大数据开发phoenix连接hbase流程详解

一、安装phoennix添加配置

1、将phoenix-server-hbase-2.4-5.1.2.jar拷贝至hbase的的lib下

cp  phoenix-server-hbase-2.4-5.1.2.jar ../hbase/lib/

2、配置phoenix可以访问hbase的系统表

（1）将以下配置添加至hbase-site.xml中

   <property>
      <name>phoenix.schema.isNamespaceMappingEnabled</name>
      <value>true</value>
   </property>
    <property>
        <name>phoenix.schema.mapSystemTablesToNamespace</name>
        <value>true</value>
    </property>

（2）将hbase-stie.xml拷贝到phoenix/bin目录下

cp ../hbase/conf/hbase-site.xml   ../phoenix/bin/

二、启动phoenix服务

1、启动hbase

../hbase/bin/start-hbase.sh

2、启动phoenix

python3  ../phoenix/bin/sqlline.py   server200:2181

server200:2181为zookeeper地址

三、phoenix常用语法

 官网文档   https://phoenix.apache.org/language/index.html

(1)创建表

create table test1(id varchar primary key,a varchar,b varchar);

id主键可视为hbase的rowkey

​

(2)插入数据

upsert into TEST1 values('202211160089','liuping','chenyingying');

（3） 查询数据

select * from TEST1;

(4)视图/表映射

由于phoenix 无法直接访问hbase创建的非系统表，可以通过视图/表映射对非系统表进行查询，但视图不可修改，表映射可读可写

在hbase上创建表名为eftb列族为fm1 、fm2的表

create 'reftb','fm1','fm2'

向表中添加数据

 put 'reftb','010101','fm1:name','zhangsan'
 put 'reftb','010101','fm2:age','九千岁'

<1>视图映射

create view "reftb"(id varchar primary key,"fm1"."name" varchar,"fm2"."age" varchar);

<2>表映射

create table "reftb"(id varchar primary key,"fm1"."name" varchar,"fm2"."age" varchar);

<3>查看数据

（5）添加修改数据（增改语法相同）

 upsert into "reftb"  values('010102','诸葛村夫','五十');
 upsert into "reftb"  values('010101','常山赵子龙','七十');

（6）删除数据

delete from "reftb" where ID='010101';

（7）创建schema(数据库名，对用hbase是的namespace)

CREATE SCHEMA IF NOT EXISTS "my_schema";

四、java代码集成phoenix

1、添加依赖

implementation 'org.apache.phoenix:phoenix-client-hbase-2.4:5.1.2'

2、编写代码

public class PhoenixJdbcUtils {
    private final static Logger LOGGER = LoggerFactory.getLogger(PhoenixJdbcUtils.class);
    private static   Connection connection;
    static {
        Properties properties =new Properties();
        PhoenixDriver instance = PhoenixDriver.INSTANCE;
        try {
            connection = instance.connect("jdbc:phoenix:server200:2181", properties);
            ///connection = DriverManager.getConnection("jdbc:phoenix:server200:2181", properties);
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
    /**
     * 插入数据
     * @throws SQLException
     */
    public static   void  testUpsertData() throws SQLException {
        PreparedStatement psUpsert = connection.prepareStatement( " upsert  into \"reftb\" values('168936','刘备','63')");
        boolean addData = psUpsert.execute();
        LOGGER.info("addData---------"+addData);
        connection.commit();
    }
    /**
     * 查询数据
     * @throws SQLException
     */
    public static void  testQueryData() throws SQLException {
        PreparedStatement psQuery = connection.prepareStatement(" select  *  from  \"reftb\" ");
        ResultSet resultSet = psQuery.executeQuery();
        while (resultSet.next()) {
            LOGGER.info("id--{}",resultSet.getString(1));
            LOGGER.info("name--{}",resultSet.getString(2));
            LOGGER.info("age--{}",resultSet.getString(3));
        }
    }
    public static void main(String[] args) {
        try {
            testQueryData();
            testUpsertData();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}