import java.io.IOException;

import java.util.Collection;

import java.util.Iterator;

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

public class A_getAllInfo {

    public static Configuration configuration;

    public static Connection connection;

    public static Admin admin;

    /**

     * @param args

     */

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

        getAllInfo();

        // TODO Auto-generated method stub

    }

    //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 getAllInfo() throws IOException {

        init();

        HTableDescriptor hTableDescriptors[] = admin.listTables();

        for(HTableDescriptor hTableDescriptor :hTableDescriptors){

            System.out.println(hTableDescriptor.getNameAsString());

            Table table = connection.getTable(TableName.valueOf(hTableDescriptor.getNameAsString()));

            HTableDescriptor HTableDes = table.getTableDescriptor();

            Collection<HColumnDescriptor> a = HTableDes.getFamilies();

            Iterator<HColumnDescriptor> it = a.iterator() ;

            while(it.hasNext())

            {

                HColumnDescriptor next = it.next();

                System.out.println(next);

            }

            table.close();

        }

        close();

    }

}