hbase的API

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;


public class HbaseClients {
    public static  Connection connection;
    public static void main(String[] args) throws Exception {
        create("kgc","cf1","cf2","cf3");
        //delete("kgc");
        //scan("test02");
    }
    //初始化的参数，连接对象
    static {
        //conf
        Configuration conf = HBaseConfiguration.create();
        conf.set("hbase.zookeeper.quorum", "192.168.159.110");
        conf.set("hbase.zookeeper.property.clientPort","2181");
        //获取hbase链接对象ConnectionFactory
        try {
            connection = ConnectionFactory.createConnection(conf);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    //创建表
    public static void create(String table,String ... familys) throws Exception {
        //首先要拿到admin
        Admin admin = connection.getAdmin();
        //new
        HTableDescriptor htable = new HTableDescriptor(TableName.valueOf(table));
        //htable
        for (String family : familys) {
            htable.addFamily(new HColumnDescriptor(family));
        }
        admin.createTable(htable);
        System.out.println("创建成功");
    }
    //删除表
    public static void delete(String table) throws Exception {
        Admin admin = connection.getAdmin();
        //判断表是否存在
        if(admin.tableExists(TableName.valueOf(table))){
            //下线了
            admin.disableTable(TableName.valueOf(table));
            //删除
            admin.deleteTable(TableName.valueOf(table));
            System.out.println("删除成功");
        }else{
            System.out.println("对不起，表不存在");
        }
    }
    //添加数据
    public static void adddata(String table,String rowkey,String columnFamily,String column,String value) throws Exception {
        Table table1 = connection.getTable(TableName.valueOf(table));
        //NEW  PUT
        Put puts = new Put(Bytes.toBytes(rowkey));
        //puts
        puts.add(Bytes.toBytes(columnFamily),Bytes.toBytes(column),Bytes.toBytes(value));
        table1.put(puts);
        System.out.println("添加数据成功");
    }
    //删除一行（rowkey）数据
    public static void delterow(String table,String  rowkey) throws Exception {
        Table table1 = connection.getTable(TableName.valueOf(table));
        //new Delete
        Delete deletes = new Delete(Bytes.toBytes(rowkey));
        //删除
        table1.delete(deletes);
        System.out.println("删除一行数据成功");
    }
    //删除多行数据
    public static void deleterows(String table,String ... rowkeys) throws Exception {
        Table table1 = connection.getTable(TableName.valueOf(table));
        //new List
        ArrayList<Delete> list = new ArrayList<>();
        for (String rowkey : rowkeys) {
            list.add(new Delete(Bytes.toBytes(rowkey)));
        }
        table1.delete(list);
        System.out.println("删除多行成功");
    }
    //scan扫描
    public static void scan(String table) throws Exception {
        Table table1 = connection.getTable(TableName.valueOf(table));
        //new Scan
        Scan scan = new Scan();
        //results 就是所有的rowkey的集合
        ResultScanner results = table1.getScanner(scan);
        for (Result result : results) {
            //cells 的集合
            Cell[] cells = result.rawCells();
            for (Cell cell : cells) {
                System.out.println(Bytes.toString(cell.getRow()));
                System.out.println(Bytes.toString(cell.getFamily()));
                System.out.println(Bytes.toString(cell.getQualifier()));
                System.out.println(Bytes.toString(cell.getValue()));
            }
        }
    }
    //get
    public static void get(String table,String rowkey) throws Exception {
        Table table1 = connection.getTable(TableName.valueOf(table));
        //new Get
        Get get = new Get(Bytes.toBytes(rowkey));
        Result result = table1.get(get);
        Cell[] cells = result.rawCells();
        for (Cell cell : cells) {
            System.out.println(Bytes.toString(cell.getRow()));
            System.out.println(Bytes.toString(cell.getFamily()));
            System.out.println(Bytes.toString(cell.getQualifier()));
            System.out.println(Bytes.toString(cell.getValue()));
        }
    }
}