启动Play报错“play.core.server.DevServerStart”的解决办法_Java_甘焕的博客-CSDN博客

安宇雨 - 随手采集
2020-02-24 09:38:12
随手采集
0000-未整理-等待研究

启动Play框架，提示如下错误：

[error] java.lang.ClassNotFoundException: play.core.server.DevServerStart
[error]     at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:466)
[error]     at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:566)
[error]     at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:499)
[error]     at play.runsupport.Reloader$.startDevMode(Reloader.scala:226)
[error]     at play.sbt.run.PlayRun$.devModeServer$lzycompute$1(PlayRun.scala:95)
[error]     at play.sbt.run.PlayRun$.devModeServer$1(PlayRun.scala:79)
[error]     at play.sbt.run.PlayRun$.$anonfun$playRunTask$3(PlayRun.scala:102)
[error]     at play.sbt.run.PlayRun$.$anonfun$playRunTask$3$adapted(PlayRun.scala:65)
[error]     at scala.Function1.$anonfun$compose$1(Function1.scala:44)
[error] (Compile / run) java.lang.ClassNotFoundException: play.core.server.DevServerStart
[error] Total time: 3 s, completed 2018年8月23日 下午6:23:10

整理build.sbt文件，发现如下内容：

libraryDependencies := Seq(
    "org.scalactic" %% "scalactic" % "3.0.5" % "test",
    "org.scalatest" %% "scalatest" % "3.0.5" % "test",
    jdbc,
    ehcache,
    ws,
    guice
 )

将“:=”改为“++=”，如下：

 libraryDependencies ++= Seq(
    "org.scalactic" %% "scalactic" % "3.0.5" % "test",
    "org.scalatest" %% "scalatest" % "3.0.5" % "test",
    jdbc,
    ehcache,
    ws,
    guice
)

再次运行，发现新载入了2个包后，服务顺利运行，如下：

https://repo1.maven.org/maven2/com/typesafe/play/play-docs_2.12/2.6.18/play-docs_2.12-2.6.18.jar
https://repo1.maven.org/maven2/com/typesafe/play/play-omnidoc_2.12/2.6.18/play-omnidoc_2.12-2.6.18.jar