plantuml语法

PlantUML 是一种基于文本的图形化工具，可以通过简单易懂的语法来绘制各种类型的图形，包括时序图、用例图、类图、流程图等。下面是一些常用的 PlantUML 语法示例：

1. 时序图

@startuml
actor User
participant "First Class" as A
participant "Second Class" as B
participant "Last Class" as C
User -> A: DoWork
activate A
A -> B: Create Request
activate B
B -> C: DoWork
activate C
C --> B: WorkDone
destroy C
B --> A: Request Created
deactivate B
A --> User: Done
deactivate A
@enduml

2. 用例图

@startuml
left to right direction
actor User
User -> (Use the application) : <<Use>>
(Use the application) --> (View weather) : <<Include>>
(Use the application) --> (View map) : <<Include>>
(Use the application) --> (View news) : <<Include>>
@enduml

3. 类图

@startuml
class Car {
  -make: string
  -model: string
  -year: int
  +getMake(): string
  +getModel(): string
  +getYear(): int
}

class Driver {
  -name: string
  -age: int
  +getName(): string
  +getAge(): int
}

Driver -> Car: drives
@enduml

4. 流程图

@startuml
start
if (condition A) then (yes)
  :Action 1;
elseif (condition B) then (yes)
  :Action 2;
else (no)
  :Action 3;
endif
:Action 4;
end
@enduml

这些语法示例只是 PlantUML 的冰山一角，更多用法可以参考官方文档。