Flink 系例 之 Filter

Flink 系例 之 Filter

Filter算子：对数据流进行过滤，只返回为true的数据

示例环境

java.version: 1.8.x
flink.version: 1.11.1

示例数据源 （项目码云下载）

Flink 系例 之 搭建开发环境与数据

Fliter.java

import com.flink.examples.DataSource;
import org.apache.flink.api.common.functions.FilterFunction;
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;


public class Filter {
    
    public static void main(String[] args) throws Exception {
        final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        List> tuple3List = DataSource.getTuple3ToList();
        DataStream> dataStream = env.fromCollection(tuple3List).filter(new FilterFunction>() {
            @Override
            public boolean filter(Tuple3 tuple3) throws Exception {
                //性别（1男，2女）
                return tuple3.f1.equals("man");
            }
        });
        dataStream.print();
        env.execute("flink Filter job");
    }
}

 打印结果

4> (吴八,man,30)
3> (张三,man,20)
1> (王五,man,29)