spring boot -- helloworld

1.在idea中创建maven项目


2.在pom.xml中添加依赖

    <packaging>pom</packaging>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.0.RELEASE</version>
    </parent>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

3.新建子工程


4.在子工程中创建controller

package com.sfencs.first;


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

@RestController
public class TestController {

    @RequestMapping("hello")
    public String hello() {
        return "hello world";
    }
}

5.创建springboot启动类

package com.sfencs.first;

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

@SpringBootApplication
public class SpringBootApp {

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

6.运行启动类main函数

浏览器输入http://localhost:8080/hello