大型XML文件和分页，可以吗? [英] Large XML Files and Pagination, is it possible?

问题描述

在计算机上本地打开非常大的XML文件时，几乎可以肯定的是，打开该文件需要一段时间-这通常意味着您的计算机由于认为没有响应而被锁定.

When opening very large XML files locally, on your machine, it's almost a certainty that it will take an age for that file to open - it can often mean your computer locks down because it thinks it's not responding.

如果您为用户提供他们使用的相当复杂的数据库或系统的XML备份，这将是一个问题-他们能够打开大型备份(更不用说使用它们)的可能性很小.

This is an issue if you serve users XML backups of rather complex databases or systems they use - the likehood of them being able to open large backups, let alone use them, is slim.

我使用XSLT向用户提供可读的备份.以这种相同的方式，有可能一次只提取一个页面，以防止一次读取整个文件，从而导致上述问题.

I use XSLT to present readable backups to users. In this same way, would it be possible to pull only a page at a time of data, to prevent the entire file from being read in one go, thus causing the issues above.

我想答案是肯定的-，但我想知道是否还有其他人也看到过同样的问题并解决了.

I imagine the answer is simply a no - but I would like to know if anyone else has seen the same issues and resolved them.

注意:这仅在本地计算机上，它不需要互联网连接.如果使事情变得简单，则可以使用JavaScript.

Note: This is on a local machine only, it must not require an internet connection. JavaScript can be used if it makes things easier.

推荐答案

使用XSLT进行分页是可能的，但可能不会导致预期的结果:为了使XSLT正常工作，必须将整个XML文档解析为DOM树.

Pagination with XSLT is possible, but will probably not lead to the desired results: For XSLT to work, the whole XML document must be parsed into a DOM tree.

您可以做的是尝试流式转换: http://stx.sourceforge.net/

What you could do, is experiment with streaming transformations: http://stx.sourceforge.net/

或者您可以在使用XSLT进行处理之前对大型XML文件进行预处理，以将其切成较小的位.为此，我将使用 XMLStarlet

Or you could preprocess the large XML file to cut it up into smaller bits before processing with XSLT. For this I'd use a command line tool like XMLStarlet

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