思维导图新功能测试

Mon, 30 Mar 2026 00:00:00 +0000

- 项目规划
- 前端
- 示例代码
```js
let a = 3
console.log(a)
```
- <h1 style="color: blue"> 你好 </h1>
- ![](https://an-img.oss-cn-hangzhou.aliyuncs.com/2026/03/30/20260330150145688.png,148,38)
- java 代码
```java
public class TimestampWatermarkDemo {
public static class Event {
public String user;
public long eventTime;
public int value;
public Event(){}
public Event(String user, long eventTime, int value) {
this.user = user;
this.eventTime = eventTime;
this.value = value;
}
public long getEventTime() {
return eventTime;
}
@Override
public String toString() {
return "Event{" +
"user='" + user + '\'' +
", eventTime=" + eventTime +
", value=" + value +
'}';
}
}
public static void main(String[] args) throws Exception {
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
DataStream<Event> source = env.fromElements(
new Event("alice", 1000L, 1),
new Event("alice", 4000L, 1),
new Event("alice", 3000L, 1),
new Event("bob", 8000L, 1),
new Event("alice", 12000L, 1)
);
WatermarkStrategy<Event> wmStrategy = WatermarkStrategy.<Event>forBoundedOutOfOrderness(Duration.ofSeconds(5))
.withTimestampAssigner((event, recordTimestamp) -> event.getEventTime());
DataStream<Event> withWaterMark = source.assignTimestampsAndWatermarks(wmStrategy);
withWaterMark.print();
env.execute("timestamp-water-mark-demo");
}
}
```
-

1

let a = 3

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思维导图新功能测试