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说明

本文建立一个最基本的SpringBoot3项目，依赖项仅包含 spring-web（SpringMVC）。

备注：SpringBoot3需要JDK17支持，配置方法参考：
SpringBoot3项目中配置JDK17

项目结构图示

POM

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>3.1.3</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.example</groupId><artifactId>hello-spring-boot3</artifactId><version>1.0</version><name>HelloSpringBoot3</name><description>Demo project for Spring Boot3</description><properties><java.version>17</java.version></properties><dependencies><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></dependencies><dependencyManagement><dependencies><dependency><groupId>org.yaml</groupId><artifactId>snakeyaml</artifactId><version>2.0</version></dependency></dependencies></dependencyManagement><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

启动器：Application

package com.example;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplication
public class HelloSpringBoot3Application {public static void main(String[] args) {SpringApplication.run(HelloSpringBoot3Application.class, args);}}

配置文件：yml

使用的默认配置，未添加任何内容。

控制器：Controller

package com.example.web.controller;import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;@RestController
@RequestMapping("test")
public class TestController {@GetMapping("hello")public String hello() {return "Hello SpringBoot3";}}

接口调用示例