package com.mr.test;
import java.io.IOException;
import java.util.Iterator;
import java.util.StringTokenizer;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.FileInputFormat;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.Mapper;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.Reducer;
import org.apache.hadoop.mapred.Reporter;
import org.apache.hadoop.mapred.TextInputFormat;
import org.apache.hadoop.mapred.TextOutputFormat;
import org.apache.hadoop.mapred.lib.MultipleOutputs;
public class WordCount {
public static class MyMap 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);
}
}
public void configure(JobConf arg0) {
}
public void close() throws IOException {
// TODO Auto-generated method stub
}
}
//本欄目
test1
test2
test3
test4
test5
output:
-rw-r--r-- 2 test supergroup 0 2014-04-20 11:23 /chukwa/output/0419-10/_SUCCESS
drwxr-xr-x - test supergroup 0 2014-04-20 11:23 /chukwa/output/0419-10/_logs
-rw-r--r-- 2 test supergroup 42 2014-04-20 11:23 /chukwa/output/0419-10/part-00000.lzo
-rw-r--r-- 2 test supergroup 58 2014-04-20 11:23 /chukwa/output/0419-10/test1-m-00000.lzo
-rw-r--r-- 2 test supergroup 58 2014-04-20 11:23 /chukwa/output/0419-10/test2-m-00000.lzo
-rw-r--r-- 2 test supergroup 58 2014-04-20 11:23 /chukwa/output/0419-10/test3-m-00000.lzo
-rw-r--r-- 2test supergroup 58 2014-04-20 11:23 /chukwa/output/0419-10/test4-m-00001.lzo
-rw-r--r-- 2 test supergroup 58 2014-04-20 11:23 /chukwa/output/0419-10/test5-m-00001.lzo
