我在hbase中有一个大表，名字是Hweather。这个表有一些像这样的列家庭： Hweather（省，市，站，即时）。
此列族具有自己的列限定符。 所以我想选择或意味着当列家族是Instant，当rowkey前缀是16,20时，扫描两列（Date，temperature），然后当前缀rowkey为17,20时停止扫描操作。
这意味着开始行是16,20，... 停止行是17,20，...
所以我尝试在java中这样做。但是我确实得到了任何答案。你能帮我纠正这个并做这个操作吗？
代码如下：
package scan;
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.filter.Filter;
import org.apache.hadoop.hbase.filter.PrefixFilter;
import org.apache.hadoop.hbase.util.Bytes;
public class scan2 {
public static void main(String args[]) throws NoClassDefFoundError, IOException {
Configuration config = HBaseConfiguration.create();
config.set("hbase.zookeeper.quorum", "localhost");
HTable table = new HTable(config, "Hweather");
Filter colfilter=new PrefixFilter(Bytes.toBytes("Date"));
Filter colfilter1=new PrefixFilter(Bytes.toBytes("Temperature"));
Scan scan1 = new Scan(Bytes.toBytes("16,20,100,1"),(Bytes.toBytes("17,20,100,1")));
Scan scan2 = new Scan(Bytes.toBytes("16,20,100,1"),(Bytes.toBytes("17,20,100,1")));
scan1.setFilter(colfilter1);
scan2.setFilter(colfilter2);
ResultScanner scanner1= table.getScanner(scan1);
ResultScanner scanner2= table.getScanner(scan2);
for (Result result1= scanner1.next(); result1 !=null; result1= scanner1.next()) {
for (Result result2= scanner2.next(); result2 !=null; result2= scanner2.next()) {
System.out.println("scanner1" + "scanner2");
}
}
}
}
它不起作用，只是告诉我：
2013-11-10 16:20:20,959 INFO [main] zookeeper.ZooKeeper
(Environment.java:logEnv(100)) - Client environment:zookeeper.version=3.4.5-1392090,
built on 09/30/2012 17:52 GMT
2013-11-10 16:20:20,963 INFO [main] zookeeper.ZooKeeper (Envi
ronment.java:logEnv(100)) - Client environment:host.name=localhost
2013-11-10 16:20:20,963 INFO [main] zookeeper.ZooKeeper
(Environment.java:logEnv(100)) - Client environment:java.version=1.6.0_27
2013-11-10 16:20:20,964 INFO [main] zookeeper.ZooKeeper
(Environment.java:logEnv(100)) - Client environment:java.vendor=Sun Microsystems Inc.
2013-11-10 16:20:20,964 INFO [main] zookeeper.ZooKeeper
(Environment.java:logEnv(100)) - Client environment:java.home=/usr/lib/jvm/java-
6-openjdk-i386/jre
2013-11-10 16:20:20,969 INFO [main] zookeeper.ZooKeeper
(Environment.java:logEnv(100)) - Client environment:java.class.path=/home/ubuntu
/workspace/Scan/bin:/usr/local/hadoop/lib/hadoop-yarn-server-web-proxy-2.0.2-alpha.jar:
/usr/local/hadoop/lib/hbase-protocol-0.95.0-hadoop2.jar:/usr/local/hadoop/lib/hadoop-
fairscheduler-1.0.4.jar:/usr/local/hadoop/lib/hadoop-minicluster-2.0.2-alpha.jar:
/usr/local/hadoop/lib/hadoop-yarn-api-2.0.2-alpha.jar:/usr/local/hadoop/lib/hadoop-
mapreduce-client-app-2.0.2-alpha.jar:/usr/local/hadoop/lib/hadoop-auth-2.0.2-alpha.jar:
/usr/local/hadoop/lib/hadoop-yarn-common-2.0.2-alpha.jar:/usr/local/hadoop/lib/hadoop-
mapreduce-client-common-2.0.2-alpha.jar:/usr/local/hadoop/lib/hbase-common-0.95.0-
hadoop2.jar:/usr/local/hadoop/lib/hbase-it-0.95.0-hadoop2.jar:/usr/local/hadoop
/lib/hbase-client-0.95.0-hadoop2.jar:/usr/local/hadoop/lib/hadoop-hdfs-2.0.2-alpha.jar:
/usr/local/hadoop/lib/hadoop-thriftfs-1.0.4.jar:/usr/local/hadoop/lib/hbase-hadoop-c
ompat-0.95.0-hadoop2.jar:/usr/local/hadoop/lib/hadoop-yarn-server-common-2.0.2-
alpha.jar:/usr/local/hadoop/lib/hadoop-mapreduce-client-hs-2.0.2-alpha.jar:/usr/local
/hadoop/lib/hadoop-mapreduce-client-core-2.0.2-alpha.jar:/usr/local/hadoop/lib/hadoop-
mapreduce-client-jobclient-2.0.2-alpha.jar:/usr/local/hadoop/lib/hadoop-yarn-server-
nodemanager-2.0.2-alpha.jar:/usr/local/hadoop/lib/hadoop-annotations-2.0.2-alpha.jar:
/usr/local/hadoop/lib/hadoop-common-2.0.2-alpha.jar:/usr/local/hadoop/lib/hadoop-
yarn-client-2.0.2-alpha.jar:/usr/local/hadoop/lib/hbase-server-0.95.0-hadoop2.jar:
/usr/local/hadoop/lib/hadoop-capacity-scheduler-1.0.4.jar:/usr/local/hadoop/lib/hadoop-
mapreduce-client-shuffle-2.0.2-alpha.jar:/usr/local/hadoop/lib/hadoop-client-2.0.2-
alpha.jar:/usr/local/hadoop/lib/hbase-prefix-tree-0.95.0-hadoop2.jar:/usr/local/hadoop
/lib/hbase-hadoop2-compat-0.95.0-hadoop2.jar:/usr/local/hadoop/lib/hadoop-yarn-server-
resourcemanager-2.0.2-alpha.jar:/usr/local/hadoop/lib/hbase-0.20.0.jar:/usr/local
/hadoop/lib/activation-1.1.jar:/usr/local/hadoop/lib/aopalliance-1.0.jar:/usr/local
/hadoop/lib/asm-3.1.jar:/usr/local/hadoop/lib/asm-3.2.jar:/usr/local/hadoop
.........
2013-11-10 16:20:20,970 INFO [main] zookeeper.ZooKeeper
(Environment.java:logEnv(100)) - Client environment:java.compiler=<NA>
2013-11-10 16:20:20,971 INFO [main] zookeeper.ZooKeeper
(Environment.java:logEnv(100)) - Client environment:os.name=Linux
2013-11-10 16:20:20,971 INFO [main] zookeeper.ZooKeeper
(Environment.java:logEnv(100)) - Client environment:os.arch=i386
2013-11-10 16:20:20,972 INFO [main] zookeeper.ZooKeeper
(Environment.java:logEnv(100)) - Client environment:os.version=3.2.0-23-generic-pae
2013-11-10 16:20:20,972 INFO [main] zookeeper.ZooKeeper
(Environment.java:logEnv(100)) - Client environment:user.name=ubuntu
2013-11-10 16:20:20,972 INFO [main] zookeeper.ZooKeeper
(Environment.java:logEnv(100)) - Client environment:user.home=/home/ubuntu
2013-11-10 16:20:20,973 INFO [main] zookeeper.ZooKeeper
(Environment.java:logEnv(100)) - Client environment:user.dir=/home/ubuntu/workspace
/Scan
2013-11-10 16:20:20,974 INFO [main] zookeeper.ZooKeeper (ZooKeeper.java:<init>(438)) -
Initiating client connection, connectString=localhost:2181 sessionTimeout=180000
watcher=hconnection-0x16546ef
2013-11-10 16:20:21,002 INFO [main-SendThread(localhost:2181)] zookeeper.ClientCnxn
(ClientCnxn.java:logStartConnect(966)) - Opening socket connection to server
localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
2013-11-10 16:20:21,004 INFO [main] zookeeper.RecoverableZooKeeper
(RecoverableZooKeeper.java:<init>(119)) - The identifier of this process is
hconnection-0x16546ef
2013-11-10 16:20:21,017 INFO [main-SendThread(localhost:2181)] zookeeper.ClientCnxn
(ClientCnxn.java:primeConnection(849)) - Socket connection established to
localhost/127.0.0.1:2181, initiating session
2013-11-10 16:20:21,038 INFO [main-SendThread(localhost:2181)] zookeeper.ClientCnxn
(ClientCnxn.java:onConnected(1207)) - Session establishment complete on server
localhost/127.0.0.1:2181, sessionid = 0x14241e6ac200005, negotiated timeout = 40000
2013-11-10 16:20:21,116 INFO [main]
client.HConnectionManager$HConnectionImplementation
(HConnectionManager.java:retrieveClusterId(680)) - ClusterId is f6e88331-aea1-4bd3-
a579-f4a22524d9cf
2013-11-10 16:20:21,385 WARN [main] conf.Configuration
(Configuration.java:warnOnceIfDeprecated(816)) - hadoop.native.lib is deprecated.
Instead, use io.native.lib.available
并且不要给我任何外出。你可以指导我如何纠正它。或者我怎么能这样做？
谢谢
答案 0 :(得分：0)
试试这个，看看是否有帮助：
public class PrefixFilterDemo {
public static void main(String[] args) throws IOException {
Configuration conf = HBaseConfiguration.create();
HTable table = new HTable(conf, "Hweather");
Scan s = new Scan();
s.addColumn(Bytes.toBytes("Instant"), Bytes.toBytes("Date"));
s.addColumn(Bytes.toBytes("Instant"), Bytes.toBytes("Temprature"));
Filter f = new PrefixFilter(Bytes.toBytes("16,20"));
s.setFilter(f);
ResultScanner rs = table.getScanner(s);
for(Result r : rs){
System.out.println("ROW : " + Bytes.toString(r.getRow()));
}
rs.close();
table.close();
}
}