1. 開啟idea，點選建立新專案，選擇Spring Initializr

2. 點選next，填寫Group和Artifact

3. 選擇Web，再選擇Web複選框

4. 填寫Project name，點選finish

5. 開啟專案目錄，刪除以下資料夾和檔案

6. 該類是自動生成的，是程式的入口

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. 建立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. 啟動DemoApplication

9. 在位址列中輸入http://localhost:8080/hello