【入门篇一】HelloWorld演示（2）

一、线上初始化：https://start.spring.io/

File -> New -> Project...

二、创建Maven项目

创建完成后修改pom.xml：

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <!--Spring Boot的父依赖-->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>com.linhw</groupId>
    <artifactId>helloworld</artifactId>
    <version>1.0-SNAPSHOT</version>
    <!-- SpringBoot的打包方式：pom/jar/war-->
    <packaging>jar</packaging>

    <properties>
        <!-- JDK 1.8 -->
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <!-- 核心启动器, 包括auto-configuration、logging and YAML -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <!-- testing Spring Boot applications with libraries including JUnit, Hamcrest and Mockito -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

常见SpringBoot的启动类：

package com.linhw.demo;

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

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

在src/main/resources下创建application.properties或application.yml

注：因为不是web项目，所以启动后就会马上停止。