Java连接HBASE数据库

1、引入所需要Jar包以及hbase-site.xml



2、创建源文件

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package hbase;

/**

*

*/

import java.io.IOException;

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.client.Get;

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

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

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;

public class HBaseTestCase {

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

String tableName = "test";

String columnFamily = "cf";

try {

if (true == HBaseTestCase.delete(tableName)) {

System.out.println("Delete Table " + tableName + " success!");

}

HBaseTestCase.create(tableName, columnFamily);

HBaseTestCase.put(tableName, "row1", columnFamily, "column1",

"data1");

HBaseTestCase.put(tableName, "row2", columnFamily, "column2",

"data2");

HBaseTestCase.put(tableName, "row3", columnFamily, "column3",

"data3");

HBaseTestCase.put(tableName, "row4", columnFamily, "column4",

"data4");

HBaseTestCase.put(tableName, "row5", columnFamily, "column5",

"data5");

HBaseTestCase.get(tableName, "row1");

HBaseTestCase.scan(tableName);

} catch (Exception e) {

e.printStackTrace();

}

}

static Configuration cfg = HBaseConfiguration.create();

static {

System.out.println(cfg.get("hbase.master"));

}

public static void create(String tableName, String columnFamily)

throws Exception {

HBaseAdmin admin = new HBaseAdmin(cfg);

if (admin.tableExists(tableName)) {

System.out.println(tableName + " exists!");

} else {

HTableDescriptor tableDesc = new HTableDescriptor(tableName);

tableDesc.addFamily(new HColumnDescriptor(columnFamily));

admin.createTable(tableDesc);

System.out.println(tableName + " create successfully!");

}

}

public static void put(String tablename, String row, String columnFamily,

String column, String data) throws Exception {

HTable table = new HTable(cfg, tablename);

Put put = new Put(Bytes.toBytes(row));

put.add(Bytes.toBytes(columnFamily), Bytes.toBytes(column),

Bytes.toBytes(data));

table.put(put);

System.out.println("put '" + row + "', '" + columnFamily + ":" + column

+ "', '" + data + "'");

}

public static void get(String tablename, String row) throws Exception {

HTable table = new HTable(cfg, tablename);

Get get = new Get(Bytes.toBytes(row));

Result result = table.get(get);

System.out.println("Get: " + result);

}

public static void scan(String tableName) throws Exception {

HTable table = new HTable(cfg, tableName);

Scan s = new Scan();

ResultScanner rs = table.getScanner(s);

for (Result r : rs) {

System.out.println("Scan: " + r);

}

}

public static boolean delete(String tableName) throws IOException {

HBaseAdmin admin = new HBaseAdmin(cfg);

if (admin.tableExists(tableName)) {

try {

admin.disableTable(tableName);

admin.deleteTable(tableName);

} catch (Exception e) {

e.printStackTrace();

return false;

}

}

return true;

}

}

3、执行结果

[plain] view
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null

14/07/06 14:13:01 INFO zookeeper.ZooKeeper: Client environment:zookeeper.version=3.4.5-1392090, built on 09/30/2012 17:52 GMT

14/07/06 14:13:01 INFO zookeeper.ZooKeeper: Client environment:host.name=lenovo-PC

14/07/06 14:13:01 INFO zookeeper.ZooKeeper: Client environment:java.version=1.6.0_43

14/07/06 14:13:01 INFO zookeeper.ZooKeeper: Client environment:java.vendor=Sun Microsystems Inc.

14/07/06 14:13:01 INFO zookeeper.ZooKeeper: Client environment:java.home=C:\Program Files\Java\jdk1.6.0_43\jre

14/07/06 14:13:01 INFO zookeeper.ZooKeeper: Client environment:java.class.path=E:\Work\workspace\hbase\bin;E:\Work\cygwin\usr\local\hbase-0.94.20\hbase-0.94.20.jar;E:\Work\cygwin\usr\local\hbase-0.94.20\lib\protobuf-java-2.4.0a.jar;E:\Work\cygwin\usr\local\hbase-0.94.20\lib\commons-io-2.1.jar;E:\Work\cygwin\usr\local\hbase-0.94.20\lib\commons-lang-2.5.jar;E:\Work\cygwin\usr\local\hbase-0.94.20\lib\commons-logging-1.1.1.jar;E:\Work\cygwin\usr\local\hbase-0.94.20\lib\commons-configuration-1.6.jar;E:\Work\cygwin\usr\local\hbase-0.94.20\lib\jackson-core-asl-1.8.8.jar;E:\Work\cygwin\usr\local\hbase-0.94.20\lib\jackson-jaxrs-1.8.8.jar;E:\Work\cygwin\usr\local\hbase-0.94.20\lib\jackson-mapper-asl-1.8.8.jar;E:\Work\cygwin\usr\local\hbase-0.94.20\lib\jackson-xc-1.8.8.jar;E:\Work\cygwin\usr\local\hbase-0.94.20\lib\log4j-1.2.16.jar;E:\Work\cygwin\usr\local\hbase-0.94.20\lib\slf4j-api-1.4.3.jar;E:\Work\cygwin\usr\local\hbase-0.94.20\lib\slf4j-log4j12-1.4.3.jar;E:\Work\cygwin\usr\local\hbase-0.94.20\lib\zookeeper-3.4.5.jar;E:\Work\cygwin\usr\local\hbase-0.94.20\lib\hadoop-core-1.0.4.jar

14/07/06 14:13:01 INFO zookeeper.ZooKeeper: Client environment:java.library.path=C:\Program Files\Java\jdk1.6.0_43\jre\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files/Java/jre7/bin/client;C:/Program Files/Java/jre7/bin;C:/Program Files/Java/jre7/lib/i386;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Common Files\Thunder Network\KanKan\Codecs;C:\Program Files\Common Files\Ulead Systems\MPEG;C:\Program Files\Java\jdk1.6.0_43\bin;C:\Program Files\IDM Computer Solutions\UltraEdit-32;C:\Program Files\IDM Computer Solutions\UltraEdit-32\;E:\Work\eclipse;;.

14/07/06 14:13:01 INFO zookeeper.ZooKeeper: Client environment:java.io.tmpdir=C:\Users\lenovo\AppData\Local\Temp\

14/07/06 14:13:01 INFO zookeeper.ZooKeeper: Client environment:java.compiler=<NA>

14/07/06 14:13:01 INFO zookeeper.ZooKeeper: Client environment:os.name=Windows 7

14/07/06 14:13:01 INFO zookeeper.ZooKeeper: Client environment:os.arch=x86

14/07/06 14:13:01 INFO zookeeper.ZooKeeper: Client environment:os.version=6.1

14/07/06 14:13:01 INFO zookeeper.ZooKeeper: Client environment:user.name=lenovo

14/07/06 14:13:01 INFO zookeeper.ZooKeeper: Client environment:user.home=C:\Users\lenovo

14/07/06 14:13:01 INFO zookeeper.ZooKeeper: Client environment:user.dir=E:\Work\workspace\hbase

14/07/06 14:13:01 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=127.0.0.1:2181 sessionTimeout=180000 watcher=hconnection

14/07/06 14:13:01 INFO zookeeper.RecoverableZooKeeper: The identifier of this process is 6436@lenovo-PC

14/07/06 14:13:01 INFO zookeeper.ClientCnxn: Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (无法定位登录配置)

14/07/06 14:13:01 INFO zookeeper.ClientCnxn: Socket connection established to 127.0.0.1/127.0.0.1:2181, initiating session

14/07/06 14:13:01 INFO zookeeper.ClientCnxn: Session establishment complete on server 127.0.0.1/127.0.0.1:2181, sessionid = 0x1470a3fadc20004, negotiated timeout = 180000

14/07/06 14:13:02 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=127.0.0.1:2181 sessionTimeout=180000 watcher=catalogtracker-on-org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@ba8602

14/07/06 14:13:02 INFO zookeeper.RecoverableZooKeeper: The identifier of this process is 6436@lenovo-PC

14/07/06 14:13:02 INFO zookeeper.ClientCnxn: Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (无法定位登录配置)

14/07/06 14:13:02 INFO zookeeper.ClientCnxn: Socket connection established to 127.0.0.1/127.0.0.1:2181, initiating session

14/07/06 14:13:02 INFO zookeeper.ClientCnxn: Session establishment complete on server 127.0.0.1/127.0.0.1:2181, sessionid = 0x1470a3fadc20005, negotiated timeout = 180000

14/07/06 14:13:02 INFO zookeeper.ZooKeeper: Session: 0x1470a3fadc20005 closed

Delete Table test success!

14/07/06 14:13:02 INFO zookeeper.ClientCnxn: EventThread shut down

14/07/06 14:13:02 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=127.0.0.1:2181 sessionTimeout=180000 watcher=catalogtracker-on-org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@ba8602

14/07/06 14:13:02 INFO zookeeper.RecoverableZooKeeper: The identifier of this process is 6436@lenovo-PC

14/07/06 14:13:02 INFO zookeeper.ClientCnxn: Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (无法定位登录配置)

14/07/06 14:13:02 INFO zookeeper.ClientCnxn: Socket connection established to 127.0.0.1/127.0.0.1:2181, initiating session

14/07/06 14:13:02 INFO zookeeper.ClientCnxn: Session establishment complete on server 127.0.0.1/127.0.0.1:2181, sessionid = 0x1470a3fadc20006, negotiated timeout = 180000

14/07/06 14:13:02 INFO zookeeper.ZooKeeper: Session: 0x1470a3fadc20006 closed

14/07/06 14:13:02 INFO zookeeper.ClientCnxn: EventThread shut down

14/07/06 14:13:03 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=127.0.0.1:2181 sessionTimeout=180000 watcher=catalogtracker-on-org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@ba8602

14/07/06 14:13:03 INFO zookeeper.RecoverableZooKeeper: The identifier of this process is 6436@lenovo-PC

14/07/06 14:13:03 INFO zookeeper.ClientCnxn: Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (无法定位登录配置)

14/07/06 14:13:03 INFO zookeeper.ClientCnxn: Socket connection established to 127.0.0.1/127.0.0.1:2181, initiating session

14/07/06 14:13:04 INFO zookeeper.ClientCnxn: Session establishment complete on server 127.0.0.1/127.0.0.1:2181, sessionid = 0x1470a3fadc20007, negotiated timeout = 180000

14/07/06 14:13:04 INFO zookeeper.ZooKeeper: Session: 0x1470a3fadc20007 closed

14/07/06 14:13:04 INFO zookeeper.ClientCnxn: EventThread shut down

test create successfully!

put 'row1', 'cf:column1', 'data1'

put 'row2', 'cf:column2', 'data2'

put 'row3', 'cf:column3', 'data3'

put 'row4', 'cf:column4', 'data4'

put 'row5', 'cf:column5', 'data5'

Get: keyvalues={row1/cf:column1/1404627184157/Put/vlen=5/ts=0}

Scan: keyvalues={row1/cf:column1/1404627184157/Put/vlen=5/ts=0}

Scan: keyvalues={row2/cf:column2/1404627184174/Put/vlen=5/ts=0}

Scan: keyvalues={row3/cf:column3/1404627184183/Put/vlen=5/ts=0}

Scan: keyvalues={row4/cf:column4/1404627184186/Put/vlen=5/ts=0}

Scan: keyvalues={row5/cf:column5/1404627184189/Put/vlen=5/ts=0}