运行Scala-Maven项目时的java.lang.NoClassDefFoundError

Question

第一次尝试运行新项目。 mvn install顺利进行，但当我尝试运行它时，我得到：

Exception in thread "main" java.lang.NoClassDefFoundError: scala/Tuple2

现在，如果它甚至找不到Scala的基础知识，那就非常错误了。说实话，它不会识别代码本身之外的任何东西。 我正在附上我的POM文件，希望有人可以提供帮助..

<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>com.foo</groupId>
  <artifactId>bar</artifactId>
  <version>1.0.0</version>
  <packaging>jar</packaging>

  <name>Foo Bar</name>

  <properties>
    <app.main.class>com.foo.main</app.main.class>
    <spark.version>1.6.1</spark.version>
    <scala.version>2.10.4</scala.version>
    <scala.binary.version>2.10</scala.binary.version>
  </properties>

  <pluginRepositories>
    <pluginRepository>
      <id>scala-tools.org</id>
      <name>Scala-tools Maven2 Repository</name>
      <url>http://scala-tools.org/repo-releases</url>
    </pluginRepository>
  </pluginRepositories>

  <repositories>
    <repository>
      <id>maven-repo</id>
      <name>Maven Repository</name>
      <url>http://repo1.maven.apache.org/maven2</url>
      <releases>
        <enabled>true</enabled>
      </releases>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
    </repository>
    <repository>
      <id>apache-repo</id>
      <name>Apache release repo</name>
      <url>https://github.com/adatao/mvnrepos/tree/master/releases/</url>
    </repository>
  </repositories>

  <dependencies>
    <dependency>
      <groupId>org.scala-lang</groupId>
      <artifactId>scala-library</artifactId>
      <version>${scala.version}</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-sql_${scala.binary.version}</artifactId>
      <version>${spark.version}</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-hive_${scala.binary.version}</artifactId>
      <version>${spark.version}</version>
      <scope>provided</scope>
    </dependency>
  </dependencies>

  <build>
    <extensions>
      <extension>
        <groupId>org.springframework.build</groupId>
        <artifactId>aws-maven</artifactId>
        <version>5.0.0.RELEASE</version>
      </extension>
    </extensions>
    <sourceDirectory>src/main/scala</sourceDirectory>
    <testSourceDirectory>src/test/scala</testSourceDirectory>
    <plugins>

      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-jar-plugin</artifactId>
        <version>2.4</version>
        <configuration>
          <archive>
            <manifest>
              <addClasspath>true</addClasspath>
              <classpathPrefix>lib/</classpathPrefix>
              <mainClass>com.foo.main</mainClass>
            </manifest>
          </archive>
        </configuration>
      </plugin>

      <plugin>
        <groupId>net.alchim31.maven</groupId>
        <artifactId>scala-maven-plugin</artifactId>
        <version>3.2.0</version>
        <executions>
          <execution>
            <goals>
              <goal>compile</goal>
              <goal>testCompile</goal>
            </goals>
          </execution>
        </executions>
        <configuration>
          <jvmArgs>
            <jvmArg>-Xms256m</jvmArg>
            <jvmArg>-Xmx2048m</jvmArg>
          </jvmArgs>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>