01.先查看HBase中表

(base) [root@192 ~]# hbase shell
HBase Shell
Use "help" to get list of supported commands.
Use "exit" to quit this interactive shell.
For Reference, please visit: http://hbase.apache.org/2.0/book.html#shell
Version 2.1.1, rb60a92d6864ef27295027f5961cb46f9162d7637, Fri Oct 26 19:27:03 PDT 2018
Took 0.0017 seconds
hbase(main):001:0> list
TABLE
Gadaite
STUDENT
SYSTEM.CATALOG
SYSTEM.CHILD_LINK
SYSTEM.FUNCTION
SYSTEM.LOG
SYSTEM.MUTEX
SYSTEM.SEQUENCE
SYSTEM.STATS
SYSTEM.TASK
StudentAndCourse
11 row(s)
Took 0.2929 seconds
=> ["Gadaite", "STUDENT", "SYSTEM.CATALOG", "SYSTEM.CHILD_LINK", "SYSTEM.FUNCTION", "SYSTEM.LOG", "SYSTEM.MUTEX", "SYSTEM.SEQUENCE", "SYSTEM.STATS", "SYSTEM.TASK", "StudentAndCourse"]
hbase(main):002:0>

02.使用Hadoop的HBaseApi创建表

2.1 方式一

? 该方式可能已经被启用

? Family：为列簇的意思

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;

public class CreateHbaseTable {
    public static void main(String[] args) throws Exception{
        Configuration conf = HBaseConfiguration.create();
        conf = HBaseConfiguration.create();
        conf.set("hbase.zookeeper.quorum", "192.168.1.10:2181");
        Connection con = ConnectionFactory.createConnection(conf);
        Admin admin = con.getAdmin();
        HTableDescriptor hTableDescriptor = new HTableDescriptor(TableName.valueOf("ideatest".getBytes()));
        HColumnDescriptor f1 = new HColumnDescriptor("F1");
        HColumnDescriptor f2 = new HColumnDescriptor("F2");
        f2.setVersions(1, 3);
        hTableDescriptor.addFamily(f1).addFamily(f2);
        admin.createTable(hTableDescriptor);
        admin.close();
        con.close();
    }
}

? 在hbase shell中查看结果：

? 生成新表：ideatest

hbase(main):002:0> list
TABLE
Gadaite
STUDENT
SYSTEM.CATALOG
SYSTEM.CHILD_LINK
SYSTEM.FUNCTION
SYSTEM.LOG
SYSTEM.MUTEX
SYSTEM.SEQUENCE
SYSTEM.STATS
SYSTEM.TASK
StudentAndCourse
ideatest
12 row(s)
Took 0.0138 seconds
=> ["Gadaite", "STUDENT", "SYSTEM.CATALOG", "SYSTEM.CHILD_LINK", "SYSTEM.FUNCTION", "SYSTEM.LOG", "SYSTEM.MUTEX", "SYSTEM.SEQUENCE", "SYSTEM.STATS", "SYSTEM.TASK", "StudentAndCourse", "ideatest"]

2.2 方式二：

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.util.Bytes;

public class CreateHbaseTable2 {
    public static void main(String[] args) throws Exception{
        Configuration conf = new Configuration();
        conf.set("hbase.zookeeper.quorum","192.168.1.10:2181");
        Connection conn = ConnectionFactory.createConnection(conf);
        Admin admin = conn.getAdmin();
        if(!admin.tableExists(TableName.valueOf("IDEATEST"))){
            TableName IDEATEST = TableName.valueOf("IDEATEST");
            //  表描述构造器
            TableDescriptorBuilder tableDescriptorBuilder = TableDescriptorBuilder.newBuilder(IDEATEST);
            //  列族描述器构造器
            ColumnFamilyDescriptorBuilder col1 = ColumnFamilyDescriptorBuilder.newBuilder(Bytes.toBytes("col1"));
            ColumnFamilyDescriptorBuilder col2 = ColumnFamilyDescriptorBuilder.newBuilder(Bytes.toBytes("col2"));
            //  列描述器
            ColumnFamilyDescriptor build1 = col1.build();
            ColumnFamilyDescriptor build2 = col2.build();
            //  添加列簇
            TableDescriptorBuilder builder = tableDescriptorBuilder.setColumnFamily(build1).setColumnFamily(build2);
            //  表描述器
            TableDescriptor tableDescriptor = builder.build();
            //  创建表
            admin.createTable(tableDescriptor);
        }
        else {
            System.out.println("表已存在");
        }
        admin.close();
        conn.close();
    }
}

? 在Hbase shell中查看结果

? 已生成IDEATEST表

hbase(main):004:0> list
TABLE
Gadaite
IDEATEST
STUDENT
SYSTEM.CATALOG
SYSTEM.CHILD_LINK
SYSTEM.FUNCTION
SYSTEM.LOG
SYSTEM.MUTEX
SYSTEM.SEQUENCE
SYSTEM.STATS
SYSTEM.TASK
StudentAndCourse
ideatest
13 row(s)
Took 0.0129 seconds
=> ["Gadaite", "IDEATEST", "STUDENT", "SYSTEM.CATALOG", "SYSTEM.CHILD_LINK", "SYSTEM.FUNCTION", "SYSTEM.LOG", "SYSTEM.MUTEX", "SYSTEM.SEQUENCE", "SYSTEM.STATS", "SYSTEM.TASK", "StudentAndCourse", "ideatest"]

03.在hbase shell中删除表

? 不是直接使用下面的方式删除整个表

hbase(main):005:0> drop "ideatest"

ERROR: Table ideatest is enabled. Disable it first.

For usage try 'help "drop"'

Took 0.0283 seconds
hbase(main):006:0> drop table "ideatest"
NoMethodError: undefined method `table' for main:Object

3.1 先将表设定为无效状态

disable "ideatest"

3.2 判断表是否无效

is_disabled "ideatest"

3.3 查看结果

? ideatest表已经被删除

hbase(main):007:0> disable "ideatest"
Took 0.4582 seconds
hbase(main):008:0> is_disabled "ideatest"
true
Took 0.0067 seconds
=> 1
hbase(main):009:0> drop "ideatest"
Took 0.2399 seconds
hbase(main):010:0> list
TABLE
Gadaite
IDEATEST
STUDENT
SYSTEM.CATALOG
SYSTEM.CHILD_LINK
SYSTEM.FUNCTION
SYSTEM.LOG
SYSTEM.MUTEX
SYSTEM.SEQUENCE
SYSTEM.STATS
SYSTEM.TASK
StudentAndCourse
12 row(s)
Took 0.0098 seconds
=> ["Gadaite", "IDEATEST", "STUDENT", "SYSTEM.CATALOG", "SYSTEM.CHILD_LINK", "SYSTEM.FUNCTION", "SYSTEM.LOG", "SYSTEM.MUTEX", "SYSTEM.SEQUENCE", "SYSTEM.STATS", "SYSTEM.TASK", "StudentAndCourse"]