问题描述

像 SAX 和 StAX 这样的流式 xml 解析器比构建像 DOM 解析器这样的树结构的解析器更快，内存效率更高.SAX 是一个推送解析器，这意味着它是观察者模式(也称为侦听器模式)的一个实例.SAX 首先出现，但随后出现了 StAX - 一个拉式解析器，这意味着它基本上像迭代器一样工作.

Streaming xml-parsers like SAX and StAX are faster and more memory efficient than parsers building a tree-structure like DOM-parsers. SAX is a push parser, meaning that it's an instance of the observer pattern (also called listener pattern). SAX was there first, but then came StAX - a pull parser, meaning that it basically works like an iterator.

您可以在任何地方找到为什么更喜欢 StAX 而不是 SAX 的原因，但通常归结为:它更易于使用".

You can find reasons why to prefer StAX over SAX everywhere, but it usually boils down to: "it's easier to use".

在关于 JAXP 的 Java 教程中，StAX 被模糊地表示为 DOM 和 SAX 之间的中间:它比 SAX 更容易，比 DOM 更高效".但是，我从未发现任何迹象表明 StAX 会比 SAX 更慢或内存效率更低.

In the Java tutorial on JAXP StAX is vaguely presented as the middle between DOM and SAX: "it's easier than SAX and more efficient than DOM". However, I never found any clues that StAX would be slower or less memory efficient than SAX.

这一切让我想知道:有什么理由选择 SAX 而不是 StAX?

推荐答案

概括一下，我认为 StAX 可以和 SAX 一样高效.随着 StAX 的改进设计，我真的找不到任何首选 SAX 解析的情况，除非使用遗留代码.

To generalize a bit, I think StAX can be as efficient as SAX. With the improved design of StAX I can't really find any situation where SAX parsing would be preferred, unless working with legacy code.

编辑:根据这个博客 Java SAX 与 StAX StAX不提供模式验证.

EDIT: According to this blog Java SAX vs. StAX StAXoffer no schema validation.

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