讀取及列印 (HBase)

讀取及列印資料列。

程式碼範例

Java

如要瞭解如何安裝及使用 Bigtable 的用戶端程式庫，請參閱這篇文章。

如要向 Bigtable 進行驗證，請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。

import com.google.cloud.bigtable.hbase.BigtableConfiguration;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.filter.CompareFilter.CompareOp;
import org.apache.hadoop.hbase.filter.Filter;
import org.apache.hadoop.hbase.filter.MultiRowRangeFilter;
import org.apache.hadoop.hbase.filter.MultiRowRangeFilter.RowRange;
import org.apache.hadoop.hbase.filter.RegexStringComparator;
import org.apache.hadoop.hbase.filter.ValueFilter;
import org.apache.hadoop.hbase.util.Bytes;

public class Reads {

  // Write your code here.
  // ...

  private static void printRow(Result row) {
    System.out.printf("Reading data for %s%n", Bytes.toString(row.rawCells()[0].getRowArray()));
    String colFamily = "";
    for (Cell cell : row.rawCells()) {
      String currentFamily = Bytes.toString(cell.getFamilyArray());
      if (!currentFamily.equals(colFamily)) {
        colFamily = currentFamily;
        System.out.printf("Column Family %s%n", colFamily);
      }
      System.out.printf(
          "\t%s: %s @%s%n",
          Bytes.toString(cell.getQualifierArray()),
          Bytes.toString(cell.getValueArray()),
          cell.getTimestamp());
    }
    System.out.println();
  }
}

後續步驟

如要搜尋及篩選其他 Google Cloud 產品的程式碼範例，請參閱Google Cloud 範例瀏覽器。