Warning: file_get_contents(/data/phpspider/zhask/data//catemap/9/java/316.json): failed to open stream: No such file or directory in /data/phpspider/zhask/libs/function.php on line 167

Warning: Invalid argument supplied for foreach() in /data/phpspider/zhask/libs/tag.function.php on line 1116

Notice: Undefined index: in /data/phpspider/zhask/libs/function.php on line 180

Warning: array_chunk() expects parameter 1 to be array, null given in /data/phpspider/zhask/libs/function.php on line 181

Warning: file_get_contents(/data/phpspider/zhask/data//catemap/0/hadoop/6.json): failed to open stream: No such file or directory in /data/phpspider/zhask/libs/function.php on line 167

Warning: Invalid argument supplied for foreach() in /data/phpspider/zhask/libs/tag.function.php on line 1116

Notice: Undefined index: in /data/phpspider/zhask/libs/function.php on line 180

Warning: array_chunk() expects parameter 1 to be array, null given in /data/phpspider/zhask/libs/function.php on line 181
Java 获取行HBase的特定列族中的列_Java_Hadoop_Hbase - Fatal编程技术网

Java 获取行HBase的特定列族中的列

Java 获取行HBase的特定列族中的列,java,hadoop,hbase,Java,Hadoop,Hbase,我正在编写一个应用程序,通过JSP在HBase的特定表中显示数据。我想获取行的特定列族中的所有列 有什么办法可以这样做吗 public String[]getColumnsInColumnFamily(结果r,字符串ColumnFamily) public String[] getColumnsInColumnFamily(Result r, String ColumnFamily) { NavigableMap<byte[], byte[]> familyMap =

我正在编写一个应用程序,通过JSP在HBase的特定表中显示数据。我想获取行的特定列族中的所有列

有什么办法可以这样做吗

public String[]getColumnsInColumnFamily(结果r,字符串ColumnFamily)
public String[] getColumnsInColumnFamily(Result r, String ColumnFamily)
{

      NavigableMap<byte[], byte[]> familyMap = r.getFamilyMap(Bytes.toBytes(ColumnFamily));
      String[] Quantifers = new String[familyMap.size()];

      int counter = 0;
      for(byte[] bQunitifer : familyMap.keySet())
      {
          Quantifers[counter++] = Bytes.toString(bQunitifer);

      }

      return Quantifers;
}
{ NavigableMap familyMap=r.getFamilyMap(Bytes.toBytes(ColumnFamily)); String[]Quantifers=新字符串[familyMap.size()]; int计数器=0; 对于(字节[]bkunifer:familyMap.keySet()) { 量化器[计数器++]=字节.toString(bQunitifer); } 返回量化器; }

结果r是理想的行。

如果您只对单个系列感兴趣,可以将扫描仪设置为仅获取该系列

    Scan scan = new Scan(Bytes.toBytes(startKey),Bytes.toBytes(endKey);
    scan.addFamily(Bytes.toBytes(familyName));

我得出一个答案,如果你有其他的解决办法,请给我建议。for(Result rr=scanner.next();rr!=null;rr=scanner.next()){NavigableMap familyMap=rr.getFamilyMap(Bytes.toBytes(“Info”);byte[]y=(byte[])familyMap.firstEntry().getKey();System.out.println(Bytes.toString(y));}