1.新建项目，选择Spring Initializr

2.直接finish，然后就等待下载各种包，大约10分钟左右

3.包变绿后，pom.xml中导入web依赖

		<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>2.5.6</version>
        </dependency>

4.新建controller包，新建HelloController类

5.HelloController类

package com.kuang.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

    @RequestMapping("/hello")
    public String hello() {
        return "Hello World";
    }

}

6.运行，访问8080，一个接口就成功了