为什么我无法获取文件名

Question

输入是一个名为Wiki micro的文本文件。txt。。。字数计算程序运行正常。。我需要的是修改它

  public static class Map extends Mapper<LongWritable ,  Text ,  Text ,  IntWritable > {
  private final static IntWritable one  = new IntWritable( 1);
  private Text word  = new Text();

  private static final Pattern WORD_BOUNDARY = Pattern .compile("\\s*\\b\\s*");

  public void map( LongWritable offset,  Text lineText,  Context context)
    throws  IOException,  InterruptedException {

     String line  = lineText.toString();
     Text currentWord  = new Text();
     InputSplit input_split = context.getInputSplit();
     String FName = ((FileSplit) input_split).getPath().getName();

     for ( String word  : WORD_BOUNDARY .split(line)) {
        if (word.isEmpty()) {
           continue;
        }
        currentWord  = new Text(word);
        context.write(currentWord, one);
        context.write(new Text(FName), one);
     }
  }

}

Answer 1

不确定，但是如果你替换最后三行会发生什么：

        currentWord  = new Text(word);
        context.write(currentWord, one);
        context.write(new Text(FName), one);

具有

        currentWord  = new Text(word + "####" + FName);
        context.write(currentWord, one);
        context.write(new Text(FName), one);