HBase API实例操作，附代码

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概述

1. HBASE连接及创建表

1.1代码

描述：

建立连接
实例化HBaseAdmin
创建TableDescriptor
创建列族
使用HBaseAdmin类的createTable()方法创建表

package com.hbase;

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.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.client.HBaseAdmin;

public class HbaseSample {
	public static Configuration conf;
	public static HBaseAdmin admin;
	public static Connection connection;
	static {
		//使用HBaseConfiguration的单例方法实例化
		conf=HBaseConfiguration.create();
		conf.set("hbase.zookeeper.quorum", "hadoop101");
		conf.set("hbase.zookeeper.property.clientPort", "2181");
	}
	public static void createTable(String tableName,String ...columnFamily) throws IOException {
		connection=ConnectionFactory.createConnection(conf);
		//实例化HBaseAdmin
		admin=(HBaseAdmin) connection.getAdmin();
		if(admin.tableExists(tableName)) {
			System.out.println(tableName+"已存在");
		}else {
			//创建TableDescriptor
			HTableDescriptor descriptor=new HTableDescriptor(TableName.valueOf(tableName));
			//创建列族
			for(String cf:columnFamily) {
				descriptor.addFamily(new HColumnDescriptor(cf));
			}
			//使用HBaseAdmin类的createTable()方法，创建表
			admin.createTable(descriptor);
			admin.close();
			connection.close();
		}
	}
}

1.2测试

描述：创建sample表，列族info1,info2

	public static void main(String[] args) throws IOException {
		//1、创建sample表，列族info1,info2
		HbaseSample hs=new HbaseSample();
		hs.createTable("sample", "info1","info2");
	}

1.3 测试结果

描述：通过hbase shell 使用 describe 命令查看

hbase(main):029:0> describe "sample"
Table sample is ENABLED                                                         
sample                                                                          
COLUMN FAMILIES DESCRIPTION                                                     
{NAME => 'info1', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', K
EEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'NONE', TTL => 'FOREVER', C
OMPRESSION => 'NONE', MIN_VERSIONS => '0', BLOCKCACHE => 'true', BLOCKSIZE => '6
5536', REPLICATION_SCOPE => '0'}                                                
{NAME => 'info2', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', K
EEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'NONE', TTL => 'FOREVER', C
OMPRESSION => 'NONE', MIN_VERSIONS => '0', BLOCKCACHE => 'true', BLOCKSIZE => '6
5536', REPLICATION_SCOPE => '0'}                                                
2 row(s) in 0.0530 seconds

2. 插入数据

public class HbaseSample {
	
	public static void addData(String tableName,String rowkey,String columnFamliy,
			String column,String value) throws IOException {
		connection=ConnectionFactory.createConnection(conf);
		admin=(HBaseAdmin) connection.getAdmin();
		//1、获取Table
		Table table=connection.getTable(TableName.valueOf(tableName));
		//2、创建put对象，插入数据
		Put put=new Put(Bytes.toBytes(rowkey));
		put.addColumn(Bytes.toBytes(columnFamliy), Bytes.toBytes(column),
				Bytes.toBytes(value));
		//3 保存数据
		table.put(put);
		//4 关闭连接
		table.close();
		admin.close();
		connection.close();
	}
}

2.2测试

	public static void main(String[] args) throws IOException {
		
		HbaseSample hs=new HbaseSample();
		//1、创建sample表，列族info1,info2
//		hs.createTable("sample", "info1","info2");
		//2 插入数据
		hs.addData("sample", "001", "info1", "name", "Kate");
		hs.addData("sample", "001", "info1", "sex", "Female");
		hs.addData("sample", "001", "info2", "name", "Micle");
		hs.addData("sample", "001", "info2", "sex", "Male");
	}

2.3测试结果

hbase(main):035:0> scan "sample"
ROW                   COLUMN+CELL                                               
 001                  column=info1:name, timestamp=1593603805436, value=Kate    
 001                  column=info1:sex, timestamp=1593603805558, value=Female   
 001                  column=info2:name, timestamp=1593603805624, value=Micle   
 001                  column=info2:sex, timestamp=1593603805682, value=Male     
1 row(s) in 0.0270 seconds

3. 查询数据

3.1代码

	public static void getData(String tableName,String rowkey) throws IOException {
		connection=ConnectionFactory.createConnection(conf);
		//1 Table对象
		Table table=connection.getTable(TableName.valueOf(tableName));
		
		//2 创建get对象
		 Get get=new Get(Bytes.toBytes(rowkey));		 
		
		 //3 获取数据
		 Result result=table.get(get);
		 for(Cell cell:result.rawCells()) {
			 System.out.println("列族："+Bytes.toString(CellUtil.cloneFamily(cell)));
			 System.out.println("列名"+Bytes.toString(CellUtil.cloneQualifier(cell)));
			 System.out.println("值"+Bytes.toString(CellUtil.cloneValue(cell)));
			 System.out.println("+++++++++++++++++++++++++++++++++++++===");

		 }
		 table.close();
		 connection.close();
	}

3.2测试

//3查询数据
	public static void main(String[] args) throws IOException {
		
		HbaseSample hs=new HbaseSample();
		//1、创建sample表，列族info1,info2
//		hs.createTable("sample", "info1","info2");
		//2 插入数据
//		hs.addData("sample", "001", "info1", "name", "Kate");
//		hs.addData("sample", "001", "info1", "sex", "Female");
//		hs.addData("sample", "001", "info2", "name", "Micle");
//		hs.addData("sample", "001", "info2", "sex", "Male");
		
		//3查询数据
		hs.getData("sample", "001");
	}

3.3测试结果

2020-07-01 20:18:55,722 INFO [org.apache.zookeeper.ClientCnxn] 
列族：info1
列名name
值Kate
+++++++++++++++++++++++++++++++++++++===
列族：info1
列名sex
值Female
+++++++++++++++++++++++++++++++++++++===
列族：info2
列名name
值Micle
+++++++++++++++++++++++++++++++++++++===
列族：info2
列名sex
值Male
+++++++++++++++++++++++++++++++++++++===

4. 删除数据

4.1代码

	public static void deleteData(String tableName,String rowkey) throws IOException{
		connection=ConnectionFactory.createConnection(conf);
		//1 Table
		Table table=connection.getTable(TableName.valueOf(tableName));
		
		//2 Delete
		Delete delete=new Delete(Bytes.toBytes(rowkey));
		
		//3 删除数据
		table.delete(delete);
		
		//4关闭资源
		table.close();
		connection.close();
		
	}

4.2测试

	public static void main(String[] args) throws IOException {
		
		HbaseSample hs=new HbaseSample();
		//1、创建sample表，列族info1,info2
//		hs.createTable("sample", "info1","info2");
		//2 插入数据
//		hs.addData("sample", "002", "info1", "name", "Kate");
//		hs.addData("sample", "002", "info1", "sex", "Female");
//		hs.addData("sample", "003", "info2", "name", "Micle");
//		hs.addData("sample", "003", "info2", "sex", "Male");
		
		//3查询数据
//		hs.getData("sample", "001");
		
		//4 删除数据
		hs.deleteData("sample", "001");
	}

4.3测试结果

hbase(main):038:0> get 'sample','001'
COLUMN                CELL                                                      
0 row(s) in 0.0310 seconds

hbase(main):039:0> scan 'sample'
ROW                   COLUMN+CELL                                               
 002                  column=info1:name, timestamp=1593605901102, value=Kate    
 002                  column=info1:sex, timestamp=1593605901160, value=Female   
 003                  column=info2:name, timestamp=1593605901249, value=Micle   
 003                  column=info2:sex, timestamp=1593605901322, value=Male     
2 row(s) in 0.0380 seconds

5全部代码

package com.hbase;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellUtil;
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.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.HBaseAdmin;
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 HbaseSample {
	public static Configuration conf;
	public static HBaseAdmin admin;
	public static Connection connection;
	static {
		//使用HBaseConfiguration的单例方法实例化
		conf=HBaseConfiguration.create();
		conf.set("hbase.zookeeper.quorum", "hadoop101");
		conf.set("hbase.zookeeper.property.clientPort", "2181");
	}
	
	public static void createTable(String tableName,String ...columnFamily) throws IOException {
		connection=ConnectionFactory.createConnection(conf);
		//实例化HBaseAdmin
		admin=(HBaseAdmin) connection.getAdmin();
		if(admin.tableExists(tableName)) {
			System.out.println(tableName+"已存在");
		}else {
			//创建TableDescriptor
			HTableDescriptor descriptor=new HTableDescriptor(TableName.valueOf(tableName));
			//创建列族
			for(String cf:columnFamily) {
				descriptor.addFamily(new HColumnDescriptor(cf));
			}
			//使用HBaseAdmin类的createTable()方法，创建表
			admin.createTable(descriptor);
			admin.close();
			connection.close();
		}
	}
	
	public static void addData(String tableName,String rowkey,String columnFamliy,
			String column,String value) throws IOException {
		connection=ConnectionFactory.createConnection(conf);
		//1、获取Table
		Table table=connection.getTable(TableName.valueOf(tableName));
		//2、创建put对象，插入数据
		Put put=new Put(Bytes.toBytes(rowkey));
		put.addColumn(Bytes.toBytes(columnFamliy), Bytes.toBytes(column),
				Bytes.toBytes(value));
		//3 保存数据
		table.put(put);
		//4 关闭连接
		table.close();
		connection.close();
	}
	
	public static void getData(String tableName,String rowkey) throws IOException {
		connection=ConnectionFactory.createConnection(conf);
		//1 Table对象
		Table table=connection.getTable(TableName.valueOf(tableName));
		
		//2 创建get对象
		 Get get=new Get(Bytes.toBytes(rowkey));		 
		
		 //3 获取数据
		 Result result=table.get(get);
		 for(Cell cell:result.rawCells()) {
			 System.out.println("列族："+Bytes.toString(CellUtil.cloneFamily(cell)));
			 System.out.println("列名"+Bytes.toString(CellUtil.cloneQualifier(cell)));
			 System.out.println("值"+Bytes.toString(CellUtil.cloneValue(cell)));
			 System.out.println("+++++++++++++++++++++++++++++++++++++===");

		 }
		 table.close();
		 connection.close();
	}
	
	public static void deleteData(String tableName,String rowkey) throws IOException{
		connection=ConnectionFactory.createConnection(conf);
		//1 Table
		Table table=connection.getTable(TableName.valueOf(tableName));
		
		//2 Delete
		Delete delete=new Delete(Bytes.toBytes(rowkey));
		
		//3 删除数据
		table.delete(delete);
		
		//4关闭资源
		table.close();
		connection.close();
		
	}
	
	
	public static void main(String[] args) throws IOException {
		
		HbaseSample hs=new HbaseSample();
		//1、创建sample表，列族info1,info2
//		hs.createTable("sample", "info1","info2");
		//2 插入数据
//		hs.addData("sample", "002", "info1", "name", "Kate");
//		hs.addData("sample", "002", "info1", "sex", "Female");
//		hs.addData("sample", "003", "info2", "name", "Micle");
//		hs.addData("sample", "003", "info2", "sex", "Male");
		
		//3查询数据
//		hs.getData("sample", "001");
		
		//4 删除数据
		hs.deleteData("sample", "001");
	}
}

最后

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本文分类：大数据
浏览次数：72 次浏览
发布日期：2024-01-05 04:31:09
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HBase API实例操作，附代码

概述

1. HBASE连接及创建表

1.1代码

1.2测试

1.3 测试结果

2. 插入数据

2.2测试

2.3测试结果

3. 查询数据

3.1代码

3.2测试

3.3测试结果

4. 删除数据

4.1代码

4.2测试

4.3测试结果

5全部代码

最后

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HBase API实例操作，附代码

概述

1. HBASE连接及创建表

1.1代码

1.2测试

1.3 测试结果

2. 插入数据

2.2测试

2.3测试结果

3. 查询数据

3.1代码

3.2测试

3.3测试结果

4. 删除数据

4.1代码

4.2测试

4.3测试结果

5全部代码

最后

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