hbase的api操作

创建maven工程，修改jdk

pom文件里添加需要的jar包

dependencies>

<groupId>jdk.tools</groupId>

<artifactId>jdk.tools</artifactId>

<scope>system</scope>

<systemPath>${JAVA_HOME}/lib/tools.jar</systemPath>

</dependency>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

</dependency>

<groupId>org.apache.hbase</groupId>

<artifactId>hbase-it</artifactId>

</dependency>

<groupId>org.apache.hadoop</groupId>

<artifactId>hadoop-common</artifactId>

</dependency>

</dependencies>

import java.io.IOException;

import java.util.ArrayList;

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.hbase.Cell;

import org.apache.hadoop.hbase.CellUtil;

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.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 CreateTableTest {

    static Configuration conf = HBaseConfiguration.create();//读取hbase的配置文件

    static HBaseAdmin admin = null;//执行管理员

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

    admin=new HBaseAdmin(conf);

//    createTable();

//    listTable();

//    deleteTable();

//    listTable();

//    putData();

//    scanTable();

    getData();

//    putaLots();

}

//创建表

public static void createTable() throws Exception, IOException{

        //表的描述对象

        HTableDescriptor table=new HTableDescriptor(TableName.valueOf("javaemp1"));

        //列簇

        table.addFamily(new HColumnDescriptor("personal"));

        table.addFamily(new HColumnDescriptor("professional"));

        admin.createTable(table);

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

}

//列出所有的表

public static void listTable() throws IOException{

    HTableDescriptor[] Tablelist = admin.listTables();

    for(int i=0;i<Tablelist.length;i++)

    {

        System.out.println(Tablelist[i].getNameAsString());

    }

}

//删除表

public static void deleteTable() throws Exception{

    //删表之前先禁用表

//    admin.disableTable("javaemp1");

//    admin.deleteTable("javaemp1");

//    System.out.println("delete finished");

    //删除表中的某一列簇

//    admin.deleteColumn("javaemp","professional");

//    System.out.println("delete column");

    //增加一列

    admin.addColumn("javaemp",new HColumnDescriptor("professional"));

    System.out.println("add column");

}

//----------------------------------------------------------------------------------------------------------

//插入数据

public static void putData() throws Exception{

    //HTable类实现对单个表的操作，参数为：配置对象，表名

    HTable table = new HTable(conf,"javaemp");

    Put p = new Put(Bytes.toBytes("1001"));//实例化Put类，指定rwo key来操作

    Put p1=new Put(Bytes.toBytes("1002"));

    //

    p.add(Bytes.toBytes("personal"),Bytes.toBytes("name"),Bytes.toBytes("lalisa"));

//    参数：列簇，列，值

    p.add(Bytes.toBytes("personal"),Bytes.toBytes("city"),Bytes.toBytes("beijing"));

    table.put(p);

    p1.add(Bytes.toBytes("professional"),Bytes.toBytes("designation"),Bytes.toBytes("it"));

    p1.add(Bytes.toBytes("professional"),Bytes.toBytes("salary"),Bytes.toBytes("16010"));

    table.put(p1);

    System.out.println("put data finished");

    table.close();//释放HTable的资源

}

//批量插入数据

public static void putaLots() throws IOException{

    HTable table = new HTable(conf,"javaemp");

    ArrayList<Put> list = new ArrayList<Put>(10);

    for (int i=0;i<10;i++)

    {

        Put put = new Put(Bytes.toBytes("row"+i));

        put.add(Bytes.toBytes("personal"),Bytes.toBytes("name"),Bytes.toBytes("people"+i));

        list.add(put);

    }

    table.put(list);

    System.out.println("put list finished");

    }

//获取某一列数据

public static void getData() throws IOException{

    HTable table = new HTable(conf, "javaemp");

    Get get = new Get(Bytes.toBytes("1001"));//实例化Get类

    Result result = table.get(get);//获取这一row的数据

//    输出这一行的某一个字段

    byte[] value = result.getValue(Bytes.toBytes("personal"),Bytes.toBytes("name"));

    String  name=Bytes.toString(value);

    System.out.println("Name:"+name);

    //输出这一行的所有数据

    Cell[] cells = result.rawCells();

    for(Cell cell:cells)

    {

        System.out.print(Bytes.toString(CellUtil.cloneRow(cell))+"--");

        System.out.print(Bytes.toString(CellUtil.cloneFamily(cell))+":");

        System.out.print(Bytes.toString(CellUtil.cloneQualifier(cell))+"->");

        System.out.println(Bytes.toString(CellUtil.cloneValue(cell)));

    }

    table.close();//释放HTable的资源

}

//scan某一列

public static void scanTable() throws IOException{

    HTable table = new HTable(conf, "javaemp");

    Scan scan = new Scan();                    //    实例化Scan类

    scan.addColumn(Bytes.toBytes("personal"), Bytes.toBytes("name"));//scan某列簇的某列

    scan.addFamily(Bytes.toBytes("professional"));//scan某列簇

    ResultScanner scanner = table.getScanner(scan);

    for(Result res=scanner.next();res!=null;res=scanner.next())

    {

        System.out.println(res);

    }

    table.close();//释放HTable的资源

}

//统计row key的个数

public static void count(){

}

//关闭hbase

public  static void close() throws IOException{

    admin.shutdown();

}

}

package com.neworigin.Work;

import java.io.IOException;

import java.util.ArrayList;

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.hbase.Cell;

import org.apache.hadoop.hbase.CellUtil;

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.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 HbaseWork {

    static Configuration conf=HBaseConfiguration.create();

//    static Connection conn= ConnectionFactory.createConnection(conf);

    static HBaseAdmin admin=null;

public static void createTable() throws IOException{

    HTableDescriptor table=new HTableDescriptor(TableName.valueOf("member"));

    table.addFamily(new HColumnDescriptor("member_id"));

    table.addFamily(new HColumnDescriptor("address"));

    table.addFamily(new HColumnDescriptor("info"));

    admin.createTable(table);

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

}

public static void deletefamily() throws IOException{

//    HTableDescriptor table = new HTableDescriptor(TableName.valueOf("member"));

    admin.deleteColumn("member", "member_id");

    System.out.println("delete");

}

public static void insertdata() throws IOException{

    HTable table = new HTable(conf,"member");

    ArrayList<Put> list =new ArrayList<Put>(25);

    for(int i=0;i<5;i++)

    {

        Put put = new Put(Bytes.toBytes("row"+i));

        put.add(Bytes.toBytes("address"), Bytes.toBytes("province"), Bytes.toBytes("pr"+i));

        put.add(Bytes.toBytes("address"), Bytes.toBytes("city"), Bytes.toBytes("ct"+i));

        put.add(Bytes.toBytes("info"), Bytes.toBytes("age"), Bytes.toBytes("2"+i));

        put.add(Bytes.toBytes("info"), Bytes.toBytes("birthday"), Bytes.toBytes("data"+i));

        put.add(Bytes.toBytes("info"), Bytes.toBytes("company"), Bytes.toBytes("com"+i));

        list.add(put);

    }

    table.put(list);

}

public static void getinfo() throws IOException{

    HTable table = new HTable(conf, "member");

//    for(int i=0;i<5;i++)

//    {

//

//    }

    Get get = new Get(Bytes.toBytes(("row0")));

    Result result = table.get(get);

    for(Cell cell: result.rawCells())

    {

        System.out.print(Bytes.toString(CellUtil.cloneRow(cell))+"--");

        System.out.print(Bytes.toString(CellUtil.cloneFamily(cell))+":");

        System.out.print(Bytes.toString(CellUtil.cloneQualifier(cell))+"->");

        System.out.println(Bytes.toString(CellUtil.cloneValue(cell)));

    }

}

public static void alterfirstrow() throws IOException{

    HTable table = new HTable(conf, "member");

    Put put = new Put(Bytes.toBytes("row0"));

    put.add(Bytes.toBytes("info"), Bytes.toBytes("age"), Bytes.toBytes("30"));

    table.put(put);

}

public static void getage() throws IOException{

    HTable table = new HTable(conf,"member");

    Get get = new Get(Bytes.toBytes("row0"));

    Result result = table.get(get);

    byte[] bs = result.getValue(Bytes.toBytes("info"), Bytes.toBytes("age"));

    String age=Bytes.toString(bs);

    System.out.println("age:"+age);

}

public static void scanTable() throws IOException{

    Scan scan = new Scan();

    HTable table = new HTable(conf,"member");

    scan.addColumn(Bytes.toBytes("address"), Bytes.toBytes("province"));

    scan.addColumn(Bytes.toBytes("address"), Bytes.toBytes("city"));

    scan.addColumn(Bytes.toBytes("info"), Bytes.toBytes("age"));

    scan.addColumn(Bytes.toBytes("info"), Bytes.toBytes("birthday"));

    scan.addColumn(Bytes.toBytes("info"), Bytes.toBytes("company"));

    ResultScanner scanner = table.getScanner(scan);

    for(Result res=scanner.next();res!=null;res=scanner.next())

    {

        System.out.println(res);

    }

}

public static void countrow() throws IOException{

    HTable table = new HTable(conf,"member");

    Scan scan = new Scan();

    ResultScanner scanner = table.getScanner(scan);

    int i=0;

    while(scanner.next()!=null)

    {

        i++;

//        System.out.println(scanner.next());

    }

    System.out.println(i);

}

public static void delTable() throws IOException{

    boolean b = admin.isTableEnabled("member");

    if(b)

    {

        admin.disableTable("member");

    }

    admin.deleteTable("member");

}

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

    admin=new HBaseAdmin(conf);

//    createTable();

//    deletefamily();

//    insertdata();

//    alterfirstrow();

//    getinfo();

//    getage();

//    scanTable();

//    countrow();

    delTable();

}

}

hbase的api操作的更多相关文章

HBase伪分布式环境下，HBase的API操作，遇到的问题
在hadoop2.5.2伪分布式上,安装了hbase1.0.1.1的伪分布式利用HBase的API创建个testapi的表时,提示 Exception in thread "main&q ...
HBase学习之路（四）HBase的API操作
Eclipse环境搭建具体的jar的引入方式可以参考http://www.cnblogs.com/qingyunzong/p/8623309.html HBase API操作表和数据 import ...
HBase（五）HBase的API操作
一.项目环境搭建新建 Maven Project,新建项目后在 pom.xml 中添加依赖: <dependency> <groupId>org.apache.hbase&l ...
hbase的api操作之过滤器
Comparison Filter: 对比过滤器: 1.RowFilter select * from ns1:t1 where rowkey <= row100 ...
hbase的api操作之scan
扫描器缓存---------------- 面向行级别的. @Test public void getScanCache() throws IOException { Configu ...
Java API 操作HBase Shell
HBase Shell API 操作创建工程本实验的环境实在ubuntu18.04下完成,首先在改虚拟机中安装开发工具eclipse. 然后创建Java项目名字叫hbase-test 配置运行环境 ...
HBase 6、用Phoenix Java api操作HBase
开发环境准备:eclipse3.5.jdk1.7.window8.hadoop2.2.0.hbase0.98.0.2.phoenix4.3.0 1.从集群拷贝以下文件:core-site.xml.hb ...
HBase API操作
|的ascII最大ctrl+shift+t查找类 ctrl+p显示提示 HBase API操作依赖的jar包 <dependencies> <dependency> < ...
Hbase Shell命令详解+API操作
HBase Shell 操作 3.1 基本操作1．进入 HBase 客户端命令行,在hbase-2.1.3目录下 bin/hbase shell 2．查看帮助命令 hbase(main):001:0& ...

随机推荐

(转载)Unity里实现更换游戏对象材质球
在unity中本来想实现在一个背景墙上更换图片的功能在网上查了一些资料说是用Image,但我是新手小白刚接触Unity不久好多组建还不会用,就想能不能通过改变游戏对象的材质球来更换游戏对象的背景. ...
【Hadoop 分布式部署六：环境问题解决和集群基准测试】
环境问题: 出现Temporary failure in name resolutionp-senior-zuoyan.com 的原因有很多,主要就是主机没有解析到, 那就在hadoop的sl ...
Angular CLI命令
ng 基础命令 npm install –g @angular/cli npm install -g @angular/cli@latest ng serve –prot –aot 启动项目并压缩项目 ...
【二十八】xml编程(dom\xpath\simplexml)
1.xml基础概念作用范围: 作为程序通讯的标准. 作为配置文件. 作为小型数据库. xml语法: <根标签> <标签元素="元素值" ...>< ...
数据库备份出现警告：Warning: Using a password on the command line interface can be insecure. Warning: A partial dump from a server that has GTIDs will by default include the GTIDs of all transactions, even thos
1.先来看原备份数据库语句: mysqldump -h 127.0.0.1 -uroot -ppassword database > /usr/microStorage/dbbackup/cap ...
mybatis理解（0）
VC.时间（网页内容收集）
1.VC++获得当前系统时间的几种方案_记忆53秒_新浪博客.html(http://blog.sina.com.cn/s/blog_676271a60101i0hb.html) 1.1.内容保存: ...
[calss*="col-"]匹配类名中包含col-的类名,^以col-开头,$以col-结尾
[class*= col-] 代表包含 col- 的类名 , 例 col-md-4 ,demo-col-2(这个是虚构的)等都可以匹配到. [class^=col-] 代表以 col- 开头 ...
leecode第二十一题（合并两个有序链表）
/** * Definition for singly-linked list. * struct ListNode { * int val; * ListNode *next; * ListNode ...
JS添加/移除事件
事件的传播方式 <div id="father"> <div id="son"></div> </div> &l ...

hbase的api操作

hbase的api操作的更多相关文章

随机推荐

热门专题