单机Hbase部署以及Java远程连接单机Hbase

Hbase数据库是在linux系统下开发的，首先 要安装一个虚拟机，再装上linux

一.安装Hbase单机模式

  1.官方下载Hbase    http://apache.claz.org/hbase/,本人下载1.2.6版本           hbase-1.2.6-bin.tar.gz               

  2.解压操作   我把他解压到/usr/Hbase  路径下    Hbase为新建的文件夹

3 Hbase配置   在conf文件夹中

配置hbase-env.sh

编辑JAVA_HOME环境变量，改变路径到当前JAVA_HOME变量：

export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-amd64

java 可以使用linux自带的jdk 也可以自己安装配置，因为我自带的jdk是1.8版本的，所以就直接使用了自带的jdk.主要是看jdk的版本。

将这两个export删去。否则会报错

配置hbase-site.xml

设置数据保存的目录

        hbase.rootdir

        file:/usr/Hbase/hbase-1.2.6/database

    

到此 HBase 的安装配置已成功完成。

4.运行Hbase

可以通过使用 HBase 的 bin 文件夹中提供 start-hbase.sh 脚本启动 HBase。

在bin目录中打开终端，运行下面这个命令

 sudo  ./start-hbase.sh

出现下面就okl

starting master, logging to /usr/Hbase/hbase-1.2.6/bin/../logs/hbase-root-master-shi-virtual-machine.out

打开浏览器   在网址输入框 输入 localhost:16010 弹出下图即可

进入hbase shell 界面

在bin界面 输入

./hbase shell

单机模式的Hbase就安装完成了

 

二.java连接Hbase

我是在win10系统中连接的虚拟机上linux系统里的Hbase

1.创建java工程，

2.导入jar包

jar包最好使用的是hbase中lib里面的jar将这些jar包导入工程中，他对版本的要求比较高，所以使用hbasez中的jar包最好。

3.贴入代码

package com.sjy.Hbasetest;

import java.io.IOException;

import java.util.HashMap;

import java.util.Map;

import java.util.ArrayList;

import java.util.List;

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.KeyValue;

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

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

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

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

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

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.util.Bytes;

public class Test

{

       static final String rowKey = "row1" ;

       static HBaseAdmin hBaseAdmin ;

       static Configuration conf ;

       static

      {

            conf = HBaseConfiguration. create ();

//linux的ip

            conf .set( "hbase.zookeeper.quorum" , "192.168.175.134" );

            try

           {

                  hBaseAdmin = new HBaseAdmin ( conf ) ;

           } catch (IOException e )

           {

                  e .printStackTrace();

           }

      }

       public static void createTable(String tableName , String[] columns ) throws Exception

      {

            dropTable ( tableName );

           HTableDescriptor hTableDescriptor = new HTableDescriptor ( tableName ) ;

            for (String columnName : columns )

           {

                 HColumnDescriptor column = new HColumnDescriptor( columnName );

                  hTableDescriptor .addFamily( column );

           }

            hBaseAdmin .createTable( hTableDescriptor );

           System. out .println( "create table successed" );

      }

       public static void dropTable(String tableName ) throws Exception

      {

            if ( hBaseAdmin .tableExists( tableName ))

           {

                  hBaseAdmin .disableTable( tableName );

                  hBaseAdmin .deleteTable( tableName );

           }

           System. out .println( "drop table successed" );

      }

       public static HTable getHTable(String tableName ) throws Exception

      {

            return new HTable ( conf , tableName ) ;

      }

       public static void insert(String tableName , Map map ) throws Exception

      {

           HTable hTable = getHTable ( tableName );

            byte [] row1 = Bytes. toBytes ( rowKey );

           Put p1 = new Put( row1 );

            for (String columnName : map .keySet())

           {

                  byte [] value = Bytes. toBytes ( map .get( columnName ));

                 String[] str = columnName .split( ":" );

                  byte [] family = Bytes. toBytes ( str [0]);

                  byte [] qualifier = null ;

                  if ( str . length > 1)

                 {

                       qualifier = Bytes. toBytes ( str [1]);

                 }

                  p1 . add ( family , qualifier , value ) ;

           }

            hTable .put( p1 );

           Get g1 = new Get( row1 );

           Result result = hTable .get( g1 );

           System. out .println( "Get: " + result );

           System. out .println( "insert successed" );

      }

       public static void delete(String tableName , String rowKey ) throws Exception

      {

           HTable hTable = getHTable ( tableName );

           List list = new ArrayList();

           Delete d1 = new Delete(Bytes. toBytes ( rowKey ));

            list .add( d1 );

            hTable .delete( list );

           Get g1 = new Get(Bytes. toBytes ( rowKey ));

           Result result = hTable .get( g1 );

           System. out .println( "Get: " + result );

           System. out .println( "delete successed" );

      }

       public static void selectOne(String tableName , String rowKey ) throws Exception

      {

           HTable hTable = getHTable ( tableName );

           Get g1 = new Get(Bytes. toBytes ( rowKey ));

           Result result = hTable .get( g1 );

            foreach ( result );

           System. out .println( "selectOne end" );

      }

       private static void foreach(Result result ) throws Exception

      {

            for (KeyValue keyValue : result . raw () )

           {

                 StringBuilder sb = new StringBuilder();

                  sb .append(Bytes. toString ( keyValue . getRow () )).append( "\t" );

                  sb .append(Bytes. toString ( keyValue . getFamily () )).append( "\t" );

                  sb .append(Bytes. toString ( keyValue . getQualifier () )).append( "\t" );

                  sb .append( keyValue .getTimestamp()).append( "\t" );

                  sb .append(Bytes. toString ( keyValue . getValue () )).append( "\t" );

                 System. out .println( sb .toString());

           }

      }

       public static void selectAll(String tableName ) throws Exception

      {

           HTable hTable = getHTable ( tableName );

           Scan scan = new Scan();

           ResultScanner resultScanner = null ;

            try

           {

                  resultScanner = hTable .getScanner( scan );

                  for (Result result : resultScanner )

                 {

                       foreach ( result );

                 }

           } catch (Exception e )

           {

                  e .printStackTrace();

           } finally

           {

                  if ( resultScanner != null )

                 {

                       resultScanner .close();

                 }

           }

           System. out .println( "selectAll end" );

      }

       public static void main(String[] args ) throws Exception

      {

           String tableName = "member3" ;

           String[] columns = new String[] { "column_A" , "column_B" };

            createTable ( tableName , columns );

           Map map = new HashMap();

            map .put( "column_A" , "AAA" );

            map .put( "column_B:1" , "b1" );

            map .put( "column_B:2" , "b2" );

            insert ( tableName , map );

           System. out .println( "---------------" );

            selectOne ( tableName , rowKey );

           System. out .println( "---------------" );

            selectAll ( tableName );

            //delete(tableName, rowKey);

            //dropTable(tableName);

      }

}

4.bug

1

2

5解决bug

bug1

解决方法

大多是你的hbase没有启动成功 

bug2

解决方法

打开linux 中的 /etc/hosts文件，更改

127.0.0.1       localhost

127.0.1.1       shi-virtual-machine

为

本机ip      shi-virtual-machine   

更改完成重新运行hbase

win10系统下找到

更改hosts文件  添加

  运行代码  ok!!!!!!!!