1.安装flink，启动flink

文档地址：Apache Flink 1.3-SNAPSHOT 中文文档: Apache Flink 中文文档

代码：GitHub - apache/flink: Apache Flink

2. 打开端口  端口号， 启动jar

### 切换到flink 目录bin下
[root@localhost ~]# cd /home/flink/flink-1.14.4/bin/
### 运行
[root@localhost bin]# ./start-cluster.sh###开启端口9000
nc -l  9000
#### 运行jar./bin/flink  run  /home/flink/flink-1.14.4/examples/streaming/SocketWindowWordCount.jar --port 9000

3.测试jar,输入字符