什么是类工厂？ [英] What exactly is a Class Factory?

问题描述

我经常看到这个词，我可能已经使用它自己在代码和库中的时间，但我从来没有真正得到它。在大多数写作中，我遇到了，他们只是希望你能想出来。

I see the word thrown around often, and I may have used it myself in code and libraries over time, but I never really got it. In most write-ups I came across, they just went on expecting you to figure it out.

什么是类工厂？有人可以解释这个概念吗？

What is a Class Factory? Can someone explain the concept?

推荐答案

类工厂构造其他类的实例。通常，它们创建的类共享一个公共的基类或接口，但返回派生类。

A class factory constructs instances of other classes. Typically, the classes they create share a common base class or interface, but derived classes are returned.

例如，你可以有一个类工厂，并返回一个实现 IDbConnection 的类，例如 SqlConnection （类和接口.Net）

For example, you could have a class factory that took a database connection string and returned a class implementing IDbConnection such as SqlConnection (class and interface from .Net)

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