idea连接HBase IDEA远程连接HBase及其Java API实战详解（idea连接hbase实验目的）

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wget http://archive.apache.org/dist/hbase/1.3.2/hbase-1.3.2-bin.tar.gz
tar -zxvf hbase-1.3.2-bin.tar.gz #解压
mv hbase-1.3.2-bin /urs/local/hbase

cd /usr/local/hbase/conf
vi hbase-site.xml

<property>
        <name>hbase.cluster.distributed</name>
        <value>true</value>
    </property>
    <property>
        <name>hbase.rootdir</name>
        <value>/hbase-data</value>
    </property>
    <property>
        <name>hbase.zookeeper.quorum</name>
        <value>master:2181</value>
    </property>

cd /usr/local/hbase/conf
echo $JAVA_HOME #若没有安装jdk可百度（偷懒）
vi hbase-env.sh #添加要一致
export JAVA_HOME=/usr/local/java

cd /usr/local/hbase/bin
./start-hbase.sh

<dependency>
            <groupId>org.apache.hbase</groupId>
            <artifactId>hbase-server</artifactId>
            <version>1.3.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.hbase</groupId>
            <artifactId>hbase-client</artifactId>
            <version>1.3.2</version>
        </dependency>

log4j.rootLogger=debug, stdout, R

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

log4j.appender.stdout.layout.ConversionPattern=%5p - %m%n

log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=firestorm.log

log4j.appender.R.MaxFileSize=100KB
log4j.appender.R.MaxBackupIndex=1

log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n

log4j.logger.com.codefutures=DEBUG

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl" rel="external nofollow" ?>
<configuration>
    <property>
        <name>hbase.cluster.distributed</name>
        <value>true</value>
    </property>
    <property>
        <name>hbase.rootdir</name>
        <value>/hbase-data</value>
    </property>
    <property>
        <name>hbase.zookeeper.quorum</name>
        <value>master:2181</value>
    </property>
</configuration>

package ex3;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.*;

import java.io.IOException;

public class HbaseCRUD {
    private static Configuration configuration;
    private static Connection connection;
    private static Admin admin;

    /**
     * 建立连接
     */
    public static void init(){
        configuration=HBaseConfiguration.create();
        configuration.set("hbase.zookeeper.quorum","121.36.240.205"); // 换成你自己的IP
        configuration.set("hbase.zookeeper.property.clientPort","2181");
        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();
        }catch (IOException e){
            e.printStackTrace();
        }
    }
    /**
     * 创建表
     * @param myTableName 表名
     * @param colFamily 列族数组
     * @throws IOException
     */
    public static void createTable(String myTableName,String[]colFamily)throws IOException{
        TableName tablename = TableName.valueOf(myTableName);
        if(admin.tableExists(tablename)){
            System.out.println("表名已存在！");
        }
        else{
            HTableDescriptor hTableDescriptor = new HTableDescriptor(tablename);
            for(String str:colFamily){  //增加一列
                HColumnDescriptor hColumnDescriptor = new HColumnDescriptor(str);
                hTableDescriptor.addFamily(hColumnDescriptor);
            }
            admin.createTable(hTableDescriptor); //建表
        }
    }

    /**
     * 添加数据
     * @param tablename 表名
     * @param rowKey 行键
     * @param colFamily 列族
     * @param col 列限定符
     * @param val 数据
     * @throws IOException
     */
    public static void insertData(String tablename,String rowKey,String colFamily,String col,String val)throws IOException{
        Table table = connection.getTable(TableName.valueOf(tablename));//获取表名
        Put put = new Put(rowKey.getBytes());
        put.addColumn(colFamily.getBytes(),col.getBytes(),val.getBytes());
        table.put(put);
        table.close();
    }

    /**
     * 获取数据
     * @param tablename 表名
     * @param rowKey 行键
     * @param colFamily 列族
     * @param col 列限定符
     * @throws IOException
     */
    public static void getData(String tablename,String rowKey,String colFamily,String col)throws IOException{
        Table table = connection.getTable(TableName.valueOf(tablename));
        Get get = new Get(rowKey.getBytes());
        get.addColumn(colFamily.getBytes(),col.getBytes());
        Result result = table.get(get);
        String val = new String(result.getValue(colFamily.getBytes(),col==null?null:col.getBytes()));
        System.out.println("值为："+val);
        table.close();
    }
}

package ex3;

import org.apache.log4j.BasicConfigurator;

import java.io.IOException;

public class Client {
    public static void main(String[] args) throws IOException {
        HbaseCRUD.init();
        //建表
        HbaseCRUD.createTable("student",new String[]{"score"});
        //插入数据
        HbaseCRUD.insertData("student","lisa","score","Java","85");
        HbaseCRUD.insertData("student","lisa","score","C/C++","80");
        HbaseCRUD.insertData("student","lisa","score","MySQL","82");
        HbaseCRUD.insertData("student","jerry","score","Java","65");
        //查询数据
        HbaseCRUD.getData("student","lisa","score","Java");
        HbaseCRUD.getData("student","lisa","score","MySQL");
        HbaseCRUD.getData("student","jerry","score","Java");
        HbaseCRUD.close();
        System.out.println("记得一键三连~");
    }
}