PlayFramework NoClassDefFoundError: jdk/nashorn/api/scripting/NashornScriptEngineFactory

Question

调用 NashornScriptEngineFactory 会在简单的 PlayFramework 应用程序上产生 RuntimeException。

build.sbt

lazy val root = (project in file(".")).enablePlugins(PlayScala)

scalaVersion := "2.11.6"

scalacOptions += "-target:jvm-1.8"

Application.scala

import jdk.nashorn.api.scripting.NashornScriptEngineFactory
import play.api.mvc._

object Application extends Controller
{
    def index = Action
    {
        val nashorn = new NashornScriptEngineFactory().getScriptEngine( "-scripting" )
        Ok( nashorn.eval( "3;" ).toString )
    }
}

然而，在类似的 sbt 项目中，它有效：

Main.scala

import jdk.nashorn.api.scripting.NashornScriptEngineFactory

object Main extends App
{
    val nashorn = new NashornScriptEngineFactory().getScriptEngine( "-scripting" )

    println( nashorn.eval( "4;" ) )
}

为什么 play 无法加载所需的工厂？

Stacktrace

[error] application - 

! @6locb3604 - Internal server error, for (GET) [/] ->

play.api.Application$$anon: Execution exception[[RuntimeException: java.lang.NoClassDefFoundError: jdk/nashorn/api/scripting/NashornScriptEngineFactory]]
    at play.api.Application$class.handleError(Application.scala:296) ~[play_2.11-2.3.8.jar:2.3.8]
    at play.api.DefaultApplication.handleError(Application.scala:402) [play_2.11-2.3.8.jar:2.3.8]
    at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$$anonfun$apply.applyOrElse(PlayDefaultUpstreamHandler.scala:205) [play_2.11-2.3.8.jar:2.3.8]
    at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$$anonfun$apply.applyOrElse(PlayDefaultUpstreamHandler.scala:202) [play_2.11-2.3.8.jar:2.3.8]
    at scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:36) [scala-library-2.11.6.jar:na]
Caused by: java.lang.RuntimeException: java.lang.NoClassDefFoundError: jdk/nashorn/api/scripting/NashornScriptEngineFactory
    at play.api.mvc.ActionBuilder$$anon.apply(Action.scala:523) ~[play_2.11-2.3.8.jar:2.3.8]
    at play.api.mvc.Action$$anonfun$apply$$anonfun$apply$$anonfun$apply.apply(Action.scala:130) ~[play_2.11-2.3.8.jar:2.3.8]
    at play.api.mvc.Action$$anonfun$apply$$anonfun$apply$$anonfun$apply.apply(Action.scala:130) ~[play_2.11-2.3.8.jar:2.3.8]
    at play.utils.Threads$.withContextClassLoader(Threads.scala:21) ~[play_2.11-2.3.8.jar:2.3.8]
    at play.api.mvc.Action$$anonfun$apply$$anonfun$apply.apply(Action.scala:129) ~[play_2.11-2.3.8.jar:2.3.8]
Caused by: java.lang.NoClassDefFoundError: jdk/nashorn/api/scripting/NashornScriptEngineFactory
    at controllers.Application$$anonfun$index.apply(Application.scala:10) ~[classes/:na]
    at controllers.Application$$anonfun$index.apply(Application.scala:9) ~[classes/:na]
    at play.api.mvc.ActionBuilder$$anonfun$apply.apply(Action.scala:464) ~[play_2.11-2.3.8.jar:2.3.8]
    at play.api.mvc.ActionBuilder$$anonfun$apply.apply(Action.scala:464) ~[play_2.11-2.3.8.jar:2.3.8]
    at play.api.mvc.ActionBuilder$$anonfun$apply.apply(Action.scala:433) ~[play_2.11-2.3.8.jar:2.3.8]
Caused by: java.lang.ClassNotFoundException: jdk.nashorn.api.scripting.NashornScriptEngineFactory
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_40]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_40]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_40]
    at controllers.Application$$anonfun$index.apply(Application.scala:10) ~[classes/:na]
    at controllers.Application$$anonfun$index.apply(Application.scala:9) ~[classes/:na]

Answer 1

这与 https://github.com/playframework/playframework/pull/3420 有关并且在游戏 2 中有效。4.x!

addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.4.0-M3")

PlayFramework NoClassDefFoundError: jdk/nashorn/api/scripting/NashornScriptEngineFactory

PlayFramework NoClassDefFoundError: jdk/nashorn/api/scripting/NashornScriptEngineFactory

scala

playframework

java-8

nashorn