ubuntu14.04,eclipse下操作hbase。下面是一个利用hbase java api操作hbase,查看hbase中表student1列族情况的example:
import java.io.IOException; 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.client.HBaseAdmin; import org.apache.hadoop.hbase.util.Bytes; public class OperateTable { public static void main(String[] args) throws IOException { Configuration conf = HBaseConfiguration.create(); conf.set("hbase.zookeeper.quorum", "localhost");//使用eclipse时必须添加这个,否则无法定位.后一个参数写地址,我这里是伪分布的,所以为localhost conf.set("hbase.zookeeper.property.clientPort", "2181"); HBaseAdmin admin = new HBaseAdmin(conf);// 新建一个数据库管理员 HTableDescriptor tableDescriptor = admin.getTableDescriptor(Bytes.toBytes("student1")); byte[] name = tableDescriptor.getName(); System.out.println("result:"); System.out.println("table name: "+ new String(name)); HColumnDescriptor[] columnFamilies = tableDescriptor .getColumnFamilies(); for(HColumnDescriptor d : columnFamilies){ System.out.println("column Families: "+ d.getNameAsString()); } } }
时间: 2024-10-13 06:03:34