大数据开发phoenix连接hbase流程详解


    目录
  • 一、安装phoennix添加配置
  • 二、启动phoenix服务
  • 三、phoenix常用语法
  • 四、java代码集成phoenix

    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();
        }
    }
}

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