04使用api删除 修改 表

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.TableName;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.regionserver.BloomType;
import org.junit.Before;
import org.junit.Test;

public class DropAlter {
	
	Connection conn = null;
	@Before
	public void getConn() throws Exception {
		Configuration conf = HBaseConfiguration.create();
		conf.set("hbase.zookeeper.quorum", "hadoop1:2181,hadoop2:2181:hadoop3:2181");
		conn = ConnectionFactory.createConnection(conf);
	}
	
	@Test
	public void testDrop() throws Exception {
		Admin admin = conn.getAdmin();
		//如果要删除表，必须先将其停用
		admin.disableTable(TableName.valueOf("APItest"));
		admin.deleteTable(TableName.valueOf("APItest"));
		//关闭资源
		admin.close();
		conn.close();
	}
	
	//修改表定义--添加一个列族
	@Test
	public void testAlter() throws Exception {
		Admin admin = conn.getAdmin();
		//取出旧的表定义信息
		HTableDescriptor tableDescriptor = admin.getTableDescriptor(TableName.valueOf("user_info"));
		//新构造一个列族定义
		HColumnDescriptor hColumnDescriptor = new HColumnDescriptor("othre");
		hColumnDescriptor.setBloomFilterType(BloomType.ROWCOL);    //设置改列族的布隆过滤器类型
		//将列族定义信息添加到表对象中
		tableDescriptor.addFamily(hColumnDescriptor);
		//将修改过的表定义交给admin去提交
		admin.modifyTable(TableName.valueOf("user_info"), tableDescriptor);
		admin.close();
		conn.close();
	}
	
}