LaTeX宏包TikZ-UML使用备忘二

代码的文件头与备忘一中的一样，这里不再列出。
　
示例三

% 51CTO陆巍的博客
\begin{center}
    \begin{tikzpicture}
      \begin{umlpackage}[x = 0, y = 0, draw = purple, fill = umlyellow]{Policy}
        \umlsimpleclass[draw = purple]{Policy Layer}
        \umlinterface[right = 1cm of Policy Layer, draw = purple]{Policy Service Interface}{}{}
        \umluniassoc[draw = purple]{Policy Layer}{Policy Service Interface}
      \end{umlpackage}
      \begin{umlpackage}[x = 0, y = -4, draw = purple, fill = umlyellow]{Mechanism}
        \umlsimpleclass[below = 2cm of Policy Service Interface, draw = purple]{Mechanism Layer}
        \umlinterface[right = 1cm of Mechanism Layer, draw = purple]{Mechanism Service Interface}{}{}
        \umluniassoc[draw = purple]{Mechanism Layer}{Mechanism Service Interface}
      \end{umlpackage}
      \begin{umlpackage}[x = 0, y = -8, draw = purple, fill = umlyellow]{Utility}
        \umlsimpleclass[below = 2cm of Mechanism Service Interface, draw = purple]{Utility Layer}
      \end{umlpackage}
      \umlimpl[draw = purple]{Mechanism Layer}{Policy Service Interface}
      \umlimpl[draw = purple]{Utility Layer}{Mechanism Service Interface}
    \end{tikzpicture}
    \\[0.4cm]\heiti 图11.2 倒置的层次\song
  \end{center}

效果如下：

说明：
　　1)　注意控制位置的方式有两种，一种是设置坐标，一种是使用相对位置，代码中都有演示。
　　2)　这里没有过多修饰图形，所以看上去并不美观，请大家自行调整。

原文地址：http://blog.51cto.com/14013986/2331006