1.使用IDEA建立Maven專案

2.匯入pom.xml檔案

<properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <scala.version>2.11.8</scala.version>
        <spark.version>2.1.0</spark.version>
        <hadoop.version>2.6.0</hadoop.version>
        <encoding>UTF-8</encoding>
    </properties>

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

        <!-- 匯入spark的依賴 -->
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-core_2.11</artifactId>
            <version>${spark.version}</version>
        </dependency>

        <!-- 指定hadoop-client API的版本 -->
        <dependency>
            <groupId>org.apache.hadoop</groupId>
            <artifactId>hadoop-client</artifactId>
            <version>${hadoop.version}</version>
        </dependency>

    </dependencies>

    <build>
        <pluginManagement>
            <plugins>
                <!-- 編譯scala的外掛 -->
                <plugin>
                    <groupId>net.alchim31.maven</groupId>
                    <artifactId>scala-maven-plugin</artifactId>
                    <version>3.2.2</version>
                </plugin>
                <!-- 編譯java的外掛 -->
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.5.1</version>
                </plugin>
            </plugins>
        </pluginManagement>
        <plugins>
            <plugin>
                <groupId>net.alchim31.maven</groupId>
                <artifactId>scala-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <id>scala-compile-first</id>
                        <phase>process-resources</phase>
                        <goals>
                            <goal>add-source</goal>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>scala-test-compile</id>
                        <phase>process-test-resources</phase>
                        <goals>
                            <goal>testCompile</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <executions>
                    <execution>
                        <phase>compile</phase>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>


            <!-- 打jar外掛 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>2.4.3</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <filters>
                                <filter>
                                    <artifact>*:*</artifact>
                                    <excludes>
                                        <exclude>META-INF/*.SF</exclude>
                                        <exclude>META-INF/*.DSA</exclude>
                                        <exclude>META-INF/*.RSA</exclude>
                                    </excludes>
                                </filter>
                            </filters>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
 

注意：    這裡的Scala  Spark  Hadoop版本必須按照叢集上的修改，特別是Scala和Spark的，要和你叢集上的版本號一致，可以在Spark叢集中使用Spark Shell模式檢視版本號

3.編寫WordCount程式

package cn.ysjh0014

import org.apache.spark.rdd.RDD
import org.apache.spark.{SparkConf, SparkContext}

object ScalaWordCount {

  def main(args: Array[String]): Unit = {
    //建立Spark配置，應用程式的名字
    val conf = new SparkConf().setAppName("ScalaWordCount")
    //建立Spark程式執行的入口
    val sc = new SparkContext(conf)
    //指定以後從哪讀取資料建立RDD(彈性分散式資料集)
    val line = sc.textFile(args(0))
    //切分壓平
    val word = line.flatMap(_.split(" "))
    //將單詞和1組成元組
    val WordOne = word.map((_, 1))
    //按照key進行聚合
    val reduce = WordOne.reduceByKey(_ + _)
    //排序
    val sort = reduce.sortBy(_._2, false)
    //將結果儲存到hdfs
    sort.saveAsTextFile(args(1))
    //釋放資源
    sc.stop()

  }
}
 

4.使用Maven打成jar包

在IDEA中view---->Tool Windows--->Maven Projects--->Package，jar包在target下，有兩個jar包，original-Spark-1.0-SNAPSHOT.jar是隻將程式碼打成了jar包，Spark-1.0-SNAPSHOT.jar是將所有依賴也打成了jar包

5.提交到Spark叢集上測試

bin/spark-submit \
--master spark://cdh0:7077 \
--class cn.ysjh0014.ScalaWordCount \            包名+專案名
/opt/package/original-Spark-1.0-SNAPSHOT.jar \  jar包所在目錄
hdfs://cdh0:8020/usr/ys/input/test.txt \        讀取資料的hdfs路徑
hdfs://cdh0:8020/usr/output                     儲存資料到hdfs的路徑
 

6.檢視執行結果

至此執行成功