원도우에서 VSCode를 사용하여 Spring Boot 프로젝트를 생성하는 방법

원도우에서 Visual Studio Code(VS Code)를 사용하여 Spring Boot 프로젝트를 생성하는 방법

1. 필수 소프트웨어 설치

VS Code 설치

Java Development Kit (JDK) 설치

Gradle 설치

2. Spring Initializr로 프로젝트 생성

vscode에서 F1 누르면 커맨드 팔레트(Command palette)가 나타납니다.

커맨드 팔레트에서 "spring"으로 검색하여 아래와 같이 프로젝트를 생성합니다.

1. 프로젝트 생성(Gradle) : Spring Initializr: Create a Gradle Project
2. 스프링 부트 버전 선택 : 3.4.0
3. 프로젝트 언어 선택 : Java
4. Group Id 입력 : com.example
5. Artifact Id 입력 : demo
6. 패키지 타입 선택 : Jar
7. Jave 버전 선택 : 21
8. 의존성 설정 : Spring Boot DevTools, Spring Web, Lombok

DemoApplication.java 편집

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@SpringBootApplication
public class DemoApplication {

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

	@GetMapping(value = "/")
	public String doGetHelloWorld() {
		return "Hello World";
	}

	@GetMapping(value = "/demo")
	public String doGetHelloWorldDemo() {
		return "Hello World (Demo)";
	}
}

gradlew 빌드

./gradlew build

Java HotSpot(TM) 64-Bit Server VM warning: Sharing is only supported for boot loader classes because bootstrap classpath has been appended

BUILD SUCCESSFUL in 5s
7 actionable tasks: 4 executed, 3 up-to-date

java -jar build/libs/demo-0.0.1-SNAPSHOT.jar

SpringBoot

Invoke-WebRequest를 사용하여 HTTP 상태를 확인

Invoke-WebRequest -Uri "http://localhost:8080"

StatusCode        : 200
StatusDescription :
Content           : Hello World
RawContent        : HTTP/1.1 200
                    Keep-Alive: timeout=60
                    Connection: keep-alive
                    Content-Length: 11
                    Content-Type: text/plain;charset=UTF-8
                    Date: Mon, 09 Dec 2024 05:10:28 GMT

                    Hello World
Forms             : {}
Headers           : {[Keep-Alive, timeout=60], [Connection, keep-alive], [Content-Length, 11], [Content-Type, text/plain;charset=UTF-8]...}
Images            : {}
InputFields       : {}
Links             : {}
ParsedHtml        : mshtml.HTMLDocumentClass
RawContentLength  : 11

http://localhost:8080/

SpringBoot

Spring Initalizr

https://start.spring.io

SpringBoot

DemoApplication.java 편집

demo\src\main\java\com\example\demo\DemoApplication.java

package com.example.demo;

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.UUID;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
public class DemoApplication {

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

@RestController
class HelloWorldController {

    @GetMapping("/")
    public String home() {
        StringBuilder response = new StringBuilder();

        // Current Date and Time
        LocalDateTime currentDateTime = LocalDateTime.now();
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        String formattedDateTime = currentDateTime.format(formatter);

        // Hostname and IP Address
        String hostname = "Unknown";
        String ipAddress = "Unknown";
        try {
            InetAddress inetAddress = InetAddress.getLocalHost();
            hostname = inetAddress.getHostName();
            ipAddress = inetAddress.getHostAddress();
        } catch (UnknownHostException e) {
            // Log the error for debugging purposes
            System.err.println("Failed to get host information: " + e.getMessage());
        }

        // Instance Directory
        String instanceDir = System.getProperty("user.dir");

        // Generate a random session ID (for demo purposes)
        String sessionId = UUID.randomUUID().toString();

        // Build the response
        response.append("<h1>Hello, World from Blue-Green Deployment!!!</h1>")
                .append("<p><b>Hostname:</b> ").append(hostname).append("</p>")
                .append("<p><b>IP Address:</b> ").append(ipAddress).append("</p>")
                .append("<p><b>Instance Directory:</b> ").append(instanceDir).append("</p>")
                .append("<p><b>Instance ID:</b> ").append(sessionId).append("</p>")
                .append("<p><b>Current time:</b> ").append(formattedDateTime).append("</p>");

        return response.toString();
    }
}

---

package com.example.demo;

import java.io.File;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.UUID;

@SpringBootApplication
public class DemoApplication {

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

@RestController
class HelloWorldController {

    @GetMapping("/")
    public String home() throws UnknownHostException {
        LocalDateTime currentDateTime = LocalDateTime.now();
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        String formattedDateTime = currentDateTime.format(formatter);

        String hostname = InetAddress.getLocalHost().getHostName();
        String ipAddress = InetAddress.getLocalHost().getHostAddress();

        // Get instance directory (assuming user.dir points to it)
        String instanceDir = System.getProperty("user.dir");

		// 세션 정보를 쿠키에 저장
		String sessionId = UUID.randomUUID().toString();

        return "<br>" +
			"Hello, World from Blue-Green Deployment!!!<br>" +
			"<br>" +
			"Hostname: " + hostname + "<br>" +
			"IP Address: " + ipAddress + "<br>" +
			"<br>" +
			"Instance Directory: " + instanceDir + "<br>" +
			"Instance ID: " + sessionId  + "<br>" +
			"Current time: " + formattedDateTime;
    }
}

---

http://localhost:8080/

SpringBoot