Hbase之批量数据写入

**

 * Created by similarface on 16/8/16.

 */

 

import java.io.IOException;

 

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.hbase.HBaseConfiguration;

import org.apache.hadoop.hbase.TableName;

import org.apache.hadoop.hbase.client.Connection;

import org.apache.hadoop.hbase.client.ConnectionFactory;

import org.apache.hadoop.hbase.client.Get;

import org.apache.hadoop.hbase.client.Table;

import org.apache.hadoop.hbase.client.Put;

import org.apache.hadoop.hbase.client.Result;

import org.apache.hadoop.hbase.util.Bytes;

import org.apache.hadoop.hbase.client.BufferedMutator;

import org.apache.hadoop.hbase.Cell;

import org.apache.hadoop.hbase.CellUtil;

import org.apache.hadoop.hbase.client.Mutation;

import java.util.List;

import java.util.ArrayList;

public class PutBufferExample {

    public static void main(String[] args) throws IOException {

        //获取陪着参数

        Configuration config = HBaseConfiguration.create();

        //建立连接

        Connection connection = ConnectionFactory.createConnection(config);

        try {

            //连接表 获取表对象

            Table t = connection.getTable(TableName.valueOf("testtable"));

            BufferedMutator table = connection.getBufferedMutator(TableName.valueOf("testtable"));

            try {

                Put p = new Put(Bytes.toBytes("myrow-1"));

                //p.add(); 这个地方的add 是个过期的方法然而我并不知道Cell的用法是什么

                p.add(Bytes.toBytes("colfam1"), Bytes.toBytes("name1"), Bytes.toBytes("zhangsan1"));

                //table.put(p);

                List<Mutation> mutations = new ArrayList<Mutation>();

                mutations.add(p);

                table.mutate(mutations);

                //如果不flush 在后面get可能是看不见的

                table.flush();

                // Close your table and cluster connection.

                Get get=new Get(Bytes.toBytes("myrow-1"));

                Result result=t.get(get);

                for(Cell cell:result.rawCells()){

                    System.out.print("行健: "+new String(CellUtil.cloneRow(cell)));

                    System.out.print("\t列簇: "+new String(CellUtil.cloneFamily(cell)));

                    System.out.print("\t列: "+new String(CellUtil.cloneQualifier(cell)));

                    System.out.print("\t值: "+new String(CellUtil.cloneValue(cell)));

                    System.out.println("\t时间戳: "+cell.getTimestamp());

                }

                System.out.print(">>>>end");

            } finally {

                if (table != null) table.close();

            }

        } finally {

            connection.close();

        }

    }

}