創(chuàng)建maven項(xiàng)目
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pom.xml文件內(nèi)容: 3個(gè)依賴包 hbase-client hadoop-hdfs jdk.tools
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>mjj.hbase</groupId>
<artifactId>test-10</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-client</artifactId>
<version>2.0.0</version>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-hdfs</artifactId>
<version>2.8.0</version>
</dependency>
<dependency>
<groupId>jdk.tools</groupId>
<artifactId>jdk.tools</artifactId>
<version>1.8</version>
<scope>system</scope>
<systemPath>C:\Program Files\Java\jdk1.8.0_151\lib\tools.jar</systemPath>
</dependency>
</dependencies>
</project>
連接hbase的兩種方法:
配置法(不一定要按圖配置,程序會(huì)默認(rèn)去讀classpath下的配置文件,可以通過System.out.println(ClassLoader.getSystemResource("").toString());獲?。?/p>
1 在main文件夾下,建立resources文件夾,在resources文件夾下建立hbase文件,hbase文件夾下放hbase-site.xml配置文件(主要用到里面的zookeeper配置信息)
配置文件主要內(nèi)容如下:
hbase-site.xml
<property>
<name>hbase.zookeeper.quorum</name>
<value>192.168.50.1071</value>
</property>
<property>
<name>hbase.zookeeper.property.clientPort</name>
<value>2181</value>
</property>
代碼:
package myHbase;
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.Cell.Type;
import org.apache.hadoop.hbase.CellBuilder;
import org.apache.hadoop.hbase.CellBuilderFactory;
import org.apache.hadoop.hbase.CellBuilderType;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.util.Bytes;
public class SimpleTest {
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
Configuration hBaseConfig = HBaseConfiguration.create();
HBaseAdmin.available(hBaseConfig);
Connection connection = ConnectionFactory.createConnection(hBaseConfig);
TableName table1 = TableName.valueOf("test");
Table table = connection.getTable(table1);
CellBuilder cb = CellBuilderFactory.create(CellBuilderType.SHALLOW_COPY);
cb.setRow(Bytes.toBytes("row3"));
cb.setFamily(Bytes.toBytes("cf"));
cb.setQualifier("qualifier1".getBytes());
cb.setValue(Bytes.toBytes("mjj2"));
cb.setType(Type.Put);
Cell cell = cb.build();
Put p = new Put(Bytes.toBytes("row3"));
p.add(cell);
table.put(p);
connection.close();
}
}
配置不正確報(bào)錯(cuò)(zookeeper的連接丟失):
Exception in thread "main" org.apache.hadoop.hbase.MasterNotRunningException: org.apache.hadoop.hbase.MasterNotRunningException: java.io.IOException: org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hbase/master
代碼里設(shè)定zookeeper:
package myHbase;
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.Cell.Type;
import org.apache.hadoop.hbase.CellBuilder;
import org.apache.hadoop.hbase.CellBuilderFactory;
import org.apache.hadoop.hbase.CellBuilderType;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.util.Bytes;
public class SimpleTest {
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
Configuration hBaseConfig = HBaseConfiguration.create();
hBaseConfig.set("hbase.zookeeper.quorum", "192.168.50.107");
hBaseConfig.set("hbase.zookeeper.property.clientPort", "2181");
HBaseAdmin.available(hBaseConfig);
Connection connection = ConnectionFactory.createConnection(hBaseConfig);
TableName table1 = TableName.valueOf("test");
Table table = connection.getTable(table1);
CellBuilder cb = CellBuilderFactory.create(CellBuilderType.SHALLOW_COPY);
cb.setRow(Bytes.toBytes("row3"));
cb.setFamily(Bytes.toBytes("cf"));
cb.setQualifier("qualifier1".getBytes());
cb.setValue(Bytes.toBytes("mjj2"));
cb.setType(Type.Put);
Cell cell = cb.build();
Put p = new Put(Bytes.toBytes("row3"));
p.add(cell);
table.put(p);
connection.close();
}
}
重要: windows上一定要配置/etc/hosts. 添加一條 192.168.50.107 rhel -------其中rhel 為 hbase機(jī)子的主機(jī)名。原因未知。
否則報(bào)錯(cuò):
Exception in thread "main" org.apache.hadoop.hbase.MasterNotRunningException: org.apache.hadoop.hbase.MasterNotRunningException: java.net.UnknownHostException: can not resolve rhel,16000,1530027948780
分享題目:hbase基本開發(fā)-插入表
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