帮我写一段rowcount统计条数的hbase表条数的代码
时间: 2024-03-27 12:39:29 浏览: 42
当你使用HBase表时,可以使用以下Java代码来获得表中的行数:
```java
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.filter.Filter;
import org.apache.hadoop.hbase.filter.FirstKeyOnlyFilter;
import org.apache.hadoop.hbase.util.Bytes;
public class HBaseRowCount {
public static void main(String[] args) throws Exception {
Configuration conf = HBaseConfiguration.create();
Connection conn = ConnectionFactory.createConnection(conf);
TableName tableName = TableName.valueOf("tableName");
Table table = conn.getTable(tableName);
Filter filter = new FirstKeyOnlyFilter();
Scan scan = new Scan();
scan.setFilter(filter);
ResultScanner resultScanner = table.getScanner(scan);
int rowCount = 0;
for (Result result : resultScanner) {
rowCount++;
}
System.out.println("Row count: " + rowCount);
resultScanner.close();
table.close();
conn.close();
}
}
```
请将代码中的“tableName”替换为您要计算行数的表的名称。运行此代码将输出表中的行数。
阅读全文