例子
Flink集群
mvn package exec:java -Dexec.mainClass=org.apache.beam.examples.WordCount -Dexec.args="--runner=FlinkRunner --flinkMaster=<flink master> --filesToStage=target/word-count-beam-bundled-0.1.jar --inputFile=/path/to/quickstart/pom.xml --output=/tmp/counts" -Pflink-runnermvn package exec:java -Dexec.