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這篇文章主要講解了“Flink Union怎么將多個(gè)數(shù)據(jù)流合并成一個(gè)新的數(shù)據(jù)流”,文中的講解內(nèi)容簡單清晰,易于學(xué)習(xí)與理解,下面請(qǐng)大家跟著小編的思路慢慢深入,一起來研究和學(xué)習(xí)“Flink Union怎么將多個(gè)數(shù)據(jù)流合并成一個(gè)新的數(shù)據(jù)流”吧!
Union算子:將多個(gè)數(shù)據(jù)流合并成一個(gè)新的數(shù)據(jù)流(數(shù)據(jù)類型必需一致)
示例環(huán)境、
java.version: 1.8.x flink.version: 1.11.1
示例數(shù)據(jù)源 (項(xiàng)目碼云下載)
Flink 系例 之 搭建開發(fā)環(huán)境與數(shù)據(jù)
Union.java
import com.flink.examples.DataSource; import org.apache.flink.api.java.tuple.Tuple3; import org.apache.flink.streaming.api.datastream.DataStream; import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; import java.util.List; /** * @Description Union算子:將多個(gè)數(shù)據(jù)流合并成一個(gè)新的數(shù)據(jù)流(數(shù)據(jù)類型必需一致) */ public class Union { /** * 遍歷集合,合并多個(gè)流并打印 * @param args * @throws Exception */ public static void main(String[] args) throws Exception { final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(); List<Tuple3<String,String,Integer>> tuple3List = DataSource.getTuple3ToList(); //Datastream 1 DataStream<Tuple3<String,String,Integer>> dataStream1 = env.fromCollection(tuple3List); //Datastream 2 DataStream<Tuple3<String,String,Integer>> dataStream2 = env.fromCollection(tuple3List); //Datastream 3 DataStream<Tuple3<String,String,Integer>> dataStream = dataStream1.union(dataStream2); dataStream.print(); env.execute("flink Union job"); } }
打印結(jié)果
3> (王五,man,29) 2> (李四,girl,24) 3> (王五,man,29) 1> (張三,man,20) 1> (張三,man,20) 1> (伍七,girl,18) 1> (伍七,girl,18) 2> (吳八,man,30) 2> (李四,girl,24) 2> (吳八,man,30) 4> (劉六,girl,32) 4> (劉六,girl,32)
感謝各位的閱讀,以上就是“Flink Union怎么將多個(gè)數(shù)據(jù)流合并成一個(gè)新的數(shù)據(jù)流”的內(nèi)容了,經(jīng)過本文的學(xué)習(xí)后,相信大家對(duì)Flink Union怎么將多個(gè)數(shù)據(jù)流合并成一個(gè)新的數(shù)據(jù)流這一問題有了更深刻的體會(huì),具體使用情況還需要大家實(shí)踐驗(yàn)證。這里是億速云,小編將為大家推送更多相關(guān)知識(shí)點(diǎn)的文章,歡迎關(guān)注!
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