1.在idea中新建一個空項目，添加一個Spring Initializr模塊

2.在pom.xml中添加以下配置

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

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

3.在自動生成的java package下新建一個control包，寫一個controller類

@RestController
public class HelloController {
    @RequestMapping(value="/hello",method = RequestMethod.GET)
    public String getHello(){
        return"Hello Spring Boot";
    }
}

（類上面RestController注解不要遺漏）

4.運行DemoApplication類（模塊創(chuàng)建自動生成）