[SpringBoot] QuickStart

$ mvn -B archetype:generate -DgroupId=com.example -DartifactId=hajiboot -Dversion=1.0.0-SNAPSHOT -DarchetypeArtifactId=maven-archetype-quickstart

app.java

package com.example;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * Hello world!
 *
 */

@RestController // 이 클래스가 웹 애플리케이션에서 요청(request)을 받아들이는 컨트롤 클래스임을 나타냄
@EnableAutoConfiguration // 다양한 설정이 자동으로 수행되고 기존의 스프링 애플리케이션에서 필요했던 설정 파일들이 필요 없어짐
public class App 
{
    @RequestMapping("/") // 메서드가 HTTP요청을 받아들이는 메서드임을 나타냄
    String home() {
        return "Hello World!!!"; // HTTP 응답을 반환
    }
    public static void main( String[] args )
    {
        // 스피링 부트 애플리케이션을 실행하는데 필요한 처리
        // @EnableAutoConfiguration 가 붙은 클래스를 첫번째 인자로 지정
        SpringApplication.run(App.class, args);
    }
}

pom.xml

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.example</groupId>
  <artifactId>hajiboot</artifactId>
  <packaging>jar</packaging>
  <version>1.0.0-SNAPSHOT</version>
  <name>hajiboot</name>
  <url>http://maven.apache.org</url>

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.0.RELEASE</version>
  </parent>

  <dependencies>
    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
      <version>2.0.0.RELEASE</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <version>2.0.0.RELEASE</version>
      <scope>test</scope>
    </dependency>

    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>

  <build>
    <plugins>
      <plugin>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-maven-plugin</artifactId>
          <version>2.0.0.RELEASE</version>
      </plugin>
    </plugins>
  </build>

  <properties>
    <java.version>1.8</java.version>
  </properties>
</project>

src/main/resources/application.properties

server.port=8888

$ mvn spring-boot:run

open browser with localhost:8888