HBaseClient的表操作java实现create put get delete

飞熊 • 2023年4月26日上午11:02 • 后端笔记 • 阅读 192

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.client.Get;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.util.Bytes;


public class HBaseClient {
	
	public static void main(String[] args) throws Exception{
		create();
		insert();
		get();
		delete();
	}
	
	public static void create() throws Exception {
		Configuration configuration = HBaseConfiguration.create();
		Connection connection = ConnectionFactory.createConnection(configuration);
		String tableName = "test-hbase";
		String columnName = "info";
		Admin admin = connection.getAdmin();
		HTableDescriptor tableDescriptor = new HTableDescriptor(TableName.valueOf(tableName));

		HColumnDescriptor columnDescriptor = new HColumnDescriptor(columnName);
		tableDescriptor.addFamily(columnDescriptor);

//		admin.addColumn(TableName.valueOf(tableName), columnDescriptor);
		admin.createTable(tableDescriptor);

		admin.close();
		connection.close();
	}
	

	
	public static void insert() throws Exception{
		Configuration configuration = HBaseConfiguration.create();
		Connection connection = ConnectionFactory.createConnection(configuration);
		String tableName = "test-hbase";
		String columnName = "info";
		String rowKey = "rk1";
		String qulifier = "c1";
		String value = "value1";
		
		Table table = connection.getTable(TableName.valueOf(tableName));
		Put put = new Put(rowKey.getBytes());
		put.addColumn(columnName.getBytes(), qulifier.getBytes(), value.getBytes());
		table.put(put);
		table.close();
		connection.close();
		
	}
	
	public static void get() throws Exception{
		Configuration configuration = HBaseConfiguration.create();
		Connection connection = ConnectionFactory.createConnection(configuration);
		String tableName = "test-hbase";
		String columnName = "info";
		String rowKey = "rk1";
		String qualifier = "c1";
		String value = "value1";
		
		Table table = connection.getTable(TableName.valueOf(tableName));
		Get get = new Get(rowKey.getBytes());
		get.addColumn(columnName.getBytes(), qualifier.getBytes());
		Result result = table.get(get);
		String valueStr = Bytes.toString(result.getValue(columnName.getBytes(), qualifier.getBytes()));
		System.out.println(valueStr);
		table.close();
		connection.close();
	}
	
	
	public static void delete() throws Exception{
		Configuration configuration = HBaseConfiguration.create();
		Connection connection = ConnectionFactory.createConnection(configuration);
		String tableName = "test-hbase";
		
		Admin admin = connection.getAdmin();
		admin.disableTable(TableName.valueOf(tableName));
		admin.deleteTable(TableName.valueOf(tableName));
		admin.close();
		connection.close();
		
	}
}
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HBaseClient的表操作java实现create put get delete

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