mapreduce LineCount

Question

太难了！！有没有大佬教教我！！！！！Eclipse根本没什么反应！！！！

Answer 1

啥年代了还用eclipse，
骚年，试试idea吧
真香

package com.hpu.hadoop.test;

import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;

import java.io.IOException;

/**
 * @author zyn
 * @version 1.0
 */
public class TMapper extends Mapper<LongWritable, Text,Text, NullWritable> {
    private int lineNum = 0;


    @Override
    protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
        lineNum++;
        context.write(value,NullWritable.get());
    }

    @Override
    protected void cleanup(Context context) throws IOException, InterruptedException {
        System.out.println("------------"+lineNum);
    }
}