简单来说，策略模式更多的是运行时行为的创建，您不关心实现类。另一方面，工厂是运行时创建的具体类实例，它是由你使用任何行为(方法)公开的实现接口。

工厂模式是一种创建模式。战略模式是一种操作模式。换句话说，工厂模式用于创建特定类型的对象。策略模式用于以特定方式执行一个操作(或一组操作)。在经典的例子中，工厂可能会创建不同类型的动物:狗、猫、虎，而策略模式将执行特定的动作，例如，移动;使用跑，走或Lope策略。

事实上，这两者可以一起使用。例如，您可能有一个创建业务对象的工厂。它可以根据持久性介质使用不同的策略。如果数据以XML形式存储在本地，则使用一种策略。如果数据位于不同的远程数据库中，则它将使用另一个数据库。

战略和工厂是不同的目的。在策略中，您已经定义了方法，使用此模式可以交换行为(算法)。来到工厂有很多变化。但是GO4状态工厂的原始模式将对象的创建留给了子类。这里用工厂替换的是完整的实例，而不是你感兴趣的行为。这样你将取代整个系统，而不是算法。

工厂模式是关于决定创建哪个对象，而策略模式是关于使用创建的对象。例如，使用哪种策略可以由工厂模式决定

策略模式允许您多态地更改类的行为。

工厂模式允许封装对象创建。

加里说得很好。如果您使用的编码原则是抽象的，而不是“具体化”的，那么很多模式看起来就像是主题的变体。

First of all a difference between simple factory and abstract factory must be made. The first one is a simple factory where you only have one class which acts as a factory for object creation, while in the latter you connect to an factory interface (which defines the method names) and then call the different factories that implement this interface which are supposed to have different implementations of the same method based on some criteria. For example, we have a ButtonCreationFactory interface, which is implemented by two factories, the first WindowsButtonCreationFactory (creates buttons with Windows look and feel) and the second LinuxButtonCreationFactory (creates buttons with Linux look and feel). So both these factories do have the same creation method with different implementations (algorithms). You can reference this in runtime based on the method that you type of button that you want.

例如，如果你想要带有Linux外观和感觉的按钮:

ButtonCreationFactory myFactory = new LinuxButtonCreationFactory();
Button button1 = myFactory.createButton(...);

或者你想要Windows按钮

ButtonCreationFactory myFactory = new WindowsButtonCreationFactory();
Button button1 = myFactory.createButton(...);

Exactly in this case, it results in a kind of strategy pattern, since it differentiates algorithms for doing some creation. However, it differs from it semantically because it is used for OBJECT CREATION rather than operational algorithms. So, basically with abstract factory you have object creation using different strategies, which makes it very similar to the strategy pattern. However the AbstractFactory is creational, while the Strategy pattern is operational. Implementation wise, they result to be the same.