java - 将日志文件解析为 CSV 格式

Question

我正在尝试开发一小段代码，帮助我分隔一个日志文件，该文件存储了一周内发送的大量到不同 IP 的跟踪路由。

我希望在每个跟踪路由的开头和结尾使用“--- START ---”和“--- END ---”标记来分割它们。示例如下:

--- START ---
Mon Mar 12 22:45:05 GMT 2012
traceroute to xxxxxxx (xxxxxxxx), 30 hops max, 60 byte packets
1  xxxxxxx (xxxxx)  1.085 ms  1.662 ms  2.244 ms
2  xxxxxxxx (xxxxxxx)  0.792 ms  0.782 ms  0.772 ms
3  xxxxxxxxx (xxxxxxxxx)  8.545 ms  9.170 ms  9.644 ms
4  etc
5  etc
--- END ---
--- START ---
Mon Mar 12 22:45:05 GMT 2012
traceroute to xxxxxxxxx (xxxxxxxx), 30 hops max, 60 byte packets
1  139.222.0.1 (xxxxxxxxx)  0.925 ms  1.318 ms  1.954 ms
2  10.0.0.1 (xxxxxxxx)  0.345 ms  0.438 ms  0.496 ms
3  172.16.0.34 (xxxxxxxxx)  0.830 ms  2.553 ms  0.809 ms
4 etc
5 etc
6 etc
--- END ---

任何人都可以帮助我了解如何在 matlab 或 java 中完成此操作...我还尝试计算每个跟踪路由的跳数。这是抛出 --- END --- 标签之前给出的数字...

任何帮助将不胜感激，

干杯。

Answer 1

快速但肮脏的例子:

import java.io.*;
import java.text.*;
import java.util.*;
import java.util.regex.*;

public class Main
{
  private static class Record
  {
    public Date date;

    public String to;
    public int hops;
    public int packetSize;

    public String toString()
    {
      return date + " ::: " + to + ", " + hops + " hops, "
        + packetSize + " bytes";
    }
  }

  public static void main(String[] args) throws Exception
  {
    Scanner s = new Scanner(new FileReader(new File("input.txt")));

    Record currentRecord = null;
    ArrayList<Record> list = new ArrayList<Record>();

    while (s.hasNextLine()) {
      String line = s.nextLine();

      if ("--- START ---".equals(line)) {
        currentRecord = new Record();

      } else if ("--- END ---".equals(line)) {
        list.add(currentRecord);
        currentRecord = null;

      } else if (currentRecord.date == null) {
        currentRecord.date = new SimpleDateFormat(
          "EEE MMM dd HH:mm:ss zzz yyyy").parse(line);

      } else if (line.startsWith("traceroute to ")) {
        Pattern p = Pattern.compile(
          "traceroute to ([^ ]+) [^,]+, ([^ ]+) hops max, ([^ ]+) byte packets");
        Matcher m = p.matcher(line);

        if (m.matches()) {
          currentRecord.to = m.group(1);
          currentRecord.hops = Integer.parseInt(m.group(2));
          currentRecord.packetSize = Integer.parseInt(m.group(3));
        }
      }
    }

    for (int i = 0; i < list.size(); i++)
      System.out.println(list.get(i).toString());
  }

}

输出:

Tue Mar 13 04:15:05 GMT+05:30 2012 ::: 203.98.69.105, 30 hops, 60 bytes
Tue Mar 13 04:15:05 GMT+05:30 2012 ::: 62.193.36.27, 30 hops, 60 bytes

我为您指出了许多不同的方向(Scanner、Pattern、SimpleDateFormat 等)。对于各个“网关”项，您还可以使用 String.split()，并使用 ""(两个空格)作为分隔符。