我已经从scala-arcetype-simple和intelij IDE创建了maven项目。 pom是：
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.myxxx.scala</groupId>
<artifactId>scala-0</artifactId>
<version>1.0-SNAPSHOT</version>
<inceptionYear>2008</inceptionYear>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<encoding>UTF-8</encoding>
<scala.version>2.13.1</scala.version>
<scala.compat.version>2.13</scala.compat.version>
</properties>
<repositories>
<repository>
<id>scala-tools.org</id>
<name>Scala-Tools Maven2 Repository</name>
<url>http://scala-tools.org/repo-releases</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>scala-tools.org</id>
<name>Scala-Tools Maven2 Repository</name>
<url>http://scala-tools.org/repo-releases</url>
</pluginRepository>
</pluginRepositories>
<dependencies>
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-library</artifactId>
<version>${scala.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.4</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.specs</groupId>
<artifactId>specs</artifactId>
<version>1.2.5</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<sourceDirectory>src/main/scala</sourceDirectory>
<testSourceDirectory>src/test/scala</testSourceDirectory>
<plugins>
<plugin>
<groupId>org.scala-tools</groupId>
<artifactId>maven-scala-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
<configuration>
<scalaVersion>${scala.version}</scalaVersion>
<args>
<arg>-target:jvm-1.5</arg>
</args>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-eclipse-plugin</artifactId>
<configuration>
<downloadSources>true</downloadSources>
<buildcommands>
<buildcommand>ch.epfl.lamp.sdt.core.scalabuilder</buildcommand>
</buildcommands>
<additionalProjectnatures>
<projectnature>ch.epfl.lamp.sdt.core.scalanature</projectnature>
</additionalProjectnatures>
<classpathContainers>
<classpathContainer>org.eclipse.jdt.launching.JRE_CONTAINER</classpathContainer>
<classpathContainer>ch.epfl.lamp.sdt.launching.SCALA_CONTAINER</classpathContainer>
</classpathContainers>
</configuration>
</plugin>
</plugins>
</build>
<reporting>
<plugins>
<plugin>
<groupId>org.scala-tools</groupId>
<artifactId>maven-scala-plugin</artifactId>
<configuration>
<scalaVersion>${scala.version}</scalaVersion>
</configuration>
</plugin>
</plugins>
</reporting>
</project>
我得到的错误是：
Error:scalac: Error: assertion failed:
No Scala(Long)Signature annotation in classfile with ScalaSignature attribute: class JUnit4
while compiling: D:\programming\workspace-intelij\src\test\scala\com\myxxx\scala\MySpec.scala
during phase: globalPhase=typer, enteringPhase=namer
library version: version 2.13.1
compiler version: version 2.13.1
reconstructed args: -classpath D:\programming\workspace-intelij\target\test-classes;D:\programming\workspace-intelij\target\classes;C:\Users\wolnosc\.m2\repository\org\scala-lang\scala-library\2.13.1\scala-library-2.13.1.jar;C:\Users\wolnosc\.m2\repository\junit\junit\4.4\junit-4.4.jar;C:\Users\wolnosc\.m2\repository\org\specs\specs\1.2.5\specs-1.2.5.jar;C:\Users\wolnosc\.m2\repository\org\scalatest\scalatest\0.9.1\scalatest-0.9.1.jar;C:\Users\wolnosc\.m2\repository\org\scalacheck\scalacheck\1.2\scalacheck-1.2.jar;C:\Users\wolnosc\.m2\repository\org\jmock\jmock\2.4.0\jmock-2.4.0.jar;C:\Users\wolnosc\.m2\repository\org\hamcrest\hamcrest-core\1.1\hamcrest-core-1.1.jar;C:\Users\wolnosc\.m2\repository\org\hamcrest\hamcrest-library\1.1\hamcrest-library-1.1.jar
last tree to typer: Ident(JUnit4)
tree position: line 6 of D:\programming\workspace-intelij\src\test\scala\com\myxxx\scala\MySpec.scala
symbol: <none>
symbol definition: <none> (a NoSymbol)
symbol package: <none>
symbol owners:
call site: class MySpecTest in package scala in package scala
== Source file context for tree position ==
3 import org.specs._
4 import org.specs.runner.{ConsoleRunner, JUnit4}
5
6 class MySpecTest extends JUnit4(MySpec)
7 //class MySpecSuite extends ScalaTestSuite(MySpec)
8 object MySpecRunner extends ConsoleRunner(MySpec)
9
java.lang.AssertionError: assertion failed:
No Scala(Long)Signature annotation in classfile with ScalaSignature attribute: class JUnit4
while compiling: D:\programming\workspace-intelij\src\test\scala\com\myxxx\scala\MySpec.scala
during phase: globalPhase=typer, enteringPhase=namer
library version: version 2.13.1
compiler version: version 2.13.1
reconstructed args: -classpath D:\programming\workspace-intelij\target\test-classes;D:\programming\workspace-intelij\target\classes;C:\Users\wolnosc\.m2\repository\org\scala-lang\scala-library\2.13.1\scala-library-2.13.1.jar;C:\Users\wolnosc\.m2\repository\junit\junit\4.4\junit-4.4.jar;C:\Users\wolnosc\.m2\repository\org\specs\specs\1.2.5\specs-1.2.5.jar;C:\Users\wolnosc\.m2\repository\org\scalatest\scalatest\0.9.1\scalatest-0.9.1.jar;C:\Users\wolnosc\.m2\repository\org\scalacheck\scalacheck\1.2\scalacheck-1.2.jar;C:\Users\wolnosc\.m2\repository\org\jmock\jmock\2.4.0\jmock-2.4.0.jar;C:\Users\wolnosc\.m2\repository\org\hamcrest\hamcrest-core\1.1\hamcrest-core-1.1.jar;C:\Users\wolnosc\.m2\repository\org\hamcrest\hamcrest-library\1.1\hamcrest-library-1.1.jar
last tree to typer: Ident(JUnit4)
tree position: line 6 of D:\programming\workspace-intelij\src\test\scala\com\myxxx\scala\MySpec.scala
symbol: <none>
symbol definition: <none> (a NoSymbol)
symbol package: <none>
symbol owners:
call site: class MySpecTest in package scala in package scala
== Source file context for tree position ==
3 import org.specs._
4 import org.specs.runner.{ConsoleRunner, JUnit4}
5
6 class MySpecTest extends JUnit4(MySpec)
7 //class MySpecSuite extends ScalaTestSuite(MySpec)
8 object MySpecRunner extends ConsoleRunner(MySpec)
如何运行简单的Hello World？