HBase -- javaAPI 基础篇（创建hbase表，添加数据，查询）

pom文件配置：

        
            cloudera
            https://repository.cloudera.com/artifactory/cloudera-repos/
        
    
    
        
            org.apache.hadoop
            hadoop-client
            2.6.0-mr1-cdh5.14.0
        
        
            org.apache.hbase
            hbase-client
            1.2.0-cdh5.14.0
        
        
            org.apache.hbase
            hbase-server
            1.2.0-cdh5.14.0
        
        
            junit
            junit
            4.12
            test
        
        
            org.testng
            testng
            6.14.3
            test

        
        
            org.junit.jupiter
            junit-jupiter-api
            RELEASE
            compile
        
    
    
        
            
                org.apache.maven.plugins
                maven-compiler-plugin
                3.0
                
                    1.8
                    1.8
                    UTF-8
                    
                
            
            
                org.apache.maven.plugins
                maven-shade-plugin
                2.2
                
                    
                        package
                        
                            shade
                        
                        
                            
                                
                                    *:*
                                    
                                        META-INF/*.SF
                                        META-INF/*.DSA
                                        META-INF/*/RSA
                                    
                                
                            
                        
                    
                
            
        
    

 

代码：

package com.czxy.demo1;

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.ArrayList;
import java.util.List;

/**
 * @author kismet
 * @date 2019-12-17 15:29
 */
public class Hbase01 {


    /**
     * 创建一个新的表myuser，列族为f1，f2
     * @throws IOException
     */
    public static void createTable() throws IOException {
        //创建连接
        Configuration conf = new Configuration();
        conf.set("hbase.zookeeper.quorum","node01:2181,node02:2181,node03:2181");
        Connection connection = ConnectionFactory.createConnection(conf);
        //实例admin管理员 创建 删除hbase表需要使用的admin
        Admin admin = connection.getAdmin();
        //创建表 表名：myuser
        TableName myuser = TableName.valueOf("myuser2");
        //设置表结构
        HTableDescriptor hTableDescriptor = new HTableDescriptor(myuser);
        //创建列族为f1，f2
        HColumnDescriptor f1 = new HColumnDescriptor("f1");
        HColumnDescriptor f2 = new HColumnDescriptor("f2");
        //建立表与列族间的关系
        hTableDescriptor.addFamily(f1);
        hTableDescriptor.addFamily(f2);
        admin.createTable(hTableDescriptor);
        admin.close();
        //关闭连接
        connection.close();
    }

    /**
     * 向myuser表中添加一条数据，rowkey为0001，在列族f1里添加列id，name，age， 在列族f1里添加列address，phone
     * @throws IOException
     */
    public static void addDatas() throws IOException {
        //创建连接
        Configuration conf = new Configuration();
        conf.set("hbase.zookeeper.quorum", "node01:2181,node02:2181");
        Connection connection = ConnectionFactory.createConnection(conf);
        //获取表
        Table myuser = connection.getTable(TableName.valueOf("myuser"));
        //创建put对象，并指定rowkey
        Put put = new Put("0001".getBytes());
        //添加列
        put.addColumn("f1".getBytes(),"id".getBytes(), Bytes.toBytes(1));
        put.addColumn("f1".getBytes(),"name".getBytes(), Bytes.toBytes("张三"));
        put.addColumn("f1".getBytes(),"age".getBytes(), Bytes.toBytes(18));
        put.addColumn("f2".getBytes(),"address".getBytes(), Bytes.toBytes("地球人"));
        put.addColumn("f2".getBytes(),"phone".getBytes(), Bytes.toBytes("158741025aa"));
        //插入数据
        myuser.put(put);
        //关闭表
        myuser.close();
    }

    /**
     * 向myuser表中添加多条数据
     * @throws IOException
     */
    public static void putdatas() throws IOException {
        //创建连接
        Configuration conf = new Configuration();
        conf.set("hbase.zookeeper.quorum", "node01:2181,node02:2181");
        Connection connection = ConnectionFactory.createConnection(conf);
        //获取表
        Table myuser = connection.getTable(TableName.valueOf("myuser"));
        //创建put对象，并指定rowkey
        Put put = new Put("0002".getBytes());
        put.addColumn("f1".getBytes(),"id".getBytes(),Bytes.toBytes(1));
        put.addColumn("f1".getBytes(),"name".getBytes(),Bytes.toBytes("曹操"));
        put.addColumn("f1".getBytes(),"age".getBytes(),Bytes.toBytes(30));
        put.addColumn("f2".getBytes(),"sex".getBytes(),Bytes.toBytes("1"));
        put.addColumn("f2".getBytes(),"address".getBytes(),Bytes.toBytes("沛国谯县"));
        put.addColumn("f2".getBytes(),"phone".getBytes(),Bytes.toBytes("16888888888"));
        put.addColumn("f2".getBytes(),"say".getBytes(),Bytes.toBytes("helloworld"));

        Put put2 = new Put("0003".getBytes());
        put2.addColumn("f1".getBytes(),"id".getBytes(),Bytes.toBytes(2));
        put2.addColumn("f1".getBytes(),"name".getBytes(),Bytes.toBytes("刘备"));
        put2.addColumn("f1".getBytes(),"age".getBytes(),Bytes.toBytes(32));
        put2.addColumn("f2".getBytes(),"sex".getBytes(),Bytes.toBytes("1"));
        put2.addColumn("f2".getBytes(),"address".getBytes(),Bytes.toBytes("幽州涿郡涿县"));
        put2.addColumn("f2".getBytes(),"phone".getBytes(),Bytes.toBytes("17888888888"));
        put2.addColumn("f2".getBytes(),"say".getBytes(),Bytes.toBytes("talk is cheap , show me the code"));


        Put put3 = new Put("0004".getBytes());
        put3.addColumn("f1".getBytes(),"id".getBytes(),Bytes.toBytes(3));
        put3.addColumn("f1".getBytes(),"name".getBytes(),Bytes.toBytes("孙权"));
        put3.addColumn("f1".getBytes(),"age".getBytes(),Bytes.toBytes(35));
        put3.addColumn("f2".getBytes(),"sex".getBytes(),Bytes.toBytes("1"));
        put3.addColumn("f2".getBytes(),"address".getBytes(),Bytes.toBytes("下邳"));
        put3.addColumn("f2".getBytes(),"phone".getBytes(),Bytes.toBytes("12888888888"));
        put3.addColumn("f2".getBytes(),"say".getBytes(),Bytes.toBytes("what are you 弄啥嘞！"));

        Put put4 = new Put("0005".getBytes());
        put4.addColumn("f1".getBytes(),"id".getBytes(),Bytes.toBytes(4));
        put4.addColumn("f1".getBytes(),"name".getBytes(),Bytes.toBytes("诸葛亮"));
        put4.addColumn("f1".getBytes(),"age".getBytes(),Bytes.toBytes(28));
        put4.addColumn("f2".getBytes(),"sex".getBytes(),Bytes.toBytes("1"));
        put4.addColumn("f2".getBytes(),"address".getBytes(),Bytes.toBytes("四川隆中"));
        put4.addColumn("f2".getBytes(),"phone".getBytes(),Bytes.toBytes("14888888888"));
        put4.addColumn("f2".getBytes(),"say".getBytes(),Bytes.toBytes("出师表你背了嘛"));

        Put put5 = new Put("0005".getBytes());
        put5.addColumn("f1".getBytes(),"id".getBytes(),Bytes.toBytes(5));
        put5.addColumn("f1".getBytes(),"name".getBytes(),Bytes.toBytes("司马懿"));
        put5.addColumn("f1".getBytes(),"age".getBytes(),Bytes.toBytes(27));
        put5.addColumn("f2".getBytes(),"sex".getBytes(),Bytes.toBytes("1"));
        put5.addColumn("f2".getBytes(),"address".getBytes(),Bytes.toBytes("哪里人有待考究"));
        put5.addColumn("f2".getBytes(),"phone".getBytes(),Bytes.toBytes("15888888888"));
        put5.addColumn("f2".getBytes(),"say".getBytes(),Bytes.toBytes("跟诸葛亮死掐"));


        Put put6 = new Put("0006".getBytes());
        put6.addColumn("f1".getBytes(),"id".getBytes(),Bytes.toBytes(5));
        put6.addColumn("f1".getBytes(),"name".getBytes(),Bytes.toBytes("xiaobubu—吕布"));
        put6.addColumn("f1".getBytes(),"age".getBytes(),Bytes.toBytes(28));
        put6.addColumn("f2".getBytes(),"sex".getBytes(),Bytes.toBytes("1"));
        put6.addColumn("f2".getBytes(),"address".getBytes(),Bytes.toBytes("内蒙人"));
        put6.addColumn("f2".getBytes(),"phone".getBytes(),Bytes.toBytes("15788888888"));
        put6.addColumn("f2".getBytes(),"say".getBytes(),Bytes.toBytes("貂蝉去哪了"));

        List listPut = new ArrayList();
        listPut.add(put);
        listPut.add(put2);
        listPut.add(put3);
        listPut.add(put4);
        listPut.add(put5);
        listPut.add(put6);
        myuser.put(listPut);
        myuser.close();
    }

    /**
     *查询主键rowkey为0003的人
     * @throws IOException
     */
    public static void searchData() throws IOException {
        //创建连接
        Configuration configuration = new Configuration();
        configuration.set("hbase.zookeeper.quorum", "node01:2181,node02:2181");
        Connection connection = ConnectionFactory.createConnection(configuration);
        //指定表
        Table myuser = connection.getTable(TableName.valueOf("myuser"));
        //设置需要读取的数据（rowkey）
        Get get = new Get("0004".getBytes());
        //读取数据，一个result 一行数据
        Result result = myuser.get(get);
        //遍历数据
        Cell[] cells = result.rawCells();
        for (Cell cell : cells) {
            //所属的列族
//            System.out.println(Bytes.toString(CellUtil.cloneFamily(cell)));
            //所属的列
//            System.out.println(Bytes.toString(CellUtil.cloneQualifier(cell)));
            //值
//            System.out.println(Bytes.toInt(CellUtil.cloneValue(cell)));
            if (Bytes.toString(CellUtil.cloneQualifier(cell)).equals("id")||Bytes.toString(CellUtil.cloneQualifier(cell)).equals("age")){
                System.out.println(Bytes.toString(CellUtil.cloneFamily(cell))+"-->"+Bytes.toString(CellUtil.cloneQualifier(cell))+":"+Bytes.toInt(CellUtil.cloneValue(cell)));
            }else {
                System.out.println(Bytes.toString(CellUtil.cloneFamily(cell))+"-->"+Bytes.toString(CellUtil.cloneQualifier(cell))+":"+Bytes.toString(CellUtil.cloneValue(cell)));
            }
        }
        connection.close();
    }

    /**
     * 按照rowkey查询指定列族下面的指定列的值
     * @throws IOException
     */
    public static void searchdata2() throws IOException {
        Configuration conf=new Configuration();
        conf.set("hbase.zookeeper.quorum","node01:2181,node02:2181,node03:2181");
        Connection connection = ConnectionFactory.createConnection(conf);
        Table myuser = connection.getTable(TableName.valueOf("myuser"));
        Get get = new Get("0003".getBytes());
        get.addColumn("f1".getBytes(),"name".getBytes());
        Result result = myuser.get(get);
        Cell[] cells = result.rawCells();
        for (Cell cell : cells) {
            System.out.println(Bytes.toString(CellUtil.cloneValue(cell)));
        }
        connection.close();
    }

    /**
     *通过startRowKey和endRowKey进行扫描
     * @throws IOException
     */
    public static void scanrowkey() throws IOException {
        Configuration conf=new Configuration();
        conf.set("hbase.zookeeper.quorum","node01:2181,node02:2181,node03:2181");
        Connection connection = ConnectionFactory.createConnection(conf);
        Table myuser = connection.getTable(TableName.valueOf("myuser"));
        Scan scan = new Scan();
        scan.setStartRow("0002".getBytes());
        scan.setStopRow("0006".getBytes());
        ResultScanner scanner = myuser.getScanner(scan);
        for (Result result : scanner) {
            Cell[] cells = result.rawCells();
            for (Cell cell : cells) {
                if (Bytes.toString(CellUtil.cloneQualifier(cell)).equals("id")||Bytes.toString(CellUtil.cloneQualifier(cell)).equals("age")){
                    System.out.println(Bytes.toString(CellUtil.cloneRow(cell))+":"+Bytes.toString(CellUtil.cloneFamily(cell))+"-->"+Bytes.toString(CellUtil.cloneQualifier(cell))+":"+Bytes.toInt(CellUtil.cloneValue(cell)));
                }else {
                    System.out.println(Bytes.toString(CellUtil.cloneRow(cell))+":"+Bytes.toString(CellUtil.cloneFamily(cell))+"-->"+Bytes.toString(CellUtil.cloneQualifier(cell))+":"+Bytes.toString(CellUtil.cloneValue(cell)));
                }
            }
        }
        connection.close();
    }

    /**
     * 全表扫描
     * @throws IOException
     */
    public static void scanrow() throws IOException {
        Configuration conf=new Configuration();
        conf.set("hbase.zookeeper.quorum","node01:2181,node02:2181,node03:2181");
        Connection connection = ConnectionFactory.createConnection(conf);
        Table myuser = connection.getTable(TableName.valueOf("myuser"));
        Scan scan =new Scan();
        ResultScanner scanner = myuser.getScanner(scan);
        for (Result result : scanner) {
            Cell[] cells = result.rawCells();
            for (Cell cell : cells) {
                if (Bytes.toString(CellUtil.cloneQualifier(cell)).equals("id")||Bytes.toString(CellUtil.cloneQualifier(cell)).equals("age")){
                    System.out.println(Bytes.toString(CellUtil.cloneRow(cell))+":"+Bytes.toString(CellUtil.cloneFamily(cell))+"-->"+Bytes.toString(CellUtil.cloneQualifier(cell))+":"+Bytes.toInt(CellUtil.cloneValue(cell)));
                }else {
                    System.out.println(Bytes.toString(CellUtil.cloneRow(cell))+":"+Bytes.toString(CellUtil.cloneFamily(cell))+"-->"+Bytes.toString(CellUtil.cloneQualifier(cell))+":"+Bytes.toString(CellUtil.cloneValue(cell)));
                }
            }
        }
        connection.close();
    }

    public static void main(String[] args) throws IOException {
//        createTable();
//        addDatas();
//        putdatas();
//        searchData();
//        searchdata2();
//        scanrowkey();
//        scanrow();
    }
}