JDK8环境下Spring Boot 3.x与Gradle工具链解析插件兼容问题

在JDK8环境中，Spring Boot Gradle插件3.x版本无法与toolchain resolver插件配合使用。尝试通过Gradle工具链自动获取JDK17以满足Spring Boot 3.x对JDK17的要求时，执行构建会失败。

复现配置 #

build.gradle 内容 #

plugins {
    id 'java'
    id 'org.springframework.boot' version '3.0.3'
    id 'io.spring.dependency-management' version '1.1.0'
}
repositories {
    mavenCentral()
}
dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-web'
}
test {
    useJUnitPlatform()
}
sourceCompatibility = 17
targetCompatibility = 17
java {
    toolchain {
        languageVersion = JavaLanguageVersion.of(17)
    }
}

settings.gradle 内容 #

plugins {
    id 'org.gradle.toolchains.foojay-resolver-convention' version '0.4.0' 
}
rootProject.name = 'myAwesomeProject'

构建错误信息 #

执行gradle build时出现如下错误：

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring root project 'myAwesomeProject'.
> Could not resolve all files for configuration ':classpath'.
   > Could not resolve org.springframework.boot:spring-boot-gradle-plugin:3.0.3.
     Required by:
         project : > org.springframework.boot:org.springframework.boot.gradle.plugin:3.0.3
      > No matching variant of org.springframework.boot:spring-boot-gradle-plugin:3.0.3 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 '8.0.1'** but:
          - Variant 'apiElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.0.3 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 '8.0.1')
          - Variant 'javadocElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.0.3 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 8)
                  - Doesn't say anything about its elements (required them packaged as a jar)
                  - Doesn't say anything about org.gradle.plugin.api-version (required '8.0.1')
          - Variant 'mavenOptionalApiElements' capability org.springframework.boot:spring-boot-gradle-plugin-maven-optional:3.0.3 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 '8.0.1')
          - Variant 'mavenOptionalRuntimeElements' capability org.springframework.boot:spring-boot-gradle-plugin-maven-optional:3.0.3 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 '8.0.1')
          - Variant 'runtimeElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.0.3 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 '8.0.1')
          - Variant 'sourcesElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.0.3 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 8)
                  - Doesn't say anything about its elements (required them packaged as a jar)
                  - Doesn't say anything about org.gradle.plugin.api-version (required '8.0.1')

已知情况 #

• 将Spring Boot版本降级至2.7.9后，JDK17可正常下载且构建无问题
• Spring Boot 3.x要求JDK17，因此尝试使用toolchain resolver插件自动获取JDK17
• com.github.rmee.jdk-bootstrap插件可正常工作，但更倾向于使用Gradle官方工具链

疑问 #

若此为bug，应向哪个项目提交工单？

内容的提问来源于stack exchange，提问作者cesarse