基于springboot写一个helloworld

Sure, here is a simple example of a Spring Boot application that prints "Hello, World!" to the console:

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class HelloWorldApplication {

    public static void main(String[] args) {
        SpringApplication.run(HelloWorldApplication.class, args);
        System.out.println("Hello, World!");
    }

}

This application uses Spring Boot's auto-configuration to set up a basic web application context, and then prints the "Hello, World!" message to the console.