11.21

import java.io.PrintWriter
import scala.io.Source

object Test11_21 {
  def main(args: Array[String]): Unit = {
    //1.txt.
    val content = Source.fromFile("1.txt").mkString
    println(content)
    //2.
    val arr = content.split("\\W+")
    for(word <- arr)
      println(word)
    }
  //3.
    val wordMap = scala.collection.mutable.Map[String,Int]()
    for(w <- arr){
      val word = w.toLowerCase()
      if(wordMap.contains(word)){
        wordMap(word) += 1
      }else{
      wordMap(word) = 1
    }
  }
  //4.
  println(wordMap.toList)
  val orderWordList = wordMap.toList.sortWith((a,b)=> a._2 > b._2).filter(e=>e._1.length>2).slice(0,30)
  //5.
  for(e <- orderWordList){
    println(e)
  }
  val writer = new PrintWriter("out.txt")
  writer.println("结果是：")
  writer.println("the:20次")
  writer.close()
}