java - 如何在play 2.4中使用CommonsMailerPlugin

Question

我刚刚将我的应用程序从 play 2.2 迁移到 play 2.3，现在在从 play 2.3 迁移到 play 2.4 时遇到了麻烦，尤其是使用 CommonsMailerPlugin 时。我收到以下运行时错误:

play.api.UnexpectedException: Unexpected exception[ClassNotFoundException: play.api.libs.mailer.CommonsMailerPlugin]
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1$$anonfun$1.apply(DevServerStart.scala:165) ~[play-server_2.11-2.4.0.jar:2.4.0]
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1$$anonfun$1.apply(DevServerStart.scala:121) ~[play-server_2.11-2.4.0.jar:2.4.0]
at scala.Option.map(Option.scala:146) ~[scala-library-2.11.6.jar:na]
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1.apply(DevServerStart.scala:121) ~[play-server_2.11-2.4.0.jar:2.4.0]
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1.apply(DevServerStart.scala:119) ~[play-server_2.11-2.4.0.jar:2.4.0]
at scala.util.Success.flatMap(Try.scala:230) ~[scala-library-2.11.6.jar:na]
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1.apply(DevServerStart.scala:119) ~[play-server_2.11-2.4.0.jar:2.4.0]
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1.apply(DevServerStart.scala:111) ~[play-server_2.11-2.4.0.jar:2.4.0]
at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) ~[scala-library-2.11.6.jar:na]
at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) ~[scala-library-2.11.6.jar:na]
    Caused by: java.lang.ClassNotFoundException: play.api.libs.mailer.CommonsMailerPlugin
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_45]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_45]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_45]
at java.lang.Class.forName0(Native Method) ~[na:1.8.0_45]
at java.lang.Class.forName(Class.java:348) ~[na:1.8.0_45]
at play.utils.Reflect$.getClass(Reflect.scala:142) ~[play_2.11-2.4.0.jar:2.4.0]
at play.api.Plugins$$anonfun$loadPlugins$1.apply(Plugins.scala:88) ~[play_2.11-2.4.0.jar:2.4.0]
at play.api.Plugins$$anonfun$loadPlugins$1.apply(Plugins.scala:87) ~[play_2.11-2.4.0.jar:2.4.0]
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245) ~[scala-library-2.11.6.jar:na]
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245) ~[scala-library-2.11.6.jar:na]}

Answer 1

只需按照 Play 2.4 Mailer 的说明进行操作即可并从 conf/play.plugins 文件中删除对 Mailer 插件的引用。

就我而言，这是文件中的唯一行，因此我删除了该文件。