Question

我刚刚开始使用Java Play框架并向前迈出了一步，但现在我打算添加JavaEbean OEM，并仔细阅读了文档，但仍然收到错误 NoClassDefFoundError：播放/配置

application.conf

.Resize(.Rows.Count - 1, 5)

plugins.sbt

    # This is the main configuration file for the application.
    # https://www.playframework.com/documentation/latest/ConfigFile

    ebean.default = ["models.*"]

我的模特：

addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.7.0")
addSbtPlugin("com.typesafe.sbt" % "sbt-play-ebean" % "4.1.0")

build.sbt

import io.ebean.Model;

public class Book extends Model {..}

我从sbt开始，进行了更新，一切都很好，但是如果我进行编译，则会收到以下错误：

name := """BookStoreApp"""
organization := "com.example"

version := "1.0-SNAPSHOT"

lazy val root = (project in file(".")).enablePlugins(PlayJava, PlayEbean)

scalaVersion := "2.12.8"

libraryDependencies += guice

如果我运行sbt，则运行im出现与上述相同的错误，并且：

[error] java.lang.NoClassDefFoundError: play/Configuration
[error]         at play.db.ebean.ModelsConfigLoader.apply(ModelsConfigLoader.java:27)
[error]         at play.db.ebean.ModelsConfigLoader.apply(ModelsConfigLoader.java:21)
[error]         at play.ebean.sbt.PlayEbean$.$anonfun$configuredEbeanModels$4(PlayEbean.scala:153)
[error]         at play.ebean.sbt.PlayEbean$.withClassLoader$1(PlayEbean.scala:130)
[error]         at play.ebean.sbt.PlayEbean$.$anonfun$configuredEbeanModels$1(PlayEbean.scala:150)
[error]         at scala.Function1.$anonfun$compose$1(Function1.scala:44)
[error]         at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:40)
[error]         at sbt.std.Transform$$anon$4.work(System.scala:67)
[error]         at sbt.Execute.$anonfun$submit$2(Execute.scala:269)
[error]         at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:16)
[error]         at sbt.Execute.work(Execute.scala:278)
[error]         at sbt.Execute.$anonfun$submit$1(Execute.scala:269)
[error]         at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:178)
[error]         at sbt.CompletionService$$anon$2.call(CompletionService.scala:37)
[error]         at java.util.concurrent.FutureTask.run(Unknown Source)
[error]         at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
[error]         at java.util.concurrent.FutureTask.run(Unknown Source)
[error]         at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
[error]         at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
[error]         at java.lang.Thread.run(Unknown Source)
[error] Caused by: java.lang.ClassNotFoundException: play.Configuration
[error]         at java.net.URLClassLoader.findClass(Unknown Source)
[error]         at java.lang.ClassLoader.loadClass(Unknown Source)
[error]         at java.lang.ClassLoader.loadClass(Unknown Source)
[error]         at play.db.ebean.ModelsConfigLoader.apply(ModelsConfigLoader.java:27)
[error]         at play.db.ebean.ModelsConfigLoader.apply(ModelsConfigLoader.java:21)
[error]         at play.ebean.sbt.PlayEbean$.$anonfun$configuredEbeanModels$4(PlayEbean.scala:153)
[error]         at play.ebean.sbt.PlayEbean$.withClassLoader$1(PlayEbean.scala:130)
[error]         at play.ebean.sbt.PlayEbean$.$anonfun$configuredEbeanModels$1(PlayEbean.scala:150)
[error]         at scala.Function1.$anonfun$compose$1(Function1.scala:44)
[error]         at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:40)
[error]         at sbt.std.Transform$$anon$4.work(System.scala:67)
[error]         at sbt.Execute.$anonfun$submit$2(Execute.scala:269)
[error]         at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:16)
[error]         at sbt.Execute.work(Execute.scala:278)
[error]         at sbt.Execute.$anonfun$submit$1(Execute.scala:269)
[error]         at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:178)
[error]         at sbt.CompletionService$$anon$2.call(CompletionService.scala:37)
[error]         at java.util.concurrent.FutureTask.run(Unknown Source)
[error]         at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
[error]         at java.util.concurrent.FutureTask.run(Unknown Source)
[error]         at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
[error]         at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
[error]         at java.lang.Thread.run(Unknown Source)
[error] (Compile / playEbeanModels) java.lang.NoClassDefFoundError: play/Configuration
[error] Total time: 7 s, completed 22.02.2019 10:07:26

Answer 1

您需要更改play或ebean版本。

play更改了2.7中的默认Configuration类：https://www.playframework.com/documentation/2.7.x/JavaConfigMigration26。

ebean插件版本及其与play的对应关系： https://github.com/playframework/play-ebean#releases

所以下一个

addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.7.0")
addSbtPlugin("com.typesafe.sbt" % "sbt-play-ebean" % "4.1.0")

必须更改为

addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.6.21")
addSbtPlugin("com.typesafe.sbt" % "sbt-play-ebean" % "4.1.0")

或

addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.7.0")
addSbtPlugin("com.typesafe.sbt" % "sbt-play-ebean" % "5.0.0")

Java Play框架-NoClassDefFoundError：播放/配置

1 个答案: