hbase 0.94一些基本操作测试代码_0.94.1版本的hbase中数据库表用代码实现-优快云博客

本文链接：https://blog.youkuaiyun.com/pigHead_chen/article/details/8980470

本文档介绍了HBase 0.94版本中的一些基础操作，包括使用Get方法获取数据，使用Put方法插入单条及多条数据，并详细阐述了Partical Key Scan如何扫描指定范围内Row Key的操作流程。

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1，用Get方法

package hTableManagement;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.util.Bytes;

public class GetRow {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		Configuration conf = HBaseConfiguration.create();
		
		HTable table = new HTable(conf, "ub");
		
		Get get = new Get(Bytes.toBytes("row-1"));
		get.setMaxVersions(3);
		Result r = table.get(get);
		System.out.println(r.size());
		System.out.println(Bytes.toString(r.value()));
		for(KeyValue kv : r.raw()) {
			System.out.println(Bytes.toString(kv.getRow()));
			System.out.println(Bytes.toString(kv.getQualifier()) + ":" + Bytes.toString(kv.getValue()));
		}
		System.out.println(r);
	}

}

2，向hbase put一条数据

package hTableManagement;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.util.Bytes;

public class PutTable {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		Configuration conf = HBaseConfiguration.create();
		
		HTable table = new HTable(conf, "ub");
		
		Put put = new Put(Bytes.toBytes("row-145"));
		
		put.add(Bytes.toBytes("cf"), Bytes.toBytes("tmp"), 1, Bytes.toBytes("value-2"));
		
		table.put(put);
	}

}

3，put多条数据

package hTableManagement;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.util.Bytes;

public class PutList {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		Configuration conf = HBaseConfiguration.create();
		
		HTable table = new HTable(conf, "ub");
		List<Put> puts = new ArrayList<Put>();
		Put put = new Put(Bytes.toBytes("row-1"));
		
		put.add(Bytes.toBytes("cf"), Bytes.toBytes("tmp2"), 2, Bytes.toBytes("value-tmp2"));
		
		Put put2 = new Put(Bytes.toBytes("row-1"));
		
		put2.add(Bytes.toBytes("cf"), Bytes.toBytes("tmp2"), 2, Bytes.toBytes("value-tmp3"));
		puts.add(put);
		puts.add(put2);
		table.put(puts);
	}

}

4，Partical Key Scan扫描一定范围内的row key

package hTableManagement;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.util.Bytes;

public class ScanParticalKey {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		Configuration conf = HBaseConfiguration.create();
		
		HTable table = new HTable(conf, "p9");
		
		Scan scan = new Scan();
		scan.setStartRow(Bytes.toBytes("5e172404-1345719473421-224269"));
		scan.setStopRow(Bytes.toBytes("5e172404-1345719473421-2242698"));
		scan.addColumn(Bytes.toBytes("cf"), Bytes.toBytes("p1"));
		ResultScanner rs = table.getScanner(scan);
		try
		{
			for(Result rr = rs.next(); rr != null; rr = rs.next()) {
				System.out.println("Found Row:" + rr);
			}
		}
		catch(Exception e) {
			e.printStackTrace();
			rs.close();
		}
	}

}