import java.io.IOException;

import java.util.Scanner;

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.hbase.HBaseConfiguration;

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 org.apache.hadoop.hbase.client.Result;

import org.apache.hadoop.hbase.client.ResultScanner;

import org.apache.hadoop.hbase.client.Scan;

import org.apache.hadoop.hbase.client.Table;

public class Test_5 {

    public static Configuration configuration;

    public static Connection connection;

    public static Admin admin;

    //建立连接

    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 countRows (String tableName) throws IOException

     {

         init();

         Table table = connection.getTable(TableName.valueOf(tableName));

         Scan scan = new Scan();

         ResultScanner scanner =table.getScanner(scan);

         int num = 0;

         for(Result result = scanner.next();result!=null;result=scanner.next())

         {

             num++;

         }

         System.out.println("行数："+num);

         scanner.close();

         close();

     }

    /**

     * @param args

     * @throws IOException 

     */

    public static void main(String[] args) throws IOException {

        // TODO Auto-generated method stub

        Test_5 test_5=new Test_5();

        Scanner scan = new Scanner(System.in);

        System.out.println("请输入要统计行数的表名");

        String tableName=scan.nextLine();

        test_5.countRows(tableName);

    }

}