今天搞了个通过hdfs mapper读取文件插入到hbase表的简单实例，在这里记录一下，如下：

java代码(File2HBase1.java)：

package com.lyq.study.example;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
import org.apache.hadoop.hbase.mapreduce.TableOutputFormat;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;

public class File2HBase1 {

	public static class MapperClass extends
			Mapper<LongWritable, Text, ImmutableBytesWritable, Put> {
		//列名
		public static final String[] COLUMNS = { "card", "type",
				"amount", "time", "many" };
	
		public void map(LongWritable key, Text value, Context context)
				throws IOException, InterruptedException {
			String[] cloumnVals = value.toString().split(",");
			String rowkey = cloumnVals[0] + cloumnVals[3];
			Put put = new Put(rowkey.getBytes());
			for (int i = 0; i < cloumnVals.length; i++) {
				put.add("info".getBytes(), COLUMNS[i].getBytes(),
						cloumnVals[i].getBytes());
			}
			context.write(new ImmutableBytesWritable(rowkey.getBytes()), put);
		}
	}
	
	@SuppressWarnings("deprecation")
	public static void main(String[] args) throws IOException, InterruptedException, ClassNotFoundException {
		Configuration conf = new Configuration();
		conf.set("fs.defaultFS", "hdfs://ubuntu:9000/");
		conf.set("mapreduce.framework.name", "local");
		conf.set("mapred.job.tracker", "ubuntu:9001");
		conf.set("hbase.zookeeper.quorum", "ubuntu");
		Job job = new Job(conf,"file2hbase");
		job.setJarByClass(File2HBase1.class);
		job.setMapperClass(MapperClass.class);
		job.setNumReduceTasks(0);
		job.setOutputFormatClass(TableOutputFormat.class);
		job.getConfiguration().set(TableOutputFormat.OUTPUT_TABLE, "testtable1");
		FileInputFormat.addInputPath(job, new Path("hdfs://ubuntu:9000/test/input/data.txt"));
		System.out.println(job.waitForCompletion(true)  0 : 1);
	}
}

hbase创建表语气是：create 'testtable1','info'

data.txt的内容如下：

6222020405006,typeA,100000,201408081225,2000
6222020405006,typeA,100000,201408112351,1000
6222020405006,typeA,100000,201408140739,4000
6222020405008,typeB,50000,201408150932,5000
6222020405009,typeC,30000,201408181212,10000