plantuml:用例图 [IanGoo's Wiki]

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====== PlantUML用例图 ======

===== 定义 =====

==== 用例 ====

用例使用圆括号''()''包裹，也可以使用关键字''usecase''来定义用例，还可以用关键字''as''来定义Alias，这个Alias可以在以后定义关系的时候使用。

<WRAP group>
<WRAP half column>
<code>
@startuml
(First Usecase)
(Another Usecase) as (case2)
usecase case3
usecase (Last\nNewCase) as case4
@enduml
</code>
</WRAP>

<WRAP half column>
<uml>
@startuml
(First Usecase)
(Another Usecase) as (case2)
usecase case3
usecase (Last\nNewCase) as case4
@enduml
</uml>
</WRAP>
</WRAP>

用例描述若是要跨越多行，可以用双引号包裹，还可以使用分隔符：

^代码^描述^
|''--''|横线|
|''..''|虚线|
|''==''|双横线|
|''__''|下划线|

<WRAP group>
<WRAP half column>
<code>
@startuml

usecase UC1 as "You can use
several lines to define your usecase.
You can also use separators.
--
Several separators are possible.
==
And you can add titles:
..Conclusion..
This allows large description."

@enduml
</code>
</WRAP>

<WRAP half column>
<uml>
@startuml

usecase UC1 as "You can use
several lines to define your usecase.
You can also use separators.
--
Several separators are possible.
==
And you can add titles:
..Conclusion..
This allows large description."

@enduml
</uml>
</WRAP>
</WRAP>


==== 角色 ====

角色使用两个冒号'':''包裹，也可以使用关键字''actor''来定义，同样地，也可以使用''as''来定义Alias。

<WRAP group>
<WRAP half column>
<code>
@startuml
:First Actor:
:Another\nActor: as Man2
actor Woman3
actor :Last Actor: as Person1
@enduml
</code>
</WRAP>

<WRAP half column>
<uml>
@startuml
:First Actor:
:Another\nActor: as Man2
actor Woman3
actor :Last Actor: as Person1
@enduml
</uml>
</WRAP>
</WRAP>

角色的外观默认为火柴棍人，但是也可以更改成//用户头像//样式或者//透明人//样式：

<WRAP group>
<WRAP half column>
<code>
@startuml
:Default:
@enduml
@startuml
skinparam actorStyle awesome
:UserAvatar:
@enduml
@startuml
skinparam actorStyle Hollow
:Hollow:
@enduml
</code>
</WRAP>

<WRAP half column>
<uml>
@startuml
:Default:
@enduml
@startuml
skinparam actorStyle awesome
:UserAvatar:
@enduml
@startuml
skinparam actorStyle Hollow
:Hollow:
@enduml
</uml>
</WRAP>
</WRAP>