实例代码: import org.apache.spark.SparkConf; import org.apache.spark.api.java.JavaPairRDD; import org.apache.spark.api.java.JavaRDD; import org.apache.spark.api.java.JavaSparkContext; import org.apache.spark.api.java.function.FlatMapFunction; import org.…

一.java版本 package cn.spark.study.streaming; import java.util.Arrays; import org.apache.spark.SparkConf; import org.apache.spark.api.java.function.FlatMapFunction; import org.apache.spark.api.java.function.Function2; import org.apache.spark.api.java.fu…

1.编写程序代码如下: Wordcount.scala package Wordcount import org.apache.spark.SparkConf import org.apache.spark.SparkContext import org.apache.spark.SparkContext._ /** * @author hadoop * 统计字符出现个数 * */ object Wordcount { def main(args: Array[String]) { if(arg…

import org.apache.spark.SparkConf; import org.apache.spark.api.java.JavaPairRDD; import org.apache.spark.api.java.JavaRDD; import org.apache.spark.api.java.JavaSparkContext; import org.apache.spark.api.java.function.FlatMapFunction; import org.apache…

wordcount程序 文件wordcount.txt hello wujiadong hello spark hello hadoop hello python 程序示例 package wujiadong_sparkCore import org.apache.spark.{SparkConf, SparkContext} /** * Created by Administrator on 2017/2/25. */ object LocalSpark { def main(args: Ar…

WordCount程序 求下列文件中使用空格分割之后,单词出现的个数 input.txt java scala python hello world java pyfysf upuptop wintp top sfok sf sf sf java android sf pyfysf upuptop pyfysf upuptop java android spark hello world world hello top scala spark spark spark sql 创建maven项目…

Spark学习笔记1--第一个Spark程序:单词数统计 笔记摘抄自 [美] Holden Karau 等著的<Spark快速大数据分析> 添加依赖 通过 Maven 添加 Spark-core_2.10 的依赖 程序 找了一篇注释比较清楚的博客代码1,一次运行通过 import scala.Tuple2; import org.apache.spark.SparkConf; import org.apache.spark.api.java.JavaPairRDD; import org.ap…

问题导读: 1.什么是sbt? 2.sbt项目环境如何建立? 3.如何使用sbt编译打包scala? [sbt介绍 sbt是一个代码编译工具,是scala界的mvn,可以编译scala,java等,需要java1.6以上. sbt项目环境建立 sbt编译需要固定的目录格式,并且需要联网,sbt会将依赖的jar包下载到用户home的.ivy2下面,目录结构如下: |--build.sbt |--lib |--project |--src |   |--main |   |    |--scala…

IDE:eclipse Spark:spark-1.1.0-bin-hadoop2.4 scala:2.10.4 创建scala工程,编写wordcount程序如下 package com.luogankun.spark.base import org.apache.spark.SparkConf import org.apache.spark.SparkContext import org.apache.spark.SparkContext._ /** * 统计字符出现次数 */ object…

1.启动 启动HDFS 启动spark的local模式./spark-shell 2.知识点 textFile: def textFile( path: String, minPartitions: Int = defaultMinPartitions): RDD[String] Filter: Return a new RDD containing only the elements that satisfy a predicate. def filter(f: T => Boolean):…