public static void main(String[] args) throws IOException {
Configuration conf = HBaseConfiguration.create();
HTableInterface literaturesTable = new HTable(conf, "pb_literatures");
Scan s = new Scan();
s.addFamily(Bytes.toBytes("info"));
ResultScanner rs = literaturesTable.getScanner(s);
for (Result r : rs) {
byte[] b = r.getValue(Bytes.toBytes("info"), Bytes.toBytes("title"));
System.out.println(Bytes.toString(b));
}
}
/** Return the number of rows in the given table. */
public static int countMobRows(final Table table, final byte[]... families) throws IOException {
Scan scan = new Scan();
for (byte[] family : families) {
scan.addFamily(family);
}
ResultScanner results = table.getScanner(scan);
int count = 0;
for (Result res : results) {
count++;
List<Cell> cells = res.listCells();
for (Cell cell : cells) {
// Verify the value
Assert.assertTrue(CellUtil.cloneValue(cell).length > 0);
}
}
results.close();
return count;
}
public void scan(
Consumer<Result> callback, String tableName, String columnFamily, String... qualifiers) {
if (callback != null && tableName != null && columnFamily != null && qualifiers != null) {
Scan s = new Scan();
byte[] family = Bytes.toBytes(columnFamily);
for (String qualifier : qualifiers) {
s.addColumn(family, Bytes.toBytes(qualifier));
}
try {
final Table table = connection.getTable(TableName.valueOf(tableName));
ResultScanner scanner = table.getScanner(s);
for (Result r = scanner.next(); r != null; r = scanner.next()) {
callback.accept(r);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
