HBase-client的基本操作

package com.hlxt;

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.LinkedHashMap;

public class HbaseUtils {


    Configuration config = HBaseConfiguration.create();
    Connection connection;
    Admin admin;

    //初始化提供  hbase ip 和 zk端口
    public HbaseUtils(String ip, String port, String master) throws IOException {
        this.config.set("hbase.zookeeper.quorum", ip);
        this.config.set("hbase.zookeeper.property.clientPort", port);
        this.config.set("hbase.master", master);
        this.connection = ConnectionFactory.createConnection(this.config);
        admin=connection.getAdmin();
    }


    //创建表（没查重）
    public void createTable(String tablename, String[] family) throws IOException {

        TableName tn = TableName.valueOf(tablename);

        if (!admin.tableExists(tn)) {
            HTableDescriptor htd = new HTableDescriptor(tn);
            String[] var5 = family;
            int var6 = family.length;

            for (int var7 = 0; var7 < var6; ++var7) {
                String f = var5[var7];
                htd.addFamily(new HColumnDescriptor(f));
            }
            admin.createTable(htd);
            admin.close();
            //this.connection.close();  (再加关闭的函数)
            System.out.println("表：" + tablename + "创建成功");
        } else {
            System.out.println("表：" + tn + "已存在");
        }
    }

    //删除表
    public void deleteTable(String tablename) throws IOException {


        TableName tn = TableName.valueOf(tablename);
        try {
            if (admin.tableExists(tn)) {
                admin.disableTable(tn);
                admin.deleteTable(tn);
                System.out.println("删除成功");
            } else {

                System.out.println("删除失败 该表不存在");

            }

        } catch (IOException e) {
            e.printStackTrace();
        }


    }


    //查询所有表
    public TableName[] getTableList() throws IOException {

        TableName[] tableNames = admin.listTableNames();
        for (TableName tn : tableNames
                ) {
            System.out.println(tn);

        }

        return tableNames;

    }


    //查询数据 by  rowkey
    public Result getByRowKey(String tablename, String rowkey) throws IOException {

        TableName tn = TableName.valueOf(tablename);

        if (admin.tableExists(tn)) {
            System.out.println(tn+"表存在");
            Table table = connection.getTable(tn);
            Result result = table.get(new Get(Bytes.toBytes(rowkey)));
            System.out.println("开始查询");
            for (Cell cell:result.listCells()
                 ) {

                System.out.println("rowkey:"+rowkey);
                System.out.println("family:"+new String( CellUtil.cloneFamily( cell ) ));
                System.out.println("value:"+new String( CellUtil.cloneValue( cell ) ));

            }
            return result;
        } else {
            System.out.println("表不存在");
            return null;
        }


    }

    //插入数据
    public void putData(TableArr arr) throws IOException {

        TableName tn = TableName.valueOf(arr.getTablename());

            Table table = connection.getTable(tn);
            Put put =new Put(Bytes.toBytes(arr.getRowkey()));

            put.addColumn(Bytes.toBytes(arr.getFamilyname()),Bytes.toBytes(arr.getColnumname()),Bytes.toBytes(arr.getValue()));
            table.put(put);

            System.out.println("插入成功");

            //checkAndPut 方法   传入值与服务器上的数据比较  如果为真 就插入

    }

// 插入数据
    public void incrData(TableArr arr) throws IOException {
        TableName tn = TableName.valueOf(arr.getTablename());

        Table table = connection.getTable(tn);
        Long resut= table.incrementColumnValue( Bytes.toBytes(arr.getRowkey()), Bytes.toBytes(arr.getFamilyname()), Bytes.toBytes(arr.getColnumname()), arr.getValue() );
          System.out.println( resut );


    }

}