对 JAXB 对象的 XPath 1.0 查询? [英] XPath 1.0 queries on JAXB objects?

问题描述

JAXB 非常棒，真正节省了时间，但遍历生成的对象树仍然非常耗时；几乎和直接使用 DOM 一样糟糕.

JAXB has been great, a real timesaver, but it's still really time consuming to traverse the resulting object trees; almost as bad as working directly with the DOM.

有没有一种方法可以在 JAXBElement 上执行 XPath 1.0 查询，而不必每次都费力地将文档编组到 DOM 模型中?

Is there a way that I can do XPath 1.0 queries on a JAXBElement, without having to painstakingly marshal the document to and from a DOM model each time?

推荐答案

不是直接的，不是.但是，您可以使用 Apache Commons Jxpath，它允许您跨任意对象图运行 XPath 查询，而不是只是 JAXB 绑定的.它可以在容忍空值的宽松"模式下运行.

Not directly, no. However, you can use Apache Commons Jxpath, which allows you to run XPath queries across arbitrary object graphs, not just JAXB-bound ones. It can be run in "lenient" mode, which is tolerant of nulls.

非常方便替换那些容易出现 NPE 的图形导航.

Extremely handy for replacing those NPE-prone graph navigations.

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