创建flink流式环境

public static StreamExecutionEnvironment getStreamEnv(Integer port,String appName){
    // 添加webUI的客户端
    // TODO 1 创建流环境
    Configuration conf = new Configuration();
    conf.setInteger(RestOptions.PORT,port);
    StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(conf);

    // TODO 2 设置检查点和状态后端
    env.enableCheckpointing(10*1000L);
    // 设置相邻的两个检查点最小的时间间隔
    env.getCheckpointConfig().setMinPauseBetweenCheckpoints(10*1000L);
    env.getCheckpointConfig().setExternalizedCheckpointCleanup(CheckpointConfig.ExternalizedCheckpointCleanup.DELETE_ON_CANCELLATION);
    // 设置状态后端
    env.setStateBackend(new HashMapStateBackend());

    env.getCheckpointConfig().setCheckpointStorage(FinancialLeaseCommon.HDFS_URI_PREFIX+appName);

    System.setProperty("HADOOP_USER_NAME",FinancialLeaseCommon.HADOOP_USER_NAME);

    return env;

}