Hbase CRUD Operations(Java API)

 Put Method

void put(Put put)throws IOException

 Put的构造方法

Put(byte[] row)
Put(byte[] row,RowLock rowLock)
Put(byte[] row,long ts)
Put(byte[] row,long ts,RowLock rowLock)

 add()

Put add(byte[] family,byte[] qualifier,byte[] value)
Put add(byte[] family,byte[] qualifier,long ts,byte[]
value)
Put add(KeyValue kv)throws IOException

 Each call to add() specifies exactly one column,or,in combination with an optional timestamp,one single cell.

原子操作

boolean checkAndPut(Bytes.toBytes("item"), Bytes.toBytes("happy"),
				Bytes.toBytes("live"), null, put1)

delete()

void delete(Delete delete)throws IOException

Delete(byte[] row)
Delete(byte[] row,long timestamp,RowLock rowLock)

原子操作

boolean checkAndDelete(byte[] row,byte[] family,byte[]
qualifier,byte[] value,Delete delete)throws IOException

Delete deleteFamily(byte[] family)
Delete deleteFamily(byte[] family,long timestamp)//the timestamp matches the same and all older versions of all columns
Delete deleteColumns(byte[] family,byte[] qualifier)
Delete deleteColumns(byte[] family,byte[] qualifier,long
timestamp)
Delete deleteColumn(byte[] family,byte[] qualifier)
Delete deleteColumn(byte[] family,byte[] qualifier,long
timestamp)
void setTimestamp(long timestamp)

get()

List<KeyValue> get(byte[] family,byte[] qualifier)

Map<byte[] ,List<KeyValue>>getFamilyMap()

Get addFamily(byte[] family)
Get addColumn(byte[] family,byte[] qualifier)
Get setTimeRange(long minStamp,long maxStamp)throws
IOException
Get setTimeStamp(long timestamp)
Get setMaxVersions()
Get setMaxVersions(int maxVersions)throws IOException

has()

boolean has(byte[]family,byte[] qualifier)
boolean has(byte[]family,byte[] qualifier,long ts)
boolean has(byte[]family,byte[] qualifier,byte[] value)
boolean has(byte[]family,byte[] qualifier,long ts,byte[] value)

Example

public class PutExample{
public static void main(String[] args)throws IOException
{
Configuration conf= HBaseConfiguration.create();//hbase-default.xml and hbase-site.xml
HTable table= newHTable(conf,"testtable");
Put put= new Put(Bytes.toBytes("row1"));
//org.apache.hadoop.hbase.util.Bytes
put.add(Bytes.toBytes("colfam1"),
Bytes.toBytes("qual1"),
Bytes.toBytes("val1"));
put.add(Bytes.toBytes("colfam1"),
Bytes.toBytes("qual2"),
Bytes.toBytes("val2"));
table.put(put);
}
}