[VS CODE] Spring boot + gradle 개발 환경 구축

1. java 설치
	- jdk 17 버전 다운
    - https://www.oracle.com/java/technologies/javase/jdk17-archive-downloads.html
    - spring boot 3.0 부터는 java 17 버전부터 지원 됨.
    
2. 환경변수 셋팅
	- 이거는 반드시 할 필요는 없음 (여러 jdk 버전을 사용할 경우)
    
3. vs code - extension 설치
	- Extension Pack for Java
	- Spring Boot Tools
	- Spring Initializr Java Support
    - Gradle for Java
    - spring boot dashboard
    
4. spring initializr (https://start.spring.io/) 접속 후 상세 설정 후에 압축파일을 받아서 vscode에서 염

5. 4를 진행한 후 vs code 에서 프로젝트를 연 다음, 터미널에서 명령어 입력
	./gradlew
    
6. spring boot dashboard 에서 apps 실행

* port 변경이 필요한 경우 application.properties 파일에서
    server.port=8081 // 추가해준다.

 

 

 

 

// gradle 오류가 날 경우, (java version error ; java home 을 잘못 찾는 경우)

Could not run phased build action using connection to Gradle distribution 'https://services.gradle.org/distributions/gradle-8.7-bin.zip'.
org.gradle.api.ProjectConfigurationException: A problem occurred configuring root project 'test'.
A problem occurred configuring root project 'test'.
Could not resolve all artifacts for configuration ':classpath'.
Could not resolve org.springframework.boot:spring-boot-gradle-plugin:3.2.5.
Required by:
    project : > org.springframework.boot:org.springframework.boot.gradle.plugin:3.2.5
No matching variant of org.springframework.boot:spring-boot-gradle-plugin:3.2.5 was found. The consumer was configured to find a library for use during runtime, compatible with Java 8, packaged as a jar, and its dependencies declared externally, as well as attribute 'org.gradle.plugin.api-version' with value '8.7' but:
  - Variant 'apiElements' declares a library, packaged as a jar, and its dependencies declared externally:
      - Incompatible because this component declares a component for use during compile-time, compatible with Java 17 and the consumer needed a component for use during runtime, compatible with Java 8
      - Other compatible attribute:
          - Doesn't say anything about org.gradle.plugin.api-version (required '8.7')
  - Variant 'javadocElements' declares a component for use during runtime, and its dependencies declared externally:
      - Incompatible because this component declares documentation and the consumer needed a library
      - Other compatible attributes:
          - Doesn't say anything about its elements (required them packaged as a jar)
          - Doesn't say anything about its target Java version (required compatibility with Java 8)
          - Doesn't say anything about org.gradle.plugin.api-version (required '8.7')
  - Variant 'mavenOptionalApiElements' declares a library, packaged as a jar, and its dependencies declared externally:
      - Incompatible because this component declares a component for use during compile-time, compatible with Java 17 and the consumer needed a component for use during runtime, compatible with Java 8
      - Other compatible attribute:
          - Doesn't say anything about org.gradle.plugin.api-version (required '8.7')
  - Variant 'mavenOptionalRuntimeElements' declares a library for use during runtime, packaged as a jar, and its dependencies declared externally:
      - Incompatible because this component declares a component, compatible with Java 17 and the consumer needed a component, compatible with Java 8
      - Other compatible attribute:
          - Doesn't say anything about org.gradle.plugin.api-version (required '8.7')
  - Variant 'runtimeElements' declares a library for use during runtime, packaged as a jar, and its dependencies declared externally:
      - Incompatible because this component declares a component, compatible with Java 17 and the consumer needed a component, compatible with Java 8
      - Other compatible attribute:
          - Doesn't say anything about org.gradle.plugin.api-version (required '8.7')
  - Variant 'sourcesElements' declares a component for use during runtime, and its dependencies declared externally:
      - Incompatible because this component declares documentation and the consumer needed a library
      - Other compatible attributes:
          - Doesn't say anything about its elements (required them packaged as a jar)
          - Doesn't say anything about its target Java version (required compatibility with Java 8)
          - Doesn't say anything about org.gradle.plugin.api-version (required '8.7')
          
          
// vs code > settings.json 에서 아래 값을 추가해준다.

{
	...
    
    "java.import.gradle.java.home": "C:\\Program Files\\Java\\jdk-17.0.10"
    
    ...
}