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对象图

Object Diagram

对象的定义

使用关键字object定义实例。

@startuml
object firstObject
object "My Second Object" as o2
@enduml

Definition of objects

You define instance of objects using the object keywords.

@startuml
object firstObject
object "My Second Object" as o2
@enduml

对象之间的关系

对象之间的关系用如下符号定义:

Type Symbol Image
Extension <|--
Composition *--
Aggregation o--

也可以用 .. 来代替 -- 以使用点线。

知道了这些规则,就可以画下面的图:

可以用冒号给关系添加标签,标签内容紧跟在冒号之后。

用双引号在关系的两边添加基数。

@startuml
object Object01
object Object02
object Object03
object Object04
object Object05
object Object06
object Object07
object Object08

Object01 <|-- Object02
Object03 *-- Object04
Object05 o-- "4" Object06
Object07 .. Object08 : some labels
@enduml

Relations between objects

Relations between objects are defined using the following symbols :

Type Symbol Image
Extension <|--
Composition *--
Aggregation o--

It is possible to replace -- by .. to have a dotted line.

Knowing those rules, it is possible to draw the following drawings.

It is possible a add a label on the relation, using : followed by the text of the label.

For cardinality, you can use double-quotes "" on each side of the relation.

@startuml
object Object01
object Object02
object Object03
object Object04
object Object05
object Object06
object Object07
object Object08

Object01 <|-- Object02
Object03 *-- Object04
Object05 o-- "4" Object06
Object07 .. Object08 : some labels
@enduml

添加属性

用冒号加属性名的形式声明属性。

@startuml

object user

user : name = "Dummy"
user : id = 123

@enduml

也可以用大括号批量声明属性。

@startuml

object user {
  name = "Dummy"
  id = 123
}

@enduml

Adding fields

To declare fields, you can use the symbol : followed by the field's name.

@startuml

object user

user : name = "Dummy"
user : id = 123

@enduml

It is also possible to group all fields between brackets {}.

@startuml

object user {
  name = "Dummy"
  id = 123
}

@enduml

类图中的通用特性

Common features with class diagrams


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