hbase基本开发-插入表-创新互联

创建maven项目

pom.xml文件内容: 3个依赖包 hbase-client hadoop-hdfs jdk.tools

 4.0.0

 mjj.hbase

 test-10

 0.0.1-SNAPSHOT

      org.apache.hbase

      hbase-client

      2.0.0

      org.apache.hadoop

      hadoop-hdfs

      2.8.0

      jdk.tools

      jdk.tools

      1.8

      system

      C:\Program Files\Java\jdk1.8.0_151\lib\tools.jar

连接hbase的两种方法:

配置法（不一定要按图配置，程序会默认去读classpath下的配置文件，可以通过System.out.println(ClassLoader.getSystemResource("").toString());获取）

1 在main文件夹下，建立resources文件夹，在resources文件夹下建立hbase文件，hbase文件夹下放hbase-site.xml配置文件(主要用到里面的zookeeper配置信息)

配置文件主要内容如下:

hbase-site.xml

 hbase.zookeeper.quorum

 192.168.50.1071

 hbase.zookeeper.property.clientPort

 2181

代码:

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();

}

}

配置不正确报错（zookeeper的连接丢失）:

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

代码里设定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. 添加一条 192.168.50.107 rhel -------其中rhel 为 hbase机子的主机名。原因未知。

否则报错:

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

另外有需要云服务器可以了解下创新互联scvps.cn，海内外云服务器15元起步，三天无理由+7*72小时售后在线，公司持有idc许可证，提供“云服务器、裸金属服务器、高防服务器、香港服务器、美国服务器、虚拟主机、免备案服务器”等云主机租用服务以及企业上云的综合解决方案，具有“安全稳定、简单易用、服务可用性高、性价比高”等特点与优势，专为企业上云打造定制，能够满足用户丰富、多元化的应用场景需求。