大数据平台技术实验三---HBase分布式数据库操作与编程

其他 2020-05-15 10:50:34 阅读次数: 0

HBase分布式数据库操作与编程


实验目的：
1.掌握HBase操作常用Shell命令；
2.掌握HBase数据表的创建、添加数据、查看数据、删除数据、删除表、查询历史数据等操作；
3.掌握HBase APIs编程实践方法
实验环境：
Linux操作系统环境，VirtualBox虚拟机，Java开发环境，Hadoop等程序。

1.HBase 配置并完成javac程序练习

这里直接参考下面网站进行
参考地址

2.HBase Shell数据库表创建

根据以下关系型数据库表，使用HBase Shell设计并创建适宜的HBase数据表。
在这里插入图片描述
打开终端启动Hbase：

cd /usr/local/hadoop
./sbin/start-dfs.sh
cd /usr/local/hbase
./bin/start-hbase.sh

bin/hbase shell

学生Student表

create 'Student','S_No','S_Name','S_Sex','S_Age'
put 'Student','s001','S_No','2015001'
put 'Student','s001','S_Name','Zhangsan'
put 'Student','s001','S_Sex','male'
put 'Student','s001','S_Age','23'

在这里插入图片描述
同样的创建表的第二行、第三行

put 'Student','s002','S_No','2015002'
put 'Student','s002','S_Name','Mary'
put 'Student','s002','S_Sex','female'
put 'Student','s002','S_Age','22'
put 'Student','s003','S_No','2015003'
put 'Student','s003','S_Name','Lisi'
put 'Student','s003','S_Sex','male'
put 'Student','s003','S_Age','24'

课程Course表

create 'Course','C_No','C_Name','C_Credit'
put 'Course','c001','C_No','123001'
put 'Course','c001','C_Name','Math'
put 'Course','c001','C_Credit','2.0'
put 'Course','c002','C_No','123002'
put 'Course','c002','C_Name','Computer'
put 'Course','c002','C_Credit','5.0'
put 'Course','c003','C_No','123003'
put 'Course','c003','C_Name','English'
put 'Course','c003','C_Credit','3.0'

选课表

create 'SC','SC_Sno','SC_Cno','SC_Score'
put 'SC','sc001','SC_Sno','2015001'
put 'SC','sc001','SC_Cno','123001'
put 'SC','sc001','SC_Score','86'
put 'SC','sc002','SC_Sno','2015001'
put 'SC','sc002','SC_Cno','123003'
put 'SC','sc002','SC_Score','69'
put 'SC','sc003','SC_Sno','2015002'
put 'SC','sc003','SC_Cno','123002'
put 'SC','sc003','SC_Score','77'
put 'SC','sc004','SC_Sno','2015002'
put 'SC','sc004','SC_Cno','123003'
put 'SC','sc004','SC_Score','99'
put 'SC','sc005','SC_Sno','2015003'
put 'SC','sc005','SC_Cno','123001'
put 'SC','sc005','SC_Score','98'
put 'SC','sc006','SC_Sno','2015003'
put 'SC','sc006','SC_Cno','123002'
put 'SC','sc006','SC_Score','95'

在这里插入图片描述

3.HBase Shell数据访问操作

(1)使用HBase Shell命令向第1题所构建的HBase数据表中添加适宜数据；
(2)使用HBase Shell命令从第1题所构建的HBase数据表中查询出数据；
(3)使用HBase Shell命令从第1题所构建的HBase数据表中删除任一数据；
(4)使用HBase Shell命令统计第1题所构建的HBase数据表的行数。

使用HBase Shell命令向第1题所构建的HBase数据表中添加适宜数据

put 'Course','c004','C_No','123004'
put 'Course','c004','C_Name','Chinese'
put 'Course','c004','C_Credit','3.0'

在这里插入图片描述
使用HBase Shell命令从第1题所构建的HBase数据表中查询出数据

scan 'Course'

在这里插入图片描述
使用HBase Shell命令从第1题所构建的HBase数据表中删除任一数据

delete 'Course','c004','C_Credit'
scan 'Course'

在这里插入图片描述使用HBase Shell命令统计第1题所构建的HBase数据表的行数

count 'Course'
count 'Student'
count 'SC'

在这里插入图片描述

4.HBase Java API编程

(1)createTable(String tableName, String[] fields)
创建表，参数tableName为表的名称，字符串数组fields为存储记录各个域名称的数组。要求当HBase已经存在名为tableName的表的时候，先删除原有的表，然后再创建新的表。
(2)addRecord(String tableName, String row, String[] fields, String[] values)
向表tableName、行row（用S_Name表示）和字符串数组files指定的单元格中添加对应的数据values。其中fields中每个元素如果对应的列族下还有相应的列限定符的话，用“columnFamily:column”表示。例如，同时向“Math”、“Computer Science”、“English”三列添加成绩时，字符串数组fields为{“Score:Math”,”Score；Computer Science”,”Score:English”}，数组values存储这三门课的成绩。
(3)scanColumn(String tableName, String column)
浏览表tableName某一列的数据，如果某一行记录中该列数据不存在，则返回null。要求当参数column为某一列族名称时，如果底下有若干个列限定符，则要列出每个列限定符代表的列的数据；当参数column为某一列具体名称（例如“Score:Math”）时，只需要列出该列的数据。
(4)modifyData(String tableName, String row, String column)
修改表tableName，行row（可以用学生姓名S_Name表示），列column指定的单元格的数据。
(5)deleteRow(String tableName, String row)
删除表tableName中row指定的行的记录。

（1）.createTable(String tableName, String[] fields)

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 java.io.IOException;

public class CreateTable {
    public static Configuration configuration;
    public static Connection connection;
    public static Admin admin;

    public static void createTable(String tableName, String[] fields) throws IOException {
        init();
        TableName tablename = TableName.valueOf(tableName);
        if (admin.tableExists(tablename)) {
            System.out.println("table is exists!");
            admin.disableTable(tablename);
            admin.deleteTable(tablename);
        }
        HTableDescriptor hTableDescriptor = new HTableDescriptor(tablename);
        for (String str : fields) {
            HColumnDescriptor hColumnDescriptor = new HColumnDescriptor(str);
            hTableDescriptor.addFamily(hColumnDescriptor);
        }
        admin.createTable(hTableDescriptor);
        close();
    }

    public static void init() {
        configuration = HBaseConfiguration.create();
        configuration.set("hbase.rootdir", "hdfs://localhost:9000/hbase");
        try {
            connection = ConnectionFactory.createConnection(configuration);
            admin = connection.getAdmin();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void close() {
        try {
            if (admin != null) {
                admin.close();
            }
            if (null != connection) {
                connection.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        String[] fields = {"Score"};
        try {
            createTable("person", fields);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

在这里插入图片描述

（2）.addRecord(String tableName, String row, String[] fields, String[] values)

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.*;

import java.io.IOException;

public class AddRecord {
    public static Configuration configuration;
    public static Connection connection;
    public static Admin admin;

    public static void addRecord(String tableName, String row, String[] fields, String[] values) throws IOException {
        init();
        Table table = connection.getTable(TableName.valueOf(tableName));
        for (int i = 0; i != fields.length; i++) {
            Put put = new Put(row.getBytes());
            String[] cols = fields[i].split(":");
            put.addColumn(cols[0].getBytes(), cols[1].getBytes(), values[i].getBytes());
            table.put(put);
        }
        table.close();
        close();
    }

    public static void init() {
        configuration = HBaseConfiguration.create();
        configuration.set("hbase.rootdir", "hdfs://localhost:9000/hbase");
        try {
            connection = ConnectionFactory.createConnection(configuration);
            admin = connection.getAdmin();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void close() {
        try {
            if (admin != null) {
                admin.close();
            }
            if (null != connection) {
                connection.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        String[] fields = {"Score:Math", "Score:Computer Science", "Score:English"};
        String[] values = {"99", "80", "100"};
        try {
            addRecord("person", "Score", fields, values);
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

在这里插入图片描述

（3）.scanColumn(String tableName, String column)

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.TableName;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.util.Bytes;

import java.io.IOException;

public class ScanColumn {
    public static Configuration configuration;
    public static Connection connection;
    public static Admin admin;

    public static void scanColumn(String tableName, String column) throws IOException {
        init();
        Table table = connection.getTable(TableName.valueOf(tableName));
        Scan scan = new Scan();
        scan.addFamily(Bytes.toBytes(column));
        ResultScanner scanner = table.getScanner(scan);
        for (Result result = scanner.next(); result != null; result = scanner.next()) {
            showCell(result);
        }
        table.close();
        close();
    }

    public static void showCell(Result result) {
        Cell[] cells = result.rawCells();
        for (Cell cell : cells) {
            System.out.println("RowName:" + new String(CellUtil.cloneRow(cell)) + " ");
            System.out.println("Timetamp:" + cell.getTimestamp() + " ");
            System.out.println("column Family:" + new String(CellUtil.cloneFamily(cell)) + " ");
            System.out.println("row Name:" + new String(CellUtil.cloneQualifier(cell)) + " ");
            System.out.println("value:" + new String(CellUtil.cloneValue(cell)) + " ");
        }
    }

    public static void init() {
        configuration = HBaseConfiguration.create();
        configuration.set("hbase.rootdir", "hdfs://localhost:9000/hbase");
        try {
            connection = ConnectionFactory.createConnection(configuration);
            admin = connection.getAdmin();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    // 关闭连接
    public static void close() {
        try {
            if (admin != null) {
                admin.close();
            }
            if (null != connection) {
                connection.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        try {
            scanColumn("person", "Score");
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

在这里插入图片描述

（4）.modifyData(String tableName, String row, String column)

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.*;

import java.io.IOException;

public class ModifyData {

    public static long ts;
    public static Configuration configuration;
    public static Connection connection;
    public static Admin admin;

    public static void modifyData(String tableName, String row, String column, String val) throws IOException {
        init();
        Table table = connection.getTable(TableName.valueOf(tableName));
        Put put = new Put(row.getBytes());
        Scan scan = new Scan();
        ResultScanner resultScanner = table.getScanner(scan);
        for (Result r : resultScanner) {
            for (Cell cell : r.getColumnCells(row.getBytes(), column.getBytes())) {
                ts = cell.getTimestamp();
            }
        }
        put.addColumn(row.getBytes(), column.getBytes(), ts, val.getBytes());
        table.put(put);
        table.close();
        close();
    }

    public static void init() {
        configuration = HBaseConfiguration.create();
        configuration.set("hbase.rootdir", "hdfs://localhost:9000/hbase");
        try {
            connection = ConnectionFactory.createConnection(configuration);
            admin = connection.getAdmin();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void close() {
        try {
            if (admin != null) {
                admin.close();
            }
            if (null != connection) {
                connection.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        try {
            modifyData("person", "Score", "Math", "100");
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

在这里插入图片描述

（5）.deleteRow(String tableName, String row)

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.util.Bytes;

import java.io.IOException;

public class DeleteRow {

    public static long ts;
    public static Configuration configuration;
    public static Connection connection;
    public static Admin admin;

    public static void deleteRow(String tableName, String row) throws IOException {
        init();
        Table table = connection.getTable(TableName.valueOf(tableName));
        Delete delete=new Delete(row.getBytes());
        table.delete(delete);
        table.close();
        close();
    }

    public static void init() {
        configuration = HBaseConfiguration.create();
        configuration.set("hbase.rootdir", "hdfs://localhost:9000/hbase");
        try {
            connection = ConnectionFactory.createConnection(configuration);
            admin = connection.getAdmin();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void close() {
        try {
            if (admin != null) {
                admin.close();
            }
            if (null != connection) {
                connection.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        try {
            deleteRow("person", "Score");
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

在这里插入图片描述

5.HBase Shell命令及Java API编程

编程实现以下指定功能，并用Hadoop提供的HBase Shell命令完成相同任务：
(1)列出HBase所有的表的相关信息，例如表名
(2)在终端打印出指定的表的所有记录数据
(3)向已经创建好的表添加和删除指定的列族或列
(4)清空指定的表的所有记录数据
(5)统计表的行数
这里给出参考地址:
小侄儿的博客

6.HBase Java API编程

编程创建一个学生信息表，其包含的列族为：name，score:English,score:Math,score:Computer.其中姓名作为行键。表创建好之后向该表添加数据并对其进行浏览。

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.util.Bytes;

import java.io.IOException;
import java.util.Scanner;
public class Sixth {
	public static Configuration configuration;
    public static Connection connection;
    public static Admin admin;
    public static long ts;
    static Scanner sc=new Scanner(System.in);
    public static void main(String[] args) throws IOException{
    	System.out.println("1、创建一个表;2、插入数据;3、浏览数据");
    	System.out.println("输入选择：");
    	int no=sc.nextInt();
    	while (true){
    		if (no==1){
        		createTable("Student",new String[]{"name","score"});break;
        	}
    		
    		else if(no==2){
    			
        		insertRow("Student","zhangsan","name","","zhangsan");
        		insertRow("Student","zhangsan","score","English","98");
        		insertRow("Student","zhangsan","score","Math","91");
        		insertRow("Student","zhangsan","score","Computer","100");
        		System.out.println("插入数据成功！");break;
        		
        	}else if(no==3){
        		getData("Student","zhangsan","score","Math");
        		System.out.println("----------------------");
        		getData("Student","zhangsan","score","English");
        		System.out.println("----------------------");
        		getData("Student","zhangsan","score","Computer");
        		break;
        	}
    	}
    
    }
    public static void createTable(String myTableName,String[] colFamily) throws IOException {
    	 
        init();
        TableName tableName = TableName.valueOf(myTableName);
 
        if(admin.tableExists(tableName)){
            System.out.println("talbe is exists!");
        }else {
            HTableDescriptor hTableDescriptor = new HTableDescriptor(tableName);
            for(String str:colFamily){
                HColumnDescriptor hColumnDescriptor = new HColumnDescriptor(str);
                hTableDescriptor.addFamily(hColumnDescriptor);
            }
            admin.createTable(hTableDescriptor);
            System.out.println("create table success");
        }
        close();
    }
    public static void insertRow(String tableName,String rowKey,String colFamily,String col,String val) throws IOException {
        init();
        Table table = connection.getTable(TableName.valueOf(tableName));
        Put put = new Put(rowKey.getBytes());
        put.addColumn(colFamily.getBytes(), col.getBytes(), val.getBytes());
        table.put(put);
        table.close();
        close();
    }
    public static void getData(String tableName,String rowKey,String colFamily,String col)throws  IOException{
        init();
        Table table = connection.getTable(TableName.valueOf(tableName));
        Get get = new Get(rowKey.getBytes());
        get.addColumn(colFamily.getBytes(),col.getBytes());
        Result result = table.get(get);
        showCell(result);
        table.close();
        close();
    }

    public static void showCell(Result result){
        Cell[] cells = result.rawCells();
        for(Cell cell:cells){
            System.out.println("RowName:"+new String(CellUtil.cloneRow(cell))+" ");
            System.out.println("Timetamp:"+cell.getTimestamp()+" ");
            System.out.println("column Family:"+new String(CellUtil.cloneFamily(cell))+" ");
            System.out.println("row Name:"+new String(CellUtil.cloneQualifier(cell))+" ");
            System.out.println("value:"+new String(CellUtil.cloneValue(cell))+" ");
        }
    }
    public static void init(){
        configuration  = HBaseConfiguration.create();
        configuration.set("hbase.rootdir","hdfs://localhost:9000/hbase");
        try{
            connection = ConnectionFactory.createConnection(configuration);
            admin = connection.getAdmin();
        }catch (IOException e){
            e.printStackTrace();
        }
    }
    //关闭连接
    public static void close(){
        try{
            if(admin != null){
                admin.close();
            }
            if(null != connection){
                connection.close();
            }
        }catch (IOException e){
            e.printStackTrace();
        }
    }
}

在这里插入图片描述
在这里插入图片描述
在这里插入图片描述

三分奶茶七分糖丶
原创文章 31 获赞 60 访问量 3108
关注 私信

猜你喜欢

转载自blog.csdn.net/qq_40651017/article/details/105510276
今日推荐
《美国对全球网络空间安全与发展的威胁和破坏》报告发布
火速冲上 GitHub 热榜 —— 开源编程语言、框架哪有这么可爱？
北京人形机器人创新中心发布全球首个纯电驱拟人奔跑的全尺寸人形机器人“天工”
LFOSSA 源来如此公开课 | 掌握云原生未来：CNCF 认证全面攻略与备考秘籍
国产云输入法——仅华为无云端数据上传安全问题
开源日报 | 工业开源项目OGG 1.0；姐姐，你要和我一起配置火狐吗；苹果AI遥遥落后？Fedora 40
周排行
购置笔记本常识
从源码看Spring Security之采坑笔记（Spring Boot篇）
大数据学习——高可用配置案例
如何避免选择不专业的建站公司?
Euclid's Game HDU - 1525（博弈）
面试笔记（六）---Js实现eventHandler
Windows 实例搭建的 FTP 在外网无法连接和访问
设计模式 : 桥接模式
USB 设备驱动开发之几个重要结构体分析
14-p14_sqrt求平方根
每日归档
更多
2024-04-29(40)
2024-04-28(0)
2024-04-27(56)
2024-04-26(39)
2024-04-25(22)
2024-04-24(36)
2024-04-23(26)
2024-04-22(39)
2024-04-21(0)
2024-04-20(6)

代码天地 © 2018 codetd.com

境外服务器   最新电视剧2022