scala读写文件

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

//1 read
  for( i<- Source.fromFile("test.dat").getLines().toArray){
     println(i)
   }
   // 2 read
  println(Source.fromFile("test.dat").mkString)
   
//1write
val out = new PrintWriter("test.dat")
   for (i<-1 to 100) out.println(i)
   out.close()
}