fix doc

maven/src/main/java/com/duanledexianxianxian/maven/flink/StreamingJob.java

@@ -35,7 +35,7 @@ import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
 public class StreamingJob {
 
 	public static void main(String[] args) throws Exception {
-		// set up the streaming execution environment
+		// 创建执行环境上下文
 		final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
 
 		/*
@@ -58,6 +58,7 @@ public class StreamingJob {
 		 *
 		 */
 
+
 		// execute program
 		env.execute("Flink Streaming Java API Skeleton");
 	}