springboot2 springboot 的引导类

SpringBoot 工程提供引导类用来启动程序，SpringBoot 工程启动后创建并初始化 Spring 容器

package com.itheima;

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

@SpringBootApplication //引导类，整个程序的入口，加载Bean
public class Springboot01Application {

    public static void main(String[] args) {
        ConfigurableApplicationContext ctx = SpringApplication.run(Springboot01Application.class, args);//启动了一个Spring容器
        Object bean = ctx.getBean("springboot01Controller");
        System.out.println(bean);
    }

}