pom文件

<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 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><!-- SpringBoot --><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.3.3.RELEASE</version></parent><groupId>com.demo.springboot</groupId><artifactId>springboot-demo</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging>
<!--    <packaging>pom</packaging>-->
<!--    <packaging>war</packaging>--><name>${artifactId}</name><description>springboot工程</description><!-- 属性 --><properties><java.version>1.8</java.version></properties><dependencies><!-- SpringBoot Web模块 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency></dependencies></project>

配置文件

可自行选择properties或者yml

# 服务端口
server.port=8080

# 服务端口
server:port: 8080

启动类

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