如何更新大型XML文件 [英] How to update large XML file

问题描述

在更新单个元素时，是否有更好的替代方法来更新文件，而不是重写xml文件的全部内容？

Rather than rewriting the entire contents of an xml file when a single element is updated, is there a better alternative to updating the file?

推荐答案

我建议使用VTD-XML http://vtd-xml.sourceforge.net/

I would recommend using VTD-XML http://vtd-xml.sourceforge.net/

来自他们的常见问题解答（ http： //vtd-xml.sourceforge.net/faq.html ）：

From their FAQ ( http://vtd-xml.sourceforge.net/faq.html ):

为什么我要将VTD-XML用于大型XML文件？

Why should I use VTD-XML for large XML files?

由于以下概述的众多原因：

For numerous reasons summarized below:

• 性能：性能VTD-XML比SAX好得多


• 易于使用：随机访问与XPath结合使应用程序易于编写


• 更好的可维护性：应用程序代码更短更容易理解。


• 增量更新：偶尔，小的变化变得非常有效。


• 索引：预解析的XML形式将进一步提高处理性能。


• 其他功能：只能使用VTD-XML剪切，粘贴，拆分和汇编XML文档。

• Performance: The performance of VTD-XML is far better than SAX
• Ease to use: Random access combined with XPath makes application easy to write
• Better maintainability: App code is shorter and simpler to understand.
• Incremental update: Occasional, small changes become very efficient.
• Indexing: Pre-parsed form of XML will further boost processing performance.
• Other features: Cut, paste, split and assemble XML documents is only possible with VTD-XML.

为了利用VTD-XML，我们建议开发人员将超大型XML文档拆分为更小，更易管理的卡盘（<2GB）。

In order to take advantage of VTD-XML, we recommended that developers split their ultra large XML documents into smaller, more manageable chucks (<2GB).

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