Plantuml 两个类之间的几个箭头

Question

我正在尝试绘制一个类图，其中两个类之间的多个关系是用重数定义的。

默认情况下，结果很糟糕:

@startuml

class Movie {
    genres: String[]
    minutes: Integer
    movie_id: String
    rating: Float
    title: String
    type: String
    votes: Integer
    year: Integer
}

class Person {
    birthYear: Integer
    deathYear: Integer
    name: String
    person_id: String
}

Person "0..*" -> "1..*" Movie : acted_in
Person "0..*" -> "1..*" Movie : directed
Person "0..*" -> "1..*" Movie : produced
Person "0..*" -> "1..*" Movie : wrote

@enduml

使用 skinparam nodesep 200 会好一点，但多重性仍然关闭:

我还尝试了 skinparam linetype ortho，它看起来很有前途，但是一旦我还添加了 hide circle 和 hide methods 就搞砸了>…

更何况最终我还想添加一个关联类，这真的毁了它:

这是最终代码:

skinparam nodesep 200
skinparam linetype ortho
hide circle
hide methods

class Movie {
    genres: String[]
    minutes: Integer
    movie_id: String
    rating: Float
    title: String
    type: String
    votes: Integer
    year: Integer
}

class Person {
    birthYear: Integer
    deathYear: Integer
    name: String
    person_id: String
}

Person "0..*" -> "1..*" Movie : acted_in
Person "0..*" -> "1..*" Movie : directed
Person "0..*" -> "1..*" Movie : produced
Person "0..*" -> "1..*" Movie : wrote
(Person,Movie) .. Role

class Role {
    name: String
}

@enduml

我的问题是:有没有办法用 PlantUML 正确地绘制它？

Answer 1

我不知道如何直接实现更清晰的箭头布局的目标，但您可以通过使用 Person 作为四个子类(例如 Actor、Director、Producer 和 ScreenplayWriter)的泛化来避免这个问题。这些中的每一个都有单独的箭头，它可能会使您的图表通常也更清晰(当然，后者取决于您的品味和图表的目的)