spring-boot之HelloWorld

官网教程 https://docs.spring.io/spring-boot/docs/current/reference/html/getting-started.html

1.使用idea创建maven项目

2.在pom.xml中添加以下配置

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.5.2</version>
</parent>

3.添加web依赖

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

4.创建spring-boot入口程序类

App.java

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

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

5.编写控制器代码

MyController.java

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

@RestController
public class MyController
{
    @GetMapping("/")
    public String hello()
    {
        return "Hello,World!";
    }
}

6.启动spring-boot应用

mvn spring-boot:run

访问 http://localhost:8080/

ok！应用启动成功，spring-boot就是这么简单！

spring-boot之HelloWorld

原文：https://www.cnblogs.com/lypzzzzz/p/14956682.html