Flink可以通过HBaseInputFormat来读取HBase表中的数据。以下是一个简单的示例代码:
import org.apache.flink.api.java.DataSet; import org.apache.flink.api.java.ExecutionEnvironment; import org.apache.flink.api.java.io.TextInputFormat; import org.apache.flink.api.java.tuple.Tuple2; import org.apache.flink.api.java.typeutils.TypeExtractor; import org.apache.hadoop.hbase.HBaseConfiguration; import org.apache.hadoop.hbase.client.Result; import org.apache.hadoop.hbase.io.ImmutableBytesWritable; import org.apache.hadoop.hbase.mapreduce.TableInputFormat; public class ReadHBaseData { public static void main(String[] args) throws Exception { final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment(); org.apache.hadoop.conf.Configuration configuration = HBaseConfiguration.create(); configuration.set(TableInputFormat.INPUT_TABLE, ""); DataSet > hbaseData = https://www.yisu.com/ask/env.createInput(new org.apache.hadoop.hbase.mapreduce.TableInputFormat<>( new TextInputFormat(), ImmutableBytesWritable.class, Result.class)); DataSet > mappedData = https://www.yisu.com/ask/hbaseData.map(value -> { String key = new String(value.f0.get()); String data = https://www.yisu.com/ask/value.f1.toString();>(key, data); }); mappedData.print(); } }
请确保在pom.xml文件中包含必要的Flink和HBase依赖项。您还需要将
替换为您要读取的HBase表的名称。