问题描述
使用Builder Pattern的一些常用，真实世界示例是什么？它买什么？为什么不使用工厂模式？
What are some common, real world examples of using the Builder Pattern? What does it buy you? Why not just use a Factory Pattern?
推荐答案
构建器和工厂IMHO之间的关键区别是，构建器对于你需要做许多事情才能建立一个对象。例如，想像一个DOM。您必须创建大量的节点和属性来获取最终对象。工厂可以在一个方法调用中轻松创建整个对象。
The key difference between a builder and factory IMHO, is that a builder is useful when you need to do lots of things to build an object. For example imagine a DOM. You have to create plenty of nodes and attributes to get your final object. A factory is used when the factory can easily create the entire object within one method call.
使用构建器的一个例子是构建一个XML文档，我已经使用这个模型在构建HTML片段时，例如我可能有一个Builder用于构建一个特定类型的表，它可能有以下方法（参数未显示）：
One example of using a builder is a building an XML document, I've used this model when building HTML fragments for example I might have a Builder for building a specific type of table and it might have the following methods (parameters are not shown):
BuildOrderHeaderRow()
BuildLineItemSubHeaderRow()
BuildOrderRow()
BuildLineItemSubRow()
然后，这个构建器会为我吐出HTML。这很容易阅读，然后走大程序方法。
This builder would then spit out the HTML for me. This is much easier to read then walking through a large procedural method.
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