HBase JAVA API环境配置

<!-- https://mvnrepository.com/artifact/org.apache.hbase/hbase-client -->
<dependency>
    <groupId>org.apache.hbase</groupId>
    <artifactId>hbase-client</artifactId>
    <version>1.4.6</version>
</dependency>

package com.shujia;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;

import java.io.IOException;

public class Demo01TestHBaseConn {
    public static void main(String[] args) throws IOException {
        //创建HBase的配置
        Configuration conf = HBaseConfiguration.create();
        //配置HBase所属ZK集群的地址
        conf.set("hbase.zookeeper.quorum","master:2181,node1:2181,node2:2181");

        //建立连接
        Connection conn = ConnectionFactory.createConnection(conf);
        /*
        HBase的操作分类：
        1.对表结构（元数据）的操作-->Admin对象
        2.对表数据的操作-->Table对象
         */

        //获取所有表的名字,这个操作跟表的数据无关
        Admin admin = conn.getAdmin();
        //HBase中的表名都以TableName对象形式存在
        TableName[] tableNames = admin.listTableNames();
//        TableName tb2 = TableName.valueOf("tb2");
        for (TableName tableName : tableNames) {
            System.out.println(tableName.getNameAsString());
        }

        //关闭连接
        admin.close();
        conn.close();
    }
}

ns1:tb3
tb1_tt1
tb1_v
tb2
tb4

package com.shujia;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.io.IOException;
/*
   HBase的操作分类：
   1.对表结构（元数据）的操作-->Admin对象
   2.对表数据的操作-->Table对象
*/
public class Demo02HBaseJavaAPI {
    Connection conn;
    Admin admin;

    @Before
    public void init() throws IOException {
        //创建HBase的配置
        Configuration conf = HBaseConfiguration.create();
        //配置HBase所属ZK集群的地址
        conf.set("hbase.zookeeper.quorum","master:2181,node1:2181,node2:2181");

        //建立连接
        conn = ConnectionFactory.createConnection(conf);
        //获取所有表的名字,这个操作跟表的数据无关
        admin= conn.getAdmin();
    }

    @Test
    //list 查看所有表
    public void listAllTables() throws IOException {
        //HBase中的表名都以TableName对象形式存在
        TableName[] tableNames = admin.listTableNames();
        for (TableName tableName : tableNames) {
            System.out.println(tableName.getNameAsString());
        }
    }

    @After
    public void close() throws IOException {
        //关闭连接
        admin.close();
        conn.close();
    }
}

ns1:tb3
tb1_tt1
tb1_v
tb2
tb4