spark+IntellijIDE 项目搭建

本文介绍了如何在Intellij IDEA中使用Maven搭建一个Scala项目,并集成Spark。从创建项目到配置Scala SDK,再到添加Spark依赖,解决版本冲突问题,最终实现运行一个简单的Spark任务。

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1、new project ,选择maven ,JDK1.8,模板选择camel-archetype-scala

2、Next,

GroupId:com.xx.aa

ArtiFactId:sparkPrj

Version:1.0-SNAPSHOT

3、选择对应的maven

4、输入对应的项目名称,finish即可。

完成的项目结构如下图:

5、需要给项目加上scala依赖才能新增scala class

File -》project structure-》Modules ,选中新建的那个项目,在dependencies页签,点击右侧+号,library ,加入你的scala-sdk

6、新建一个HelloWorld.scala,运行成功!!!

至此一个scala项目已经建好。

项目的pom。xml如下:

<?xml version="1.0" encoding="UTF-8"?>
<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.xx.aa</groupId>
  <artifactId>scalaprj</artifactId>
  <packaging>jar</packaging>
  <version>1.0-SNAPSHOT</version>

  <name>A Camel Scala Route</name>

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

  <dependencyManagement>
    <dependencies>
      <!-- Camel BOM -->
      <dependency>
        <groupId>org.apache.camel</groupId>
        <artifactId>camel-parent</artifactId>
        <version>2.22.0</version>
        <scope>import</scope>
        <type>pom</type>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <dependencies>

    <dependency>
      <groupId>org.apache.camel</groupId>
      <artifactId>camel-core</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.camel</groupId>
      <artifactId>camel-scala</artifactId>
    </dependency>

    <!-- scala -->
    <dependency>
      <groupId>org.scala-lang</groupId>
      <artifactId>scala-library</artifactId>
      <version>2.11.7</version>
    </dependency>
    <dependency>
      <groupId>org.scala-lang.modules</groupId>
      <artifactId>scala-xml_2.11</artifactId>
      <version>1.0.6</version>
    </dependency>

    <!-- logging -->
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-api</artifactId>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-core</artifactId>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-slf4j-impl</artifactId>
      <scope>runtime</scope>
    </dependency>

    <!-- testing -->
    <dependency>
      <groupId>org.apache.camel</groupId>
      <artifactId>camel-test</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>

  <build>
    <defaultGoal>install</defaultGoal>
    <sourceDirectory>src/main/scala</sourceDirectory>
    <testSourceDirectory>src/test/scala</testSourceDirectory>

    <plugins>

      <!-- the Maven compiler plugin will compile Java source files -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.7.0</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-resources-plugin</artifactId>
        <version>3.0.2</version>
        <configuration>
          <encoding>UTF-8</encoding>
        </configuration>
      </plugin>

      <!-- the Maven Scala plugin will compile Scala source files -->
      <plugin>
        <groupId>net.alchim31.maven</groupId>
        <artifactId>scala-maven-plugin</artifactId>
        <version>3.2.2</version>
        <executions>
          <execution>
            <goals>
              <goal>compile</goal>
              <goal>testCompile</goal>
            </goals>
          </execution>
        </executions>
      </plugin>

      <!-- configure the eclipse plugin to generate eclipse project descriptors for a Scala project -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-eclipse-plugin</artifactId>
        <version>2.10</version>
        <configuration>
          <projectnatures>
            <projectnature>org.scala-ide.sdt.core.scalanature</projectnature>
            <projectnature>org.eclipse.jdt.core.javanature</projectnature>
          </projectnatures>
          <buildcommands>
            <buildcommand>org.scala-ide.sdt.core.scalabuilder</buildcommand>
          </buildcommands>
          <classpathContainers>
            <classpathContainer>org.scala-ide.sdt.launching.SCALA_CONTAINER</classpathContainer>
            <classpathContainer>org.eclipse.jdt.launching.JRE_CONTAINER</classpathContainer>
          </classpathContainers>
          <excludes>
            <exclude>org.scala-lang:scala-library</exclude>
            <exclude>org.scala-lang:scala-compiler</exclude>
          </excludes>
          <sourceIncludes>
            <sourceInclude>**/*.scala</sourceInclude>
            <sourceInclude>**/*.java</sourceInclude>
          </sourceIncludes>
        </configuration>
      </plugin>

      <!-- allows the route to be run via 'mvn exec:java' -->
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>exec-maven-plugin</artifactId>
        <version>1.6.0</version>
        <configuration>
          <mainClass>com.xx.aa.MyRouteMain</mainClass>
        </configuration>
      </plugin>
    </plugins>
  </build>

</project>

下面我们要整合spark。。。

1、加入spark依赖

<dependency>
  <groupId>org.apache.spark</groupId>
  <artifactId>spark-core_${scala.version}</artifactId>
  <version>${spark.version}</version>
</dependency>

2、新增一个spark任务SparkJob

package com.xx.aa

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

/**
  * @Auther: 
  * @Date: 2018/7/16 19:26
  * @Description:
  */
object SarkJob {

  def main(args: Array[String]): Unit = {
    val conf = new SparkConf().setMaster("local").setAppName("wordcount");
    val sc = new SparkContext(conf)
    val input = sc.textFile("E:\\test.txt")
    val words = input.flatMap(line=>line.split(" "))
    println("words:"+words)
    val counts = words.map(word => (word,1)).reduceByKey{case(x , y) => x + y}
    //    counts.saveAsTextFile("E:\\result.txt")

    counts.foreach(print);
  }
}

3、编译报错:

报错原因:scala版本不正确:改成本地的scala版本,编译成功。

4、运行job,报错:

5、需要覆盖json4s版本,使用2.8.7

修改后的pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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.xx.aa</groupId>
  <artifactId>scalaprj</artifactId>
  <packaging>jar</packaging>
  <version>1.0-SNAPSHOT</version>

  <name>A Camel Scala Route</name>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <spark.version>2.1.0</spark.version>
    <scala.version>2.11</scala.version>
    <json4s.version>3.2.11</json4s.version>
    <jackson.version>2.8.7</jackson.version>
  </properties>

  <dependencyManagement>
    <dependencies>
      <!-- Camel BOM -->
      <dependency>
        <groupId>org.apache.camel</groupId>
        <artifactId>camel-parent</artifactId>
        <version>2.22.0</version>
        <scope>import</scope>
        <type>pom</type>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <dependencies>

    <dependency>
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-core_${scala.version}</artifactId>
      <version>${spark.version}</version>
    </dependency>

    <!-- 覆盖json4s版本-->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>${jackson.version}</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.module</groupId>
      <artifactId>jackson-module-scala_2.11</artifactId>
      <version>${jackson.version}</version>
    </dependency>

    <dependency>
      <groupId>org.apache.camel</groupId>
      <artifactId>camel-core</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.camel</groupId>
      <artifactId>camel-scala</artifactId>
    </dependency>

    <!-- scala -->
    <!--<dependency>-->
      <!--<groupId>org.scala-lang</groupId>-->
      <!--<artifactId>scala-library</artifactId>-->
      <!--<version>2.11.7</version>-->
    <!--</dependency>-->
    <dependency>
      <groupId>org.scala-lang</groupId>
      <artifactId>scala-compiler</artifactId>
      <version>2.11.8</version>
    </dependency>
    <dependency>
      <groupId>org.scala-lang.modules</groupId>
      <artifactId>scala-xml_2.11</artifactId>
      <version>1.0.6</version>
    </dependency>

    <!-- logging -->
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-api</artifactId>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-core</artifactId>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-slf4j-impl</artifactId>
      <scope>runtime</scope>
    </dependency>

    <!-- testing -->
    <dependency>
      <groupId>org.apache.camel</groupId>
      <artifactId>camel-test</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>

  <build>
    <defaultGoal>install</defaultGoal>
    <sourceDirectory>src/main/scala</sourceDirectory>
    <testSourceDirectory>src/test/scala</testSourceDirectory>

    <plugins>

      <!-- the Maven compiler plugin will compile Java source files -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.7.0</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-resources-plugin</artifactId>
        <version>3.0.2</version>
        <configuration>
          <encoding>UTF-8</encoding>
        </configuration>
      </plugin>

      <!-- the Maven Scala plugin will compile Scala source files -->
      <plugin>
        <groupId>net.alchim31.maven</groupId>
        <artifactId>scala-maven-plugin</artifactId>
        <version>3.2.2</version>
        <executions>
          <execution>
            <goals>
              <goal>compile</goal>
              <goal>testCompile</goal>
            </goals>
          </execution>
        </executions>
      </plugin>

      <!-- configure the eclipse plugin to generate eclipse project descriptors for a Scala project -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-eclipse-plugin</artifactId>
        <version>2.10</version>
        <configuration>
          <projectnatures>
            <projectnature>org.scala-ide.sdt.core.scalanature</projectnature>
            <projectnature>org.eclipse.jdt.core.javanature</projectnature>
          </projectnatures>
          <buildcommands>
            <buildcommand>org.scala-ide.sdt.core.scalabuilder</buildcommand>
          </buildcommands>
          <classpathContainers>
            <classpathContainer>org.scala-ide.sdt.launching.SCALA_CONTAINER</classpathContainer>
            <classpathContainer>org.eclipse.jdt.launching.JRE_CONTAINER</classpathContainer>
          </classpathContainers>
          <excludes>
            <exclude>org.scala-lang:scala-library</exclude>
            <exclude>org.scala-lang:scala-compiler</exclude>
          </excludes>
          <sourceIncludes>
            <sourceInclude>**/*.scala</sourceInclude>
            <sourceInclude>**/*.java</sourceInclude>
          </sourceIncludes>
        </configuration>
      </plugin>

      <!-- allows the route to be run via 'mvn exec:java' -->
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>exec-maven-plugin</artifactId>
        <version>1.6.0</version>
        <configuration>
          <mainClass>com.xx.aa.MyRouteMain</mainClass>
        </configuration>
      </plugin>
    </plugins>
  </build>

</project>

6、运行结果如下:

(are,1)(you,1)(how,1)(hello,1)

 

test.txt文件内容如下:

hello how are you

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