idea创建SpringBoot项目

1. 打开idea，点击创建新项目，选择Spring Initializr

2. 点击next，填写Group和Artifact

3. 选择Web，再选择Web复选框

4. 填写Project name，点击finish

5. 打开项目目录，删除以下文件夹和文件

6. 该类是自动生成的，是程序的入口

package com.example.demo;

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

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

7. 创建HelloSpringboot

package com.example.demo;

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@EnableAutoConfiguration
public class HelloSpringboot {

    @RequestMapping("/hello")
    public String say() {
        System.out.println("Hello springboot");
        return "hello,this is a springboot demo";
    }
}

8. 启动DemoApplication

9. 在地址栏中输入http://localhost:8080/hello