystore type
server.ssl.key-store-type: PKCS12
#Path to the keystore
server.ssl.key-store: /etc/letsencrypt/live/mydomain.com/keystore.p12
#Keystore password
server.ssl.key-store-password: YourKeyStorePassword
#Alias mapped to the certificate
server.ssl.key-alias: mydomainkeyalias
#Spring Boot on HTTPS only
server.port: 8443

#HTTP port
http.port: 8080

HTTPSConfiguration.java

@Configuration
public class HTTPSConfiguration {

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

    // Let's configure additional connector to enable support for both HTTP and HTTPS
    @Bean
    public ServletWebServerFactory servletContainer() {
        TomcatServletWebServerFactory tomcat = new TomcatServletWebServerFactory();
        tomcat.addAdditionalTomcatConnectors(createStandardConnector());
        return tomcat;
    }

    private Connector createStandardConnector() {
        Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol");
        connector.setPort(httpPort);
        return connector;
    }
}