【HBase】创建表-Java API操作

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HTableDescriptor;
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.Test;
import java.io.IOException;

public class HbaseOperater {
    /**
     * 1.获取连接
     * 2.获取客户端对象
     * 3.操作数据库
     * 4.关闭连接
     * 例：创建表myuser，两个列族f1，f2
     */
    @Test
    public void createTable() throws IOException {
        //创建连接
        Configuration configuration = HBaseConfiguration.create();
        configuration.set("hbase.zookeeper.quorum", "node01:2181,node02:2181,node03:2181");
        Connection connection = ConnectionFactory.createConnection(configuration);
        //ddl操作需用admin
        Admin admin = connection.getAdmin();
        //指定表名
        TableName myuser = TableName.valueOf("myuser");
        //添加列族
        HTableDescriptor hTableDescriptor = new HTableDescriptor(myuser);
        HColumnDescriptor f1 = new HColumnDescriptor("f1");
        HColumnDescriptor f2 = new HColumnDescriptor("f2");
        hTableDescriptor.addFamily(f1);
        hTableDescriptor.addFamily(f2);
        //创建表
        admin.createTable(hTableDescriptor);
        //关闭连接
        admin.close();
        connection.close();
    }
}