IDEA设置默认的maven环境、加入scala环境、spark-scala项目pom设置、打包、提交命令
当前项目选settings...,以后所有其他项目选settings for new projects...
搜索到maven选项卡,设置三处:maven home、settings.xml、local repository
新建maven项目,加入scala环境,file-project structure-copy to project libraries
新建scala文件夹,右键文件夹make dir as--sources root,在其中new一个scala class,注意类型为object,名称需包含包名(com.baidu.sh.xzq.wordcount)
pom设置
<?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.baidu.sh.xzq</groupId>
<artifactId>spark</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-core_2.11</artifactId>
<version>2.3.2</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.scala-tools</groupId>
<artifactId>maven-scala-plugin</artifactId>
<version>2.15.1</version>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
示例代码
package com.baidu.sh.xzq
import org.apache.spark.{SparkConf, SparkContext}
object wordcount {
def main(args: Array[String]): Unit = {
val conf=new SparkConf()
conf.setAppName("spark-scala")
val sc=new SparkContext(conf)
val rdd=sc.textFile("/hadoop/profile")
rdd.flatMap(_.split(""))
.map((_,1))
.reduceByKey(_+_)
.sortBy(_._2)
.saveAsTextFile("/hadoop/prof")
sc.stop()
}
}
打包,右侧栏选择clean,再执行package
之后可在target文件加下发现打包好的jar包,clean后又可删除这些文件夹
提交命令(class名可在类名上copy reference得到)
spark-submit --class com.baidu.sh.xzq.workcount /share/spark-1.0-SNAPSHOT.jar