统计HDFS 上字节数据统计

class HDFSWordCount {
  def  main (args: Array[String]) {
    if (args.length > 0){
      for (line <- Source.fromFile(args(0)).getLines().toList)  //求最大长度
        println(line.length +" " +line)
    }
    else  Console.err.print("please enter fileName")
  }
  //对文件的每行记录打印格式的字符量化
  def widthOfLength(s: String) = s.length.toString.length
  if (args.length > 0){
    val lines = Source.fromFile(args(0)).getLines.toList
    val longetLine = lines.reduceLeft(
      (a, b) => if (a.length > b.length) a else b
    )
    val maxWidth = widthOfLength(longetLine)
    for (line <- lines){
      val numSpace = maxWidth widthOfLength(line)
      val padding = " " * numSpace
      println(padding +line.length + "|" +line)
    }
  }

}