dot 语言画类图和 UML 关系环境变量与命令行VSCode （实时预览编辑器）类图一对多多对多UML(统一建模语言)关系其他学习链接

digraph G {
  a->b
}

digraph Class{
    rankdir=BT; // 箭头从下到上
    // 默认方形
    node [shape = "record", fontname = "Consolas"]
    // 默认空箭头
    edge [arrowhead = "empty", fontname = "Consolas"]

    // + 公有 - 私有 # 保护 ~ 包级(默认) \l左对齐换行
    people [label = "{people
    | +name: String\l
    -age: int\l
    | +getAge(): int\l}"]
    // o- 表示接口
    study [label = "{o- study}"]

    // 继承 extends
    student -> people
    // 实现 implements
    student -> study [style="dashed"]
}

digraph {
    1 -> n [
        arrowhead = "crow"
        taillabel="1  "
        headlabel="n  "
    ]
}

digraph {
    1 -> n [
        dir = "both"
        arrowtail = "crow"
        arrowhead = "crow"
        taillabel="n  "
        headlabel="n  "
    ]
}

digraph UML{
    rankdir=LR
    // 设置字体防止乱码
    fontname = "Microsoft YaHei"
    node [fontname = "Microsoft YaHei"]
    edge [fontname = "Microsoft YaHei"]
    
    子类 -> 父类
    [label = "1继承泛化
    Generalization
    extends"
    arrowhead = "empty"]

    接口[label = "接口
    interface"]

    实现 -> 接口
    [label = "2实现
    Realization
    implements "
    arrowhead = "empty"
    style="dashed"]

    主体 -> 工具
    [label = "3依赖
    Dependency"
    arrowhead = "vee"
    style="dashed"]


    主人 -> 被拥有
    [label = "4.1关联
    Association"
    arrowhead = "vee"]

    A -> B
    [label = "4.2双向关联"
    arrowhead = "none"]

    C -> C
    [label = "4.3自身关联"
    arrowhead = "vee"]


    成员 -> 整体
    [label = "5聚合
    Aggregation"
    dir = "both"
    arrowtail = "vee"
    arrowhead = "odiamond"]

    部分 -> 总体
    [label = "6.组合
    Composition"
    dir = "both"
    arrowhead = "diamond"
    arrowtail = "vee"]
}