ExcelMapper.java

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package com.milind.mr.excel;

/**
*
* @author milind
*/
import java.io.IOException;

import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ExcelMapper extends
Mapper<LongWritable, Text, Text, Text> {

private static Logger LOG = LoggerFactory.getLogger(ExcelMapper.class);

/**
* Excel Spreadsheet is supplied in string form to the mapper. We are simply
* emitting them for viewing on HDFS.
*/
public void map(LongWritable key, Text value, Context context)
throws InterruptedException, IOException {
String line = value.toString();

context.write(new Text(line), null);
LOG.info("Map processing finished");

}
}

This is a Mapper Class which is used for reading Excel file using MapReduce API