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This article focuses on "how to write data in a specified format to a file with Scala". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to write data in a specified format to a file using Scala.

Create a new FileOps object:

Package com.ruozedata.day3

Import java.io. {File,PrintWriter}

Import java.text.SimpleDateFormat

Import java.util. {Calendar, Date}

/ / import scala.io.Source

Object FileOps {

Def main (args: Array [String]): Unit = {

/ / File reading

/ / val file = Source.fromFile ("D:\ software\\ data\\ scalaIO.txt")

/ / file.foreach (print)

/ / file.close () getTracffic ()

/ * *

* File format:

* domain tracffic time

* www.ruozedata.com64447 [2018-07-17 07:39:57]

* www.ruozedata.com13781 [2018-07-11 06:52:41]

, /

/ / File write

/ / load file D:\ software\ data\ ScalaWriter.txt will be created if not

Val writer = new PrintWriter (new File ("D:\\ software\\ data\\ ScalaWriter.txt")

Writer.flush (); / / clear the file contents

/ / enter the title field: domain tracffic time

/ / writer.println ("domain\ ttracffic\ ttime")

/ / define an array of URLs

Val arr = Array ("www.ruozedata.com", "www.zhibo8.com", "www.dongqiudi.com")

/ / defines a 26-letter array for randomly writing values (not numbers) to the tracffic field

Val arr2 = Array ("a", "b", "c", "d", "e", "f", "g", "h", "I", "j", "k", "l", "m", "n", "o", "p", "Q", "r", "s", "t", "u", "v", "w", "x", "y", "z")

/ / define a collection of numbers

Val arr3 = (10000 to 99999) .toArray

/ / variable used to receive tracic value

Var ele = ""

For (I)

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