hbase 0.94一些基本操作测试代码

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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 stubConfiguration 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 stubConfiguration 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 stubConfiguration 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 stubConfiguration 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();}}}