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hbase 基本開發-插入表

AS 其中 jar 0.10 window spa ogr image sse

創建maven項目

pom.xml文件內容: 3個依賴包 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

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(主要用到裏面的zookeeper配置信息)

技術分享圖片

配置文件主要內容如下:

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();

}


}


配置不正確報錯(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


代碼裏設定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機子的主機名。原因未知。

否則報錯:

Exception in thread "main" org.apache.hadoop.hbase.MasterNotRunningException: org.apache.hadoop.hbase.MasterNotRunningException: java.net.UnknownHostException: can not resolve rhel,16000,1530027948780



hbase 基本開發-插入表