订单管理系统的甘特图的uml代码

以下是一个简单的订单管理系统甘特图的UML代码：

@startuml

title 订单管理系统甘特图

Project starts on 2022/01/01
Project ends on 2022/06/01

== 阶段1：需求分析 ==

[确定需求] as A
[编写需求文档] as B
[审核需求文档] as C

A starts on 2022/01/01
A ends on 2022/01/31

B starts on 2022/02/01
B ends on 2022/03/15

C starts on 2022/03/16
C ends on 2022/03/31

== 阶段2：设计开发 ==

[设计数据库] as D
[编写程序] as E
[测试程序] as F

D starts on 2022/04/01
D ends on 2022/04/30

E starts on 2022/05/01
E ends on 2022/05/31

F starts on 2022/06/01
F ends on 2022/06/15

== 阶段3：上线运行 ==

[部署程序] as G
[用户培训] as H
[正式上线] as I

G starts on 2022/06/16
G ends on 2022/06/30

H starts on 2022/07/01
H ends on 2022/07/15

I starts on 2022/07/16
I ends on 2022/07/31

@enduml

以上代码描述了一个包含三个阶段的订单管理系统的甘特图。每个阶段包含一些具体的任务和时间范围。这个甘特图可以帮助项目管理人员了解整个项目的进度和进展情况。