해결방법

  1. Spring 3.x에서는 jdk17이상을 사용
  2. SDK 설정
  3. language level 설정
  4. Gradle JVM 또한 설정

문제

A problem occurred configuring root project 'board'.
> Could not resolve all files for configuration ':classpath'.
   > Could not resolve org.springframework.boot:spring-boot-gradle-plugin:3.1.2.
     Required by:
         project : > org.springframework.boot:org.springframework.boot.gradle.plugin:3.1.2
      > No matching variant of org.springframework.boot:spring-boot-gradle-plugin:3.1.2 was found. The consumer was configured to find a library for use during runtime, compatible with Java 11, packaged as a jar, and its dependencies declared externally, as well as attribute 'org.gradle.plugin.api-version' with value '8.1.1' but:
          - Variant 'apiElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.1.2 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 11
              - Other compatible attribute:
                  - Doesn't say anything about org.gradle.plugin.api-version (required '8.1.1')
          - Variant 'javadocElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.1.2 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 target Java version (required compatibility with Java 11)
                  - Doesn't say anything about its elements (required them packaged as a jar)
                  - Doesn't say anything about org.gradle.plugin.api-version (required '8.1.1')
          - Variant 'mavenOptionalApiElements' capability org.springframework.boot:spring-boot-gradle-plugin-maven-optional:3.1.2 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 11
              - Other compatible attribute:
                  - Doesn't say anything about org.gradle.plugin.api-version (required '8.1.1')
          - Variant 'mavenOptionalRuntimeElements' capability org.springframework.boot:spring-boot-gradle-plugin-maven-optional:3.1.2 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 11
              - Other compatible attribute:
                  - Doesn't say anything about org.gradle.plugin.api-version (required '8.1.1')
          - Variant 'runtimeElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.1.2 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 11
              - Other compatible attribute:
                  - Doesn't say anything about org.gradle.plugin.api-version (required '8.1.1')
          - Variant 'sourcesElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.1.2 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 target Java version (required compatibility with Java 11)
                  - Doesn't say anything about its elements (required them packaged as a jar)
                  - Doesn't say anything about org.gradle.plugin.api-version (required '8.1.1')

* Try:
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.

* Exception is:
...

springframework의 일부 dependency에서 java11을 호환하지 않는 오류.

Spring 3.x부터는 jdk17 이상의 버전을 사용하며, jdk11은 Spring 2.x에서 사용 가능하다.

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start.spring.io에서 jdk17로 설정하고 다시 generate,

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intellij의 project Structure에서 JDK를 다시 설정해주면

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여전히 되지 않는다.

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SDK또한 정상적으로 설치된 것을 확인

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gradle JVM의 버전이 11로 되어있었다. 17로 수정.