Question

我尝试将play框架（java版本）与maven和intellij想法集成。为此，我使用play2-maven-plugin（https://code.google.com/p/play2-maven-plugin/）;

我创建了pom文件，如手册中所述。现在pom文件看起来像这样：

<project xmlns="http://maven.apache.org/POM/4.0.0"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

   <modelVersion>4.0.0</modelVersion>
   <groupId>org.sigmaps</groupId>
   <artifactId>afrodita</artifactId>
   <version>1.0.0-SNAPSHOT</version>
   <packaging>play2</packaging>

   <name>Afrodita</name>

   <repositories>
       <repository>
           <id>typesafe</id>
           <name>Typesafe - releases</name>
           <url>http://repo.typesafe.com/typesafe/releases/</url>
           <snapshots>
               <enabled>false</enabled>
           </snapshots>
       </repository>
   </repositories>

   <properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
       <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

       <play2.version>2.3.3</play2.version>
       <scala.version>2.10.4</scala.version>

       <play2.plugin.version>1.0.0-alpha8</play2.plugin.version>
       <sbt-compiler.plugin.version>1.0.0-beta4</sbt-compiler.plugin.version>
   </properties>

   <dependencies>
       <dependency>
           <groupId>org.scala-lang</groupId>
           <artifactId>scala-library</artifactId>
           <version>${scala.version}</version>
       </dependency>

       <dependency>
           <groupId>com.typesafe.play</groupId>
           <artifactId>play_2.10</artifactId>
           <version>${play2.version}</version>
       </dependency>

       <dependency>
           <groupId>com.typesafe.play</groupId>
           <artifactId>play-java_2.10</artifactId>
           <version>${play2.version}</version>
       </dependency>


   </dependencies>

   <build>
       <sourceDirectory>${basedir}/app</sourceDirectory>
       <resources>
           <resource>
               <directory>${basedir}/conf</directory>
           </resource>
           <resource>
               <directory>${basedir}</directory>
               <includes>
                   <include>public/**</include>
               </includes>
           </resource>
       </resources>

       <plugins>
           <plugin>
               <groupId>com.google.code.play2-maven-plugin</groupId>
               <artifactId>play2-maven-plugin</artifactId>
               <version>${play2.plugin.version}</version>
               <extensions>true</extensions>
           </plugin>
       </plugins>
   </build>

在intellij Idea中，在Maven项目标签上点击插件=＆gt; play2 =＆gt; paly2：运行

然后给出错误：

[INFO] [play2:run {execution: default-cli}]
[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] null
[INFO] ------------------------------------------------------------------------
[INFO] Trace
java.lang.NullPointerException
    at com.google.code.play2.plugin.AbstractPlay2ServerMojo.getProjectClassPath(AbstractPlay2ServerMojo.java:151)    [INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building Afrodita
[INFO]    task-segment: [com.google.code.play2-maven-plugin:play2-maven-plugin:1.0.0-alpha8:run]
[INFO] ------------------------------------------------------------------------
[INFO] [play2:run {execution: default-cli}]
[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] null
[INFO] ------------------------------------------------------------------------
[INFO] Trace
java.lang.NullPointerException
    at com.google.code.play2.plugin.AbstractPlay2ServerMojo.getProjectClassPath(AbstractPlay2ServerMojo.java:151)
    at com.google.code.play2.plugin.AbstractPlay2ServerMojo.prepareAntJavaTask(AbstractPlay2ServerMojo.java:70)
    at com.google.code.play2.plugin.AbstractPlay2RunMojo.internalExecute(AbstractPlay2RunMojo.java:91)
    at com.google.code.play2.plugin.AbstractPlay2Mojo.execute(AbstractPlay2Mojo.java:139)
    at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
    at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
    at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
    at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
    at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2 seconds
[INFO] Finished at: Wed Sep 24 12:41:25 MSK 2014
[INFO] Final Memory: 14M/299M
[INFO] ------------------------------------------------------------------------

Process finished with exit code 1
    at com.google.code.play2.plugin.AbstractPlay2ServerMojo.prepareAntJavaTask(AbstractPlay2ServerMojo.java:70)
    at com.google.code.play2.plugin.AbstractPlay2RunMojo.internalExecute(AbstractPlay2RunMojo.java:91)
    at com.google.code.play2.plugin.AbstractPlay2Mojo.execute(AbstractPlay2Mojo.java:139)
    at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
    at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
    at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
    at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
    at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

然后我尝试sbt-compiler =＆gt; sbt-compiler：编译，这给了我另一个错误：

[INFO] Building Afrodita
[INFO]    task-segment: [com.google.code.sbt-compiler-maven-plugin:sbt-compiler-maven-plugin:1.0.0-beta4:compile]
[INFO] ------------------------------------------------------------------------
[INFO] [sbt-compiler:compile {execution: default-cli}]
[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] An invalid artifact was detected.

This artifact might be in your project's POM, or it might have been included transitively during the resolution process. Here is the information we do have for this artifact:

    o GroupID:     <<< MISSING >>>
    o ArtifactID:  sbt-compiler-sbt0135
    o Version:     <<< MISSING >>>
    o Type:        jar

[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.artifact.InvalidArtifactRTException: For artifact {null:sbt-compiler-sbt0135:null:jar}: The groupId cannot be empty.
    at org.apache.maven.artifact.DefaultArtifact.validateIdentity(DefaultArtifact.java:129)
    at org.apache.maven.artifact.DefaultArtifact.<init>(DefaultArtifact.java:122)
    at org.apache.maven.artifact.factory.DefaultArtifactFactory.createArtifact(DefaultArtifactFactory.java:158)
    at org.apache.maven.artifact.factory.DefaultArtifactFactory.createArtifact(DefaultArtifactFactory.java:117)
    at org.apache.maven.artifact.factory.DefaultArtifactFactory.createArtifact(DefaultArtifactFactory.java:111)
    at org.apache.maven.artifact.factory.DefaultArtifactFactory.createArtifact(DefaultArtifactFactory.java:40)
    at com.google.code.sbt.compiler.plugin.AbstractSBTCompileMojo.getResolvedArtifact(AbstractSBTCompileMojo.java:547)
    at com.google.code.sbt.compiler.plugin.AbstractSBTCompileMojo.getWellKnownSbtCompiler(AbstractSBTCompileMojo.java:685)
    at com.google.code.sbt.compiler.plugin.AbstractSBTCompileMojo.getSbtCompiler(AbstractSBTCompileMojo.java:635)
    at com.google.code.sbt.compiler.plugin.AbstractSBTCompileMojo.internalExecute(AbstractSBTCompileMojo.java:287)
    at com.google.code.sbt.compiler.plugin.SBTCompileMojo.internalExecute(SBTCompileMojo.java:102)
    at com.google.code.sbt.compiler.plugin.AbstractSBTCompileMojo.execute(AbstractSBTCompileMojo.java:247)
    at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
    at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
    at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
    at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
    at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

如果我尝试使用激活器运行项目，那就运行正常。我有什么办法解决这个问题并用maven运行项目，没有SBT？

Answer 1

play2:run目标的executedProject参数是可选的。没有使用过play2，我的第一个猜测就是它不是目标所假定的。如果运行mvn ... -e -X（打印错误和调试信息），您是否看到实际设置的值？

Answer 2

第一个问题（使用play2） - 在1.0.0-alpha9中，错误消息得到了改进，现在它告诉我在这种情况下要做什么。它是问题https://code.google.com/p/play2-maven-plugin/issues/detail?id=29的一部分，请参阅最后评论。

第二个问题（使用sbt-compiler）在1.0.0-beta5中得到修复 - 请参阅问题https://code.google.com/p/sbt-compiler-maven-plugin/issues/detail?id=14。

将play框架与maven集成

2 个答案: