將 Spring Boot Gradle 項目導入 Eclipse 時遇到問題

Question

我有一個 Sprint Boot 項目，它是在另一個系統上構建的，我正嘗試將其導入到 Eclipse (4.20.0) 中的新系統中，但我遇到了一些問題。 這是一個 Gradle Spring Boot。 我的 build.gradle 文件在下面。 我在機器上安裝了 JKD 16.0.1——Windows 10。

我嘗試使用 Gradle buildship 和 STS 插件導入它。 當我嘗試 Buildship 時，它在導入預覽中失敗，並帶有一個大堆棧轉儲，頂行是：

org.gradle.tooling.BuildException: Could not fetch model of type 'GradleBuild' using connection to Gradle distribution 'https://services.gradle.org/distributions/gradle-6.8.3-bin.zip'.

當我嘗試 Gradle STS 時，當我點擊“構建模型”按鈕時，我告訴我出現了錯誤並檢查日志文件。 我在那里發現的有趣的事情是：

!ENTRY org.springsource.ide.eclipse.gradle.core 4 0 2021-06-18 17:38:25.575
!MESSAGE Could not determine java version from '16.0.1'.
!STACK 0
java.lang.IllegalArgumentException: Could not determine java version from '16.0.1'.

!MESSAGE Initialize project OrderCreate, Update preview failed due to an error in the referenced Gradle build.
!STACK 0
org.gradle.tooling.BuildException: Could not fetch model of type 'GradleBuild' using connection to Gradle distribution 'https://services.gradle.org/distributions/gradle-6.8.3-bin.zip'.

Caused by: org.gradle.internal.exceptions.LocationAwareException: Initialization script 'C:\Workspaces\Java\K2\.metadata\.plugins\org.eclipse.buildship.core\init.d\eclipsePlugin.gradle'
Could not compile initialization script 'C:\Workspaces\Java\K2\.metadata\.plugins\org.eclipse.buildship.core\init.d\eclipsePlugin.gradle'.

Caused by: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
General error during semantic analysis: Unsupported class file major version 60

java.lang.IllegalArgumentException: Unsupported class file major version 60

!ENTRY org.springsource.ide.eclipse.gradle.core 4 0 2021-06-18 17:45:56.693
!MESSAGE Could not determine java version from '16.0.1'.
!STACK 0
java.lang.IllegalArgumentException: Could not determine java version from '16.0.1'.
!MESSAGE Not properly disposed SWT resource
!STACK 0
java.lang.Error: SWT Resource was not properly disposed

!MESSAGE Not properly disposed SWT resource
!STACK 0
java.lang.Error: SWT Resource was not properly disposed

我還嘗試從終端構建它以獲取一些線索。 這給了我“不支持的類文件主要版本 60”錯誤。

Could not compile settings file 'C:\Workspaces\Java\K2\OrderCreate\settings.gradle'.
> startup failed:
  General error during semantic analysis: Unsupported class file major version 60

這看起來真是一團糟。 我從哪里開始解決這個問題？

plugins {
    id 'org.springframework.boot' version '2.4.5'
    id 'io.spring.dependency-management' version '1.0.11.RELEASE'
    id 'java'
    id 'eclipse'
    id "com.diffplug.eclipse.apt" version "3.29.1"
}

group = 'com.bw'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '11'

repositories {
    mavenCentral()
}

ext {
    mapstructVersion = "1.4.2.Final"
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-artemis'
    implementation 'org.springframework.boot:spring-boot-starter-data-mongodb-reactive'
    implementation 'org.springframework.boot:spring-boot-starter-webflux'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
    testImplementation 'io.projectreactor:reactor-test'
    
    implementation("org.mapstruct:mapstruct:${mapstructVersion}")
    compileOnly "org.mapstruct:mapstruct-processor:${mapstructVersion}"
    annotationProcessor "org.mapstruct:mapstruct-processor:${mapstructVersion}"
    testAnnotationProcessor "org.mapstruct:mapstruct-processor:${mapstructVersion}"
    
    implementation('org.springframework.boot:spring-boot-starter-data-mongodb')
    testImplementation('de.flapdoodle.embed:de.flapdoodle.embed.mongo')
    implementation 'org.springframework.boot:spring-boot-starter-websocket'
    
    compile group: 'com.google.code.gson', name: 'gson', version: '2.8.5'
}

test {
    useJUnitPlatform()
}

來自 Gradle Buildship 的錯誤：

org.gradle.tooling.BuildException: Could not fetch model of type 'GradleBuild' using connection to Gradle distribution 'https://services.gradle.org/distributions/gradle-6.8.3-bin.zip'.
    at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)

at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)
Caused by: org.gradle.internal.exceptions.LocationAwareException: Initialization script 'C:\Workspaces\Java\K2\.metadata\.plugins\org.eclipse.buildship.core\init.d\eclipsePlugin.gradle'
Could not compile initialization script 'C:\Workspaces\Java\K2\.metadata\.plugins\org.eclipse.buildship.core\init.d\eclipsePlugin.gradle'.
    
at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
Caused by: org.gradle.groovy.scripts.ScriptCompilationException: Could not compile initialization script 'C:\Workspaces\Java\K2\.metadata\.plugins\org.eclipse.buildship.core\init.d\eclipsePlugin.gradle'.
    at 

Caused by: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
General error during semantic analysis: Unsupported class file major version 60

java.lang.IllegalArgumentException: Unsupported class file major version 60
    at groovyjarjarasm.asm.ClassReader.<init>(ClassReader.java:196)
    at groovyjarjarasm.asm.ClassReader.<init>(ClassReader.java:177)
    at groovyjarjarasm.asm.ClassReader.<init>(ClassReader.java:163)
    at groovyjarjarasm.asm.ClassReader.<init>(ClassReader.java:284)
    at org.codehaus.groovy.ast.decompiled.AsmDecompiler.parseClass(AsmDecompiler.java:81)
    at org.codehaus.groovy.control.ClassNodeResolver.findDecompiled(ClassNodeResolver.java:251)
    at org.codehaus.groovy.control.ClassNodeResolver.tryAsLoaderClassOrScript(ClassNodeResolver.java:189)

Answer 1

看起來您使用的 Gradle 6.x 不支持在 Java 16 上運行。您可以降級到 Java 15 或更早版本或升級到 Gradle 7.x。

如果您降級 Java，您仍然可以使用 Gradle 的工具鏈支持在 Java 16 上構建和運行您的應用程序。

如果你升級到 Gradle 7.x，你還應該升級到 Spring Boot 2.5.x，它增加了對 Gradle 7 的支持。