NoClassDefFoundError: java.sql.Date 当使用 gradle 插件运行 Play 2.6

Question

有没有人对play gradle插件有运气？ 我正在尝试运行 Play 框架 2.6 入门项目。 我可以很好地从 SBT 运行，但是当我从 gradle 运行时出现以下错误：

play.api.UnexpectedException: Unexpected exception[NoClassDefFoundError: java/sql/Date]
        at play.core.server.DevServerStart$$anon$1.reload(DevServerStart.scala:190)
        at play.core.server.DevServerStart$$anon$1.get(DevServerStart.scala:124)
        at play.core.server.AkkaHttpServer.handleRequest(AkkaHttpServer.scala:202)
        at play.core.server.AkkaHttpServer.$anonfun$createServerBinding$1(AkkaHttpServer.scala:117)
        at akka.stream.impl.fusing.MapAsync$$anon$25.onPush(Ops.scala:1194)
        at akka.stream.impl.fusing.GraphInterpreter.processPush(GraphInterpreter.scala:519)
        at akka.stream.impl.fusing.GraphInterpreter.processEvent(GraphInterpreter.scala:482)
        at akka.stream.impl.fusing.GraphInterpreter.execute(GraphInterpreter.scala:378)
        at akka.stream.impl.fusing.GraphInterpreterShell.runBatch(ActorGraphInterpreter.scala:

我正在使用Java 1.8和以下build.gradle：

plugins {
    id 'play'
    id 'idea'
}
def playVersion = "2.6.13"
def scalaVersion = System.getProperty("scala.binary.version", /* default = */ "2.12")
model {
    components {
        play {
            platform play: playVersion, scala: scalaVersion, java: '1.8'
            injectedRoutesGenerator = true
            sources {
                twirlTemplates {
                    defaultImports = TwirlImports.JAVA
                }   
            }   
        }   
    }   
}
dependencies {
    play "com.typesafe.play:play-guice_$scalaVersion:$playVersion"
    play "com.typesafe.play:play-logback_$scalaVersion:$playVersion"
    play "com.h2database:h2:1.4.196"
    playTest "org.assertj:assertj-core:3.6.2"
    playTest "org.awaitility:awaitility:2.0.0"
}
repositories {
    jcenter()
    maven {
        name "lightbend-maven-releases"
        url "https://repo.lightbend.com/lightbend/maven-release"
    }   
    ivy {
        name "lightbend-ivy-release"
        url "https://repo.lightbend.com/lightbend/ivy-releases"
        layout "ivy"
    }   
}

Answer 1

您需要将java_home设置为使用 Java 1.8 版本。显然，Play gradle插件期待一个java家。

export JAVA_HOME=YOUR_JAVA_LOCATION

---

$ source .bash_profile
$ echo $JAVA_HOME

Answer 2

我发现了这个问题，我的$JAVA_HOME被设置为我的Java 9路径，但java/javac设置为Java 8。这导致我的 gradle 使用了错误的 java 版本。修复我的 $JAVA_HOME 后，它可以正常工作。

我会留下这个，以防其他人遇到这个问题。