scala 读取txt文件的方法示例

scala 读取txt文件的方法示例

文件格式分别如下

package txt

object ReadTxt {

def rdcvRcaYBieadFromTxtByLine(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 :+ MdcvRcaYBiap("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 = Reahttp://dTxt.LackingFileUtil(lack,keyMap)

println(lockMapList)

}

}

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