问题描述
您应该在Result上使用getColumnCells来获取所有版本（取决于您在Get中设置的MAX_VERSION_COUNT个）。getValue返回最新值。
样例代码：
List<Cell> values = result.getColumnCells(Bytes.toBytes(family), Bytes.toBytes(qualifier));
for ( Cell cell : values )
{
System.out.println( Bytes.toString( CellUtil.cloneValue( cell ) ) );
}
解决方法
如何使用Get.setMaxVersions（10）方法返回HBase单元的所有带时间戳的版本，其中10是任意数字（可能是20或5之类的东西）？以下是控制台的主要方法，该方法创建一个表，插入10个随机整数，然后尝试检索所有整数以打印出来。
public static void main(String[] args)
throws ZooKeeperConnectionException,MasterNotRunningException,IOException,InterruptedException {
final String HBASE_ZOOKEEPER_QUORUM_IP = "localhost.localdomain"; //set ip in hosts file
final String HBASE_ZOOKEEPER_PROPERTY_CLIENTPORT = "2181";
final String HBASE_MASTER = HBASE_ZOOKEEPER_QUORUM_IP + ":60010";
//identify a data cell with these properties
String tablename = "characters";
String row = "johnsmith";
String family = "capital";
String qualifier = "A";
//config
Configuration config = HBaseConfiguration.create();
config.clear();
config.set("hbase.zookeeper.quorum",HBASE_ZOOKEEPER_QUORUM_IP);
config.set("hbase.zookeeper.property.clientPort",HBASE_ZOOKEEPER_PROPERTY_CLIENTPORT);
config.set("hbase.master",HBASE_MASTER);
//admin
HBaseAdmin hba = new HBaseAdmin(config);
//create a table
HTableDescriptor descriptor = new HTableDescriptor(tablename);
descriptor.addFamily(new HColumnDescriptor(family));
hba.createTable(descriptor);
hba.close();
//get the table
HTable htable = new HTable(config,tablename);
//insert 10 different timestamps into 1 record
for(int i = 0; i < 10; i++) {
String value = Integer.toString(i);
Put put = new Put(Bytes.toBytes(row));
put.add(Bytes.toBytes(family),Bytes.toBytes(qualifier),System.currentTimeMillis(),Bytes.toBytes(value));
htable.put(put);
Thread.sleep(200); //make sure each timestamp is different
}
//get 10 timestamp versions of 1 record
final int MAX_VERSIONS = 10;
Get get = new Get(Bytes.toBytes(row));
get.setMaxVersions(MAX_VERSIONS);
Result result = htable.get(get);
byte[] value = result.getValue(Bytes.toBytes(family),Bytes.toBytes(qualifier)); // returns MAX_VERSIONS quantity of values
String output = Bytes.toString(value);
//show me what you got
System.out.println(output); //prints 9 instead of 0 through 9
}
输出为9（因为循环在i = 9处结束，并且在Hue的HBase Browser Web
UI中看不到多个版本。我该怎么做以修复版本，以便为0-9而不是10给出单独的结果）数字9的一项结果？