Java连接hbase获取数据-优快云博客

本文链接：https://blog.youkuaiyun.com/chengbai121444/article/details/87915654

本文介绍了如何使用Java代码实现连接并从两个不同的HBase集群中获取数据。通过配置文件加载，集群连接类和数据获取类的详细步骤，展示了完整的操作流程。

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以下代码是同一个服务连接两个不同的hbase集群获取数据

1、pom文件

<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>test</groupId>
	<artifactId>test</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>test</name>
	<url>http://maven.apache.org</url>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>

	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>org.apache.hadoop</groupId>
			<artifactId>hadoop-common</artifactId>
			<version>2.6.0</version>
		</dependency>

		<dependency>
			<groupId>org.apache.hadoop</groupId>
			<artifactId>hadoop-auth</artifactId>
			<version>2.6.0</version>
		</dependency>


		<dependency>
			<groupId>org.apache.hbase</groupId>
			<artifactId>hbase-client</artifactId>
			<version>1.3.1</version>
		</dependency>
		<dependency>
			<groupId>org.apache.hbase</groupId>
			<artifactId>hbase-common</artifactId>
			<version>1.3.1</version>
		</dependency>
		<dependency>
			<groupId>org.apache.hbase</groupId>
			<artifactId>hbase-protocol</artifactId>
			<version>1.3.1</version>
		</dependency>
		
		
	</dependencies>
	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
				<version>2.0.0.RELEASE</version>
			</plugin>
		</plugins>
	</build>
</project>

2、集群配置文件加载类

package hbase;

import java.util.HashMap;
import java.util.Map;

public class HBaseDaoHolder {

	private static volatile HBaseDao BDSE_HBASEDAO = null;

	private static volatile HBaseDao BDCSC_HBASEDAO = null;




	public static void initAllHbase() {
		initBdse();
		initBdcsc();
	}

	/**
	 * 初始化CDH版Hbase
	 */
	private static void initBdse() {
		// 创建hbasedao
		Map<String, String> hbaseConf = new HashMap<String, String>();
		String ip = "10.161.1.29,10.161.1.30,10.161.1.31";
		hbaseConf.put("hbase.zookeeper.property.maxclientcnxns", "300");
		hbaseConf.put("hbase.ipc.client.socket.timeout.connect", "1000");
		hbaseConf.put("zookeeper.session.timeout", "500");
		hbaseConf.put("hbase.regionserver.handler.count", "500");
		hbaseConf.put("hadoop.security.authentication", "kerberos");
		hbaseConf.put("hbase.master.kerberos.principal", "hbase/_HOST@KFPT.CTC.LOCAL");
		hb