使用mapreduce从日志文件中提取点击计数

我正在尝试在中编写以下代码Hadoop map-reduce。我有一个日志文件，其中包含IP地址以及由其后的各个IP打开的URL。如下：

192.168.72.224 www.m4maths.com
192.168.72.177 www.yahoo.com
192.168.72.177 www.yahoo.com
192.168.72.224 www.facebook.com
192.168.72.224 www.gmail.com
192.168.72.177 www.facebook.com
192.168.198.92 www.google.com
192.168.198.92 www.yahoo.com
192.168.72.224 www.google.com
192.168.72.177 www.yahoo.com
192.168.198.92 www.google.com
192.168.72.224 www.indiabix.com
192.168.72.177 www.yahoo.com
192.168.72.224 www.google.com
192.168.72.177 www.yahoo.com
192.168.72.224 www.yahoo.com
192.168.198.92 www.m4maths.com
192.168.198.92 www.facebook.com
192.168.72.224 www.gmail.com
192.168.72.177 www.google.com
192.168.72.224 www.indiabix.com
192.168.72.224 www.indiabix.com
192.168.72.177 www.m4maths.com
192.168.72.224 www.indiabix.com
192.168.198.92 www.google.com
192.168.72.177 www.yahoo.com
192.168.198.92 www.yahoo.com
192.168.72.177 www.yahoo.com
192.168.198.92 www.facebook.com
192.168.198.92 www.indiabix.com
192.168.72.177 www.indiabix.com
192.168.72.224 www.google.com
192.168.198.92 www.askubuntu.com
192.168.198.92 www.askubuntu.com
192.168.198.92 www.facebook.com
192.168.198.92 www.gmail.com
192.168.72.177 www.facebook.com
192.168.72.177 www.yahoo.com
192.168.198.92 www.m4maths.com
192.168.72.224 www.yahoo.com
192.168.72.177 www.google.com
192.168.72.177 www.m4maths.com
192.168.72.177 www.yahoo.com
192.168.72.224 www.m4maths.com
192.168.72.177 www.yahoo.com
192.168.72.177 www.yahoo.com
192.168.72.224 www.facebook.com
192.168.72.224 www.gmail.com
192.168.72.177 www.facebook.com
192.168.198.92 www.google.com
192.168.198.92 www.yahoo.com
192.168.72.224 www.google.com
192.168.72.177 www.yahoo.com
192.168.198.92 www.google.com
192.168.72.224 www.indiabix.com
192.168.72.177 www.yahoo.com
192.168.72.224 www.google.com
192.168.72.177 www.yahoo.com
192.168.72.224 www.yahoo.com
192.168.198.92 www.m4maths.com
192.168.198.92 www.facebook.com
192.168.72.224 www.gmail.com
192.168.72.177 www.google.com
192.168.72.224 www.indiabix.com
192.168.72.224 www.indiabix.com
192.168.72.177 www.m4maths.com
192.168.72.224 www.indiabix.com

现在，我需要以这种方式来组织该文件的结果，使其列出带有Urls的不同IP地址，然后是该IP打开特定文件的次数。

例如，如果按照整个日志文件192.168.72.224打开www.yahoo.com15次，则输出必须包含：

192.168.72.224 www.yahoo.com 15

应该对文件中的所有IP执行此操作，最终输出应如下所示：

192.168.72.224 www.yahoo.com 15
               www.m4maths.com 11
192.168.72.177 www.yahoo.com 6
               www.gmail.com 19
....
...
..
.

我尝试过的代码是：

public class WordCountMapper extends MapReduceBase implements Mapper<LongWritable, Text, Text, IntWritable>
{
            private final static IntWritable one = new IntWritable(1);
      private Text word = new Text();
                 public void map(LongWritable key, Text value, OutputCollector<Text, IntWritable> output, Reporter reporter) throws IOException
      {
                       String line = value.toString();
            StringTokenizer tokenizer = new StringTokenizer(line);

                     while (tokenizer.hasMoreTokens())
            {
               word.set(tokenizer.nextToken());
                              output.collect(word, one);
            }
       }
}

我知道此代码存在严重缺陷，请向我提出一个前进的想法。

谢谢你。