UML作业第一次：UML用例图绘制

什么是PlantUML？

PlantUML是一个快速创建UML图形的组件。

PlantUML支持的图形有：

（1）sequence diagram,

（2）use case diagram,

（3）class diagram,

（4）activity diagram (here is the new syntax),

（5）component diagram,

（6）state diagram,

（7）object diagram,

（8）wireframe graphical interface。

 图书管理系统的UML用例图：

（1）脚本：

@startuml
left to right direction

skinparam packageStyle rectangle

actor AdministratorXht

actor ReaderXht

rectangle LibrarySystem{

:AdministratorXht:-->(Borrowing Card Processing):Public procedure

:AdministratorXht:-->(Borrowing books):Public procedure

:AdministratorXht:-->(Books Collation)

:ReaderXht:->(Borrowing Card Processing):Public procedure

:ReaderXht:-->(Borrowing books):Public procedure

:ReaderXht:-->(Overdue treatment)

:ReaderXht:-->(Compensation for damage)

}

:ReaderXht:-->(Return books)
@enduml

（2）用例图：