scala 读取txt文件的方法示例

package txt object ReadTxt {  def readFromTxtByLine(filePath:String) = { //导入Scala的IO包 import scala.io.Source //以指定的UTF-8字符集读取文件，第一个参数可以是字符串或者是java.io.File val source = Source.fromFile(filePath, "UTF-8") //或取文件中所有行 //val lineIterator = source.getLines() //迭代打印所有行 //lineIterator.foreach() //将所有行放到数组中 val lines = source.getLines().toArray source.close() //println(lines.size) lines }  def LackingFileUtil(array:Array[String],keyMap:Map[String,String]) = { // 使用for循环和until遍历Array / ArrayBuffer // 使until是RichInt提供的函数 var lockMapList = List[Map[String,String]]() for (i <- 0 until array.length){  if(i==0){  val lineArray = array(i).trim.split("//|")  lockMapList = lockMapList :+ Map("id"->lineArray(0).trim,"name"->lineArray(1).trim,"pass"->lineArray(2).trim)  }else{  val lineArray = array(i).split(",")  if(lineArray.length==3){   lockMapList = lockMapList :+ Map("id"->lineArray(0).trim,"name"->lineArray(1).trim,"pass"->lineArray(2).trim)  }else if(lineArray.length==2){   val pass = keyMap.getOrElse(lineArray(0).trim,lineArray(1).trim)   lockMapList = lockMapList :+ Map("id"->lineArray(0).trim,"name"->lineArray(1).trim,"pass"->pass.trim)  }else if(lineArray.length==1){   lockMapList = lockMapList :+ Map("id"->lineArray(0).trim,"name"->"","pass"->"")  }else{   lockMapList = lockMapList :+ Map("id"->"-","name"->"","pass"->"")  }  }  //println(array(i)) } lockMapList  // 跳跃遍历Array / ArrayBuffer /*for(i <- 0 until (array.length, 2))  println(array(i))*/  // 从尾部遍历Array / ArrayBuffer /*for(i <- (0 until array.length).reverse)  println(array(i))*/  // 使用“增强for循环”遍历Array / ArrayBuffer /*for (e <- array){  println(e)  e.split(",").mkString }*/  }  def KeyFileUtil(array:Array[String]) = { var keyMapList = Map[String, String]() for (i <- 0 until array.length) {  //println(array(i))  val lineArray = array(i).trim.split(",")  //println(lineArray.size)  if(lineArray.size==2){  keyMapList = keyMapList ++ Map(lineArray(0).trim -> lineArray(1).trim)  }else if(lineArray.size==1){  keyMapList = keyMapList ++ Map(lineArray(0).trim -> "")  }else{  keyMapList = keyMapList ++ Map("-" -> "")  } } keyMapList }  def isEmpty(s: String): Boolean = (s == null) || (s.size==0)}

package txt import scala.reflect.io.File  object App {  def main(args: Array[String]): Unit = {  val key = ReadTxt.readFromTxtByLine("D:"+File.separator+"workspace"+File.separator+"source.txt") //println(key.mkString) val keyMap = ReadTxt.KeyFileUtil(key)  //println(keyMap)   val lack = ReadTxt.readFromTxtByLine("D:"+File.separator+"workspace"+File.separator+"source1.txt")  val lockMapList = ReadTxt.LackingFileUtil(lack,keyMap)  println(lockMapList)   }}