import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.Function2; import java.util.Arrays;import java.util.List; /** * reduce(fun) 算子: * 每…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.VoidFunction;import java.util.Arrays;import java.util.List; /** * union 算子: * 取两个RD…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext; import java.util.Arrays;import java.util.List; /** * sampleTake 算子: * 先 sample 再 take * 第一个参数:是否可以重复 * 第二个参数:返回take(n) * 第三个…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.Function; import java.util.Arrays;import java.util.List; /** * saveastextfile 算子: *…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.Function2;import org.apache.spark.api.java.function.VoidFunction; import java.util.…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.Function2;import org.apache.spark.api.java.function.VoidFunction; import java.util.…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.Function;import org.apache.spark.api.java.function.VoidFunction; import java.util.A…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.VoidFunction; import java.util.Arrays;import java.util.List; /** * intersection 算子:…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext; import java.util.Arrays;import java.util.List; /** * frist 算子: * * 取RDD的第一个元素 * */public class FristOperator { public static…

import org.apache.spark.SparkConf;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.spark.api.java.function.VoidFunction;import java.…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.Function;import org.apache.spark.api.java.function.VoidFunction; import java.util.A…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.VoidFunction; import java.util.Arrays;import java.util.List; /** * distinct 算子: * 简…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext; import java.util.Arrays;import java.util.List; /** * count 算子: * 统计一下RDD中有多少数据量 */public class CountOperator { public static…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaPairRDD;import org.apache.spark.api.java.JavaSparkContext;import scala.Tuple2;import java.util.Arrays;import java.util.List;import java.util.Map; /** * countbykey 算子: * 只能用在(K,V)结…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.Function; import java.util.Arrays;import java.util.List; /** * collect 算子: * 将集群中其他…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.Function2;import org.apache.spark.api.java.function.VoidFunction; import java.util.…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.VoidFunction;import scala.Tuple2;import java.util.Arrays;import java.util.List; /**…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaPairRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.Function2;import org.apache.spark.api.java.function.VoidFunction;import scala.T…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaPairRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.Function2;import org.apache.spark.api.java.function.VoidFunction;import scala.T…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.VoidFunction; import java.util.Arrays;import java.util.List; /** *sampleoperator(wi…

import org.apache.spark.SparkConf;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.spark.api.java.function.VoidFunction;import java.…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaPairRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.VoidFunction;import scala.Tuple2; import java.util.Arrays;import java.util.List…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaPairRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.VoidFunction;import scala.Tuple2; import java.util.Arrays;import java.util.List…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaPairRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.VoidFunction;import scala.Tuple2;import java.util.Arrays;import java.util.List;…

import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext; import java.util.Arrays;import java.util.List; /** * take(n) * 将RDD中的前多少数据返回过来,返回结果为数据形式 * */public class TakeOperator { pub…

算子分为value-transform, key-value-transform, action三种.f是输入给算子的函数,比如lambda x: x**2 常用算子: keys: 取pair rdd的key部分 values: 取pair rdd的value部分 map: f作用于每个元素 flatMap: f作用于每个元素.输出list,然后对list压平 mapValues: f作用于pair rdd的value部分 flatMapValues: f作用于pair rdd的value部分,…

package com.test; import java.util.ArrayList; import java.util.List; import java.util.Map; import org.apache.spark.Partitioner; import org.apache.spark.SparkConf; import org.apache.spark.api.java.JavaPairRDD; import org.apache.spark.api.java.JavaRDD;…

package com.test; import java.util.ArrayList; import java.util.Arrays; import java.util.Iterator; import java.util.List; import java.util.Map; import org.apache.spark.SparkConf; import org.apache.spark.api.java.JavaPairRDD; import org.apache.spark.ap…

一.Transformation spark常用的Transformation算子如下表: Transformation算子 Meaning(含义) map(func) 对原RDD中每个元素运用 func 函数,并生成新的RDD filter(func) 对原RDD中每个元素使用func 函数进行过滤,并生成新的RDD flatMap(func) 与 map 类似,但是每一个输入的 item 被映射成 0 个或多个输出的 items( func 返回类型需要为 Seq ). mapPartiti…

一.Transformation spark 常用的 Transformation 算子如下表: Transformation 算子 Meaning(含义) map(func) 对原 RDD 中每个元素运用 func 函数,并生成新的 RDD filter(func) 对原 RDD 中每个元素使用func 函数进行过滤,并生成新的 RDD flatMap(func) 与 map 类似,但是每一个输入的 item 被映射成 0 个或多个输出的 items( func 返回类型需要为 Seq ).…