“使用”和“使用”有什么区别？和“取决于”？
In this beginners guide to Dependency Injection I noticed that the UML diagram distinguishes between "uses" and "depends upon".
Since both require some form of a reference in the class that "uses" or "depends upon", I wonder: What is really the difference between the two?
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查看取自 IBM Rational Software Architect 文档。
“取决于”的含义如下：
“使用”的含义如下：
正如我所读到的，“用法”是一种不太严格的“依赖关系”。
Check out the blockquotes about relationship types taken from IBM Rational Software Architect documentation.
"depends upon" means the following:
"uses" means the following:
As I read it "usage" is a less strict "dependency".
请注意，我已经说过“类”，但它同样适用于“接口”。
维基百科对此有一篇很好的文章： http://en.wikipedia.org/wiki/ Dependency_%28UML%29
因此，例如，您可以在类驱动程序和接口 IVehicle 之间建立使用关系，该关系公开一个名为 Drive() 的方法。对 Drive 实现的更改不需要对 Driver 进行任何更改，因此您说 Driver 使用 IVehicle。
然而，类驱动程序对类手有依赖关系，因为驱动程序有两个属性：手左手和手右手。如果这些的实现发生变化，则需要考虑驱动程序是否需要相应更新。
Note I've said Class, but it applies equally to Interfaces.
Wikipedia has a good article on this: http://en.wikipedia.org/wiki/Dependency_%28UML%29
So for example you could have a Uses relationship between a Class Driver and an Interface IVehicle which exposes a method called Drive(). Changes to the implementation of Drive do not require any changes to Driver, so you say Driver uses IVehicle.
However Class Driver has a Dependency on Class Hand, since Driver has two properties: Hand LeftHand and Hand RightHand. If the implementation of these changed, one would need to consider if Driver needed updating accordingly.