read file in Scala

read file in scala:

for (file <- new File("/var/log/").listFiles) {

list a directory

if (!file.isDirectory) {

ask is file not a directory

simple print out of a file

import scala.io.Source  
  
for {  
  (line) <- Source.fromFile("bla.txt").getLines  
} print(line)  

read a file in an iterator

scala> val lines = scala.io.Source.fromFile("/var/log/syslog")
lines: scala.io.Source = non-empty iterator

scala> lines
res5: scala.io.Source = non-empty iterator

read a file in a string

val lines = scala.io.Source.fromFile("/var/log/syslog").mkString

// for utf-8 encoding
val lines = scala.io.Source.fromFile("file.txt", "utf-8").getLines.mkString

or you can use Java API

val os = new BufferedOutputStream(new FileOutputStream("gen/" + file.getName))