摘要：
[hadoop@isstech001 ~]$ spark-submit --class WordCount /home/hadoop/WordCount.jar Using Spark's default log4j profile: org/apache/spark/log4j-defaults.properties 18/12/04 21:35:11 INFO SparkContext: R... 阅读全文
摘要：
import scala.io.Source val inputFile = Source.fromFile("output.txt") val lines = inputFile.getLines for (line <- lines) println(line) //1、本地文件读取 val local_file_1 = sc.textFile("/home/hadoop/... 阅读全文
摘要：
//写入文本文件 //写入文件Scala需要使用java.io.PrintWriter实现把数据写入到文本文件。 import java.io.PrintWriter val out = new PrintWriter("output.txt") for (i <- 1 to 5) out.println(i) out.close() //写入文件时指定目录 import java.... 阅读全文
摘要：
val i = 5; val j = 8; printf("My name is %s. I hava %d apples and %d eggs.\n","wpGwoc",i,j) 阅读全文
摘要：
1 to 10 1.to(10) 1 until 10 1 to 10 by 2 0.5f to 5.9f by 0.2f 阅读全文
摘要：
/1、本地文件读取 val local_file_1 = sc.textFile("/home/hadoop/sp.txt") val local_file_2 = sc.textFile("file://home/hadoop/sp.txt") //2、当前目录下的文件 val file1 = sc.textFile("sp.txt") //3、HDFS文件 val hdfs_file1 ... 阅读全文