HBase java——Scan中获取列限定符、行键、单元值

Scan整个表,遍历各行数据，如何得到每行数据的列限定符、行键和单元值？

hbase中表followlist2 内容（hbase shell）

import java.io.IOException;import java.util.Iterator;import java.util.List;import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.hbase.HBaseConfiguration;import org.apache.hadoop.hbase.HColumnDescriptor;import org.apache.hadoop.hbase.HTableDescriptor;import org.apache.hadoop.hbase.KeyValue;import org.apache.hadoop.hbase.MasterNotRunningException;import org.apache.hadoop.hbase.ZooKeeperConnectionException;import org.apache.hadoop.hbase.client.Get;import org.apache.hadoop.hbase.client.HBaseAdmin;import org.apache.hadoop.hbase.client.HTableInterface;import org.apache.hadoop.hbase.client.HTablePool;import org.apache.hadoop.hbase.client.Put;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;@SuppressWarnings("deprecation")public class Follow2 {static Configuration cfg = HBaseConfiguration.create();@SuppressWarnings({ "resource" })public static void main(String[] args) throws MasterNotRunningException, ZooKeeperConnectionException, IOException{String tb = "followlist2";String cf = "follows";byte[] bcf = Bytes.toBytes(cf);HBaseAdmin admin = new HBaseAdmin(cfg);HTablePool pool = new HTablePool();//check Fake关注Real了没byte[] real = Bytes.toBytes("TheRealMT");HTableInterface table=pool.getTable(tb);Get g = new Get(Bytes.toBytes("TheFakeMT"));g.addColumn(bcf, real);Result r = table.get(g);byte[] value = r.getValue(bcf, real);if(value!=null)System.out.println("Exist!");else{System.out.println("Don't exist!");}Scan s = new Scan(); ResultScanner rs =table.getScanner(s); System.out.println("Scan Result: "); for(Result rr:rs){ List<keyvalue> list = rr.list(); for(KeyValue kv:list){ System.out.print("行键: "+Bytes.toString(kv.getRow()));//获取行键 System.out.print("\t列族: "+Bytes.toString(kv.getFamily()));//获取列族 System.out.print("\t列限定符: "+Bytes.toString(kv.getQualifier()));//获取列限定符 System.out.println("\t单元值: "+Bytes.toInt(kv.getValue()));//获取单元值 } System.out.println(); } table.close();}}

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