Java hbase 表根据时间戳范围进行查询
时间: 2023-08-11 08:04:44 浏览: 104
在Java中,可以使用HBase API进行表根据时间戳范围进行查询。下面是一个简单的示例代码:
```java
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
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.filter.FilterList;
import org.apache.hadoop.hbase.filter.SingleColumnValueFilter;
import org.apache.hadoop.hbase.filter.TimestampsFilter;
import org.apache.hadoop.hbase.util.Bytes;
public class HBaseQueryExample {
public static void main(String[] args) throws IOException {
Configuration conf = HBaseConfiguration.create();
Connection conn = ConnectionFactory.createConnection(conf);
TableName tableName = TableName.valueOf("table_name");
Scan scan = new Scan();
long startTime = System.currentTimeMillis() - 24 * 60 * 60 * 1000; // start time is 24 hours ago
long endTime = System.currentTimeMillis(); // end time is current time
List<Long> timestamps = new ArrayList<>();
timestamps.add(startTime);
timestamps.add(endTime);
TimestampsFilter filter = new TimestampsFilter(timestamps);
SingleColumnValueFilter columnFilter = new SingleColumnValueFilter(Bytes.toBytes("column_family"),
Bytes.toBytes("column_qualifier"), CompareOperator.EQUAL, Bytes.toBytes("column_value"));
FilterList filterList = new FilterList(FilterList.Operator.MUST_PASS_ALL);
filterList.addFilter(filter);
filterList.addFilter(columnFilter);
scan.setFilter(filterList);
ResultScanner scanner = conn.getTable(tableName).getScanner(scan);
for (Result result : scanner) {
for (Cell cell : result.listCells()) {
byte[] valueBytes = CellUtil.cloneValue(cell);
String value = Bytes.toString(valueBytes);
System.out.println("Value: " + value);
}
}
scanner.close();
conn.close();
}
}
```
在上面的代码中,我们首先创建了一个HBase连接和一个表名。然后,我们使用Scan对象创建一个查询,并设置起始时间和结束时间。接下来,我们使用TimestampsFilter和SingleColumnValueFilter创建一个过滤器列表FilterList,以仅返回指定时间范围内的包含指定列的行。最后,我们使用ResultScanner遍历结果并打印每个包含指定列的单元格的值。
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