输入流是这样工作的:一旦你从中读取了一部分，它就永远消失了.你不能回去重新阅读它.你可以做的是这样的:

Input stream work like this: once you read a portion from it, it's gone forever. You can't go back and re-read it. what you could do is something like this:

class InputStreamSplitter {
  InputStreamSplitter(InputStream toReadFrom) {
    this.reader = new InputStreamReader(toReadFrom);
  }
  void addListener(Listener l) {
    this.listeners.add(l);
  }
  void work() {
    String line = this.reader.readLine();
        while(line != null) {
      for(Listener l : this.listeners) {
        l.processLine(line);
      }
    }
  }
}

interface Listener {
  processLine(String line);
}

让所有感兴趣的各方实现 Listener 并将它们添加到 InputStreamSplitter

have all interested parties implement Listener and add them to InputStreamSplitter