Spring Boot Standalone Application

java spring

Disable WebContainer

Since Spring 2.0.0, Spring provides WebApplicationType Enum to give more controls of SpringApplication. Currently it supports the following types:

• None: The application should not run as a web application and should not start an embedded web servicer.
• REACTIVE: The application should run as a reactive web application and should start an embedded reactive web server.
• SERVLET: THe application should run as a servlet-based web application and should start an embedded servlet web server.

spring.main.web-application-type=none

Implement the CommandLineRunner interface

Here an example. For detail to check on the github.

package com.navysu.java.basic;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class JavaBasicApplication implements CommandLineRunner {
	
	@Autowired
	private MyBootStarter starter;

	public static void main(String[] args) {
		SpringApplication.run(JavaBasicApplication.class, args);
	}

	@Override
	public void run(String... args) throws Exception {
		for (String arg: args) {
			System.out.println(arg);
		}
		starter.sayHello();

Written on January 19, 2022