public class StreamWordCount {  
    public static void main(String[] args) throws Exception {

        // 创建流处理执行环境
        StreamExecutionEnvironment env = StreamContextEnvironment.getExecutionEnvironment();

        // 从socket文本流读取数据
        DataStream<String> inputDataStream = env.socketTextStream("localhost", 7777);

        // 基于数据流进行转换计算
        DataStream<Tuple2<String,Integer>> resultStream = inputDataStream.flatMap(new WordCount.MyFlatMapper())
                .keyBy(0)
                .sum(1);

        resultStream.print();

        // 执行任务
        env.execute();
    }
}