一. shell命令
1. 进入hbase命令行 ./hbase shell
2. 显示hbase中的表 list 3. 创建user表,包括info、data两个列族 create 'user', 'info', 'data' create 'user', {NAME => 'info', VERSIONS => '3'}
4. 向表中插入信息:
向user表中插入信息。row key为rk0001。列族info中加入name列标示符,值为zhangsan put 'user', 'rk0001', 'info:name', 'zhangsan' 向user表中插入信息。row key为rk0001。列族info中加入gender列标示符,值为female put 'user', 'rk0001', 'info:gender', 'female' 向user表中插入信息。row key为rk0001,列族info中加入age列标示符。值为20 put 'user', 'rk0001', 'info:age', 20 向user表中插入信息,row key为rk0001,列族data中加入pic列标示符,值为picture put 'user', 'rk0001', 'data:pic', 'picture'
5. 获取表中的信息:
获取user表中row key为rk0001的全部信息 get 'user', 'rk0001' 获取user表中row key为rk0001,info列族的全部信息 get 'user', 'rk0001', 'info' 获取user表中row key为rk0001,info列族的name、age列标示符的信息 get 'user', 'rk0001', 'info:name', 'info:age' 获取user表中row key为rk0001,info、data列族的信息 get 'user', 'rk0001', 'info', 'data' get 'user', 'rk0001', {COLUMN => ['info', 'data']} get 'user', 'rk0001', {COLUMN => ['info:name', 'data:pic']} 获取user表中row key为rk0001,列族为info,版本最新5个的信息 get 'people', 'rk0002', {COLUMN => 'info', VERSIONS => 2} get 'user', 'rk0001', {COLUMN => 'info:name', VERSIONS => 5} get 'user', 'rk0001', {COLUMN => 'info:name', VERSIONS => 5, TIMERANGE => [1392368783980, 1392380169184]} 获取user表中row key为rk0001。cell的值为zhangsan的信息 get 'people', 'rk0001', {FILTER => "ValueFilter(=, 'binary:图片')"} 获取user表中row key为rk0001,列标示符中含有a的信息 get 'people', 'rk0001', {FILTER => "(QualifierFilter(=,'substring:a'))"} put 'user', 'rk0002', 'info:name', 'fanbingbing' put 'user', 'rk0002', 'info:gender', 'female' put 'user', 'rk0002', 'info:nationality', '中国' get 'user', 'rk0002', {FILTER => "ValueFilter(=, 'binary:中国')"}
6. 查询表中信息:
查询user表中的全部信息 scan 'user' 查询user表中列族为info的信息 scan 'people', {COLUMNS => 'info'} scan 'user', {COLUMNS => 'info', RAW => true, VERSIONS => 5} scan 'persion', {COLUMNS => 'info', RAW => true, VERSIONS => 3} 查询user表中列族为info和data的信息 scan 'user', {COLUMNS => ['info', 'data']} scan 'user', {COLUMNS => ['info:name', 'data:pic']} 查询user表中列族为info、列标示符为name的信息 scan 'user', {COLUMNS => 'info:name'} 查询user表中列族为info、列标示符为name的信息,而且版本号最新的5个 scan 'user', {COLUMNS => 'info:name', VERSIONS => 5} 查询user表中列族为info和data且列标示符中含有a字符的信息 scan 'people', {COLUMNS => ['info', 'data'], FILTER => "(QualifierFilter(=,'substring:a'))"} 查询user表中列族为info。rk范围是[rk0001, rk0003)的数据 scan 'people', {COLUMNS => 'info', STARTROW => 'rk0001', ENDROW => 'rk0003'} 查询user表中row key以rk字符开头的 scan 'user',{FILTER=>"PrefixFilter('rk')"} 查询user表中指定范围的数据 scan 'user', {TIMERANGE => [1392368783980, 1392380169184]} 7. 删除表中数据: 删除user表row key为rk0001,列标示符为info:name的数据delete 'people', 'rk0001', 'info:name'
删除user表row key为rk0001,列标示符为info:name。timestamp为1392383705316的数据 delete 'user', 'rk0001', 'info:name', 1392383705316 清空user表中的数据 truncate 'people'
8. 其它操作
改动表结构: 首先停用user表(新版本号不用) disable 'user' 加入两个列族f1和f2 alter 'people', NAME => 'f1'alter 'user', NAME => 'f2'
启用表enable 'user'
###disable 'user'(新版本号不用) 删除一个列族: alter 'user', NAME => 'f1', METHOD => 'delete' 或 alter 'user', 'delete' => 'f1' 加入列族f1同一时候删除列族f2 alter 'user', {NAME => 'f1'}, {NAME => 'f2', METHOD => 'delete'} 将user表的f1列族版本改为5 alter 'people', NAME => 'info', VERSIONS => 5 启用表 enable 'user' 删除表 disable 'user'drop 'user'
二. java接口
public class HbaseDemo { private Configuration conf = null; @Before public void init(){ conf = HBaseConfiguration.create(); conf.set("hbase.zookeeper.quorum", "hadoop01,hadoop02,hadoop03"); } @Test public void testDrop() throws Exception{ HBaseAdmin admin = new HBaseAdmin(conf); admin.disableTable("account"); admin.deleteTable("account"); admin.close(); } @Test public void testPut() throws Exception{ HTable table = new HTable(conf, "user"); Put put = new Put(Bytes.toBytes("rk0003")); put.add(Bytes.toBytes("info"), Bytes.toBytes("name"), Bytes.toBytes("liuyan")); table.put(put); table.close(); } @Test public void testGet() throws Exception{ HTable table = new HTable(conf, "user"); Get get = new Get(Bytes.toBytes("rk0001")); get.setMaxVersions(5); Result result = table.get(get); for(KeyValue kv : result.list()){ String family = new String(kv.getFamily()); String qualifier = new String(kv.getQualifier()); String value = new String(kv.getValue()); System.out.println("family: " + ", qualifier: " + qualifier + ", value: " + value); } table.close(); } @Test public void testScan() throws Exception{ HTablePool pool = new HTablePool(conf, 10); HTableInterface table = pool.getTable("user"); Scan scan = new Scan(Bytes.toBytes("rk0001"), Bytes.toBytes("rk0002")); scan.addFamily(Bytes.toBytes("info")); ResultScanner scanner = table.getScanner(scan); for(Result r : scanner){ byte[] value = r.getValue(Bytes.toBytes("info"), Bytes.toBytes("name")); System.out.println(new String(value)); } pool.close(); } @Test public void testDel() throws Exception{ HTable table = new HTable(conf, "user"); Delete del = new Delete(Bytes.toBytes("rk0001")); del.deleteColumn(Bytes.toBytes("data"), Bytes.toBytes("pic")); table.delete(del); table.close(); }}