创建maven项目
创新互联是一家专业提供永胜企业网站建设,专注与成都做网站、成都网站制作、成都外贸网站建设、HTML5、小程序制作等业务。10年已为永胜众多企业、政府机构等服务。创新互联专业网站设计公司优惠进行中。
pom.xml文件内容: 3个依赖包 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>
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
<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
分享题目:hbase基本开发-插入表
网站URL:https://www.cdcxhl.com/article6/ihesog.html
成都网站建设公司_创新互联,为您提供搜索引擎优化、标签优化、品牌网站建设、小程序开发、网站收录、网站设计公司
声明:本网站发布的内容(图片、视频和文字)以用户投稿、用户转载内容为主,如果涉及侵权请尽快告知,我们将会在第一时间删除。文章观点不代表本网站立场,如需处理请联系客服。电话:028-86922220;邮箱:631063699@qq.com。内容未经允许不得转载,或转载时需注明来源: 创新互联