0、需求
加载外部文件进行图计算,数据存在于该外部文件当中。
1、加载依赖包
<?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>cn.along.com</groupId>
<artifactId>along-root</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<spark.version>2.0.2</spark.version>
<hbase.version>1.3.1</hbase.version>
<hadoop.version>2.7.5</hadoop.version>
<scala.version>2.11.8</scala.version>
</properties>
<dependencies>
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-library</artifactId>
<version>${spark.version}</version>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-core_2.11</artifactId>
<version>${spark.version}</version>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-sql_2.11</artifactId>
<version>${spark.version}</version>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-mllib_2.11</artifactId>
<version>${spark.version}</version>
</dependency>
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-library</artifactId>
<version>${scala.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-compiler</artifactId>
<version>${scala.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-reflect</artifactId>
<version>${scala.version}</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<sourceDirectory>src/main/scala</sourceDirectory>
<testSourceDirectory>src/test/scala</testSourceDirectory>
<finalName>networdcount</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>cn.itcast.streaming.WorldCount</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
</plugins>
</build>
</project>
2、准备数据
2.1、文件follers.txt,内容如下所示:
2 1
4 1
1 2
6 3
7 3
7 6
6 7
3 7
2.2、文件users.txt,内容如下所示:
1,BarackObama,Barack Obama
2,ladygaga,Goddes of Love
3,jereslg,John Resig
4,justinbleber,Justin Bieber
6,matel_Zahair,Matel Zaharia
7,ordersky,Matrin,Odersky
8,anonsys
3、实现代码
def main(args: Array[String]): Unit = {
//准备环境
val conf: SparkConf = new SparkConf().setAppName("test2").setMaster("local[4]")
val sc = new SparkContext(conf)
sc.setLogLevel("WARN")
//读取数据
val path = "follers.txt"
val graph: Graph[Int, Int] = GraphLoader.edgeListFile(sc, path).partitionBy(PartitionStrategy.RandomVertexCut)
//打印图的数据
graph.edges.foreach(println(_))
graph.vertices.foreach(println(_))
//构建图的三角关系的网络
val tricount = graph.triangleCount().vertices
val userRDD: RDD[String] = sc.textFile("users.txt")
userRDD.foreach(println(_))
val users = userRDD.map {
lines =>
val fileds = lines.split(",")
(fileds(0).toInt, fileds(1))
}
users.foreach(println(_))
}
4、其实核心代码就两个:
1、如何加载图关系文件
2、如何和现有的数据集进行生成关系
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