UML中关联和依赖的区别
发布时间：2020-12-13 20:04:55 所属栏目：百科 来源：网络整理
导读：1，Dependency Relationship Draw a dependency relationship between two classes,or between a class and an interface,to show that the client class depends on the supplier class/interface to provide certain services,such as: The client class a
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1，Dependency Relationship Draw a dependency relationship between two classes,or between a class and an interface,to show that the client class depends on the supplier class/interface to provide certain services,such as: The client class accesses a value (constant or variable) defined in the supplier class/interface.（访问一个属性值） Operations of the client class invoke operations of the supplier class/interface.（访问一个方法） Operations of the client class have signatures whose return class or arguments are instances of the supplier class/interface.（返回值或者参数是一个被依赖者实例） A dependency relationship is a dotted line with an arrowhead at one end:The arrowhead points to the supplier class.（是一条带箭头的虚线） 2，Association Relationship An association provides a pathway for communication. The communication can be between use cases and actors,between two classes or between a class and an interface. Associations are the most general of all relationships and consequentially the most semantically weak. If two objects are usually considered independently,the relationship is an association （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |