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.獲取連接
* 2.獲取客戶端對象
* 3.操作數據庫
* 4.關閉連接
* 例:創建表myuser,兩個列族f1,f2
*/
@Test
public void createTable() throws IOException {
//創建連接
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);
//創建表
admin.createTable(hTableDescriptor);
//關閉連接
admin.close();
connection.close();
}
}
【HBase】創建表-Java API操作
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