在idea中新建工程
![image.png](https://upload-images.jianshu.io/upload_images/18296616-ca136c6438b5ad0f.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
![image.png](https://upload-images.jianshu.io/upload_images/18296616-c60b07012653164f.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
删除新项目的src,创建moudle
![image.png](https://upload-images.jianshu.io/upload_images/18296616-cd006c09d0c9d4e7.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
在父pom中添加spark和scala依赖,我们项目中用scala开发模型,建议scala,开发体验会更好(java、python也可以)
<?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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.shaozhiqi.bigdata</groupId> <artifactId>spark-demo01</artifactId> <packaging>pom</packaging> <version>1.0-SNAPSHOT</version> <modules> <module>spark-core</module> </modules> <properties> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> <scala.version>2.11.7</scala.version> <spark.version>2.4.3</spark.version> <encoding>UTF-8</encoding> </properties> <dependencies> <dependency> <groupId>org.scala-lang</groupId> <artifactId>scala-library</artifactId> <version>${scala.version}</version> </dependency> <dependency> <groupId>org.apache.spark</groupId> <artifactId>spark-core_2.11</artifactId> <version>${spark.version}</version> </dependency> </dependencies> </project>
在我们Moudle中配置打包插件
<?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/xsd/maven-4.0.0.xsd"> <parent> <artifactId>spark-demo01</artifactId> <groupId>com.shaozhiqi.bigdata</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>spark-core</artifactId> <build> <pluginManagement> <plugins> <!-- 编译scala的插件 --> <plugin> <groupId>net.alchim31.maven</groupId> <artifactId>scala-maven-plugin</artifactId> <version>3.2.2</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> <!-- 打包插件 --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-shade-plugin</artifactId> <version>3.2.1</version> <configuration> <transformers> <!-- add Main-Class to manifest file --> <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer"> <!--you can add you want to need the main class--><!----> <mainClass>com.shaozhiqi.bigdata.spark.WordCount</mainClass> </transformer> </transformers> <createDependencyReducedPom>false</createDependencyReducedPom> </configuration> <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> </project>
安装scala开发插件到idea
![image.png](https://upload-images.jianshu.io/upload_images/18296616-509dfca7fdf916d4.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
安装后重启
设置scalasdk,选我们新建的moudle
![image.png](https://upload-images.jianshu.io/upload_images/18296616-40e524c6b46c62b8.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
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新建scala对象
![image.png](https://upload-images.jianshu.io/upload_images/18296616-f5dbb1c358d10044.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
编写代码:
def main(args: Array[String]): Unit = { //1.创建配置信息 val conf =new SparkConf().setAppName("wordcount").setMaster("local[*]") //2.创建sparkcontext val sc= new SparkContext(conf) //3.处理业务数据,我们统计每个单词的个数 // 我们要在集群上尝试所以就将textFile的参数参数化,如果在本地执行则写本地的绝对路径 val lines=sc.textFile("G:\temp\input.txt") val words=lines.flatMap(_.split(" ")) val keyMap=words.map((_, 1)) val result =keyMap.reduceByKey(_+_) result.foreach(println) //4.关闭连接 sc.stop() }
本地调测试
(1233,1) (llll,1) (hhh,1) (ddd,2) (55,2) (,1) (kkkk,1) (jjj,1)