UML 组合与聚合

每次写一次这个就要翻一次 PPT,这次干脆记录下来,便于以后查看。 聚合(aggregation) 聚合 是一种特殊的 联系 An Aggregation can be defined as: A special form of association that models a whole-part relationship between an aggregate (the whole) an
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