在Java中查找没有适当名称空间的Node中的元素 [英] Find elements in a Node without the proper namespace, in Java

问题描述

所以我有一个在这里声明的xml文档:

So I have a xml doc that I've declared here:

DocumentBuilder dBuilder = dbFactory_.newDocumentBuilder();
StringReader reader = new StringReader(s);
InputSource inputSource = new InputSource(reader);
doc_ = dBuilder.parse(inputSource);

然后我有一个函数，我在其中传递一个字符串，我想将该字符串与xml中的元素进行匹配:

Then I have a function where I pass in a string and I want to match that to an element in my xml:

void foo(String str)
{
  NodeList nodelist = doc_.getDocumentElement().getElementsByTagName(str);
}

问题是当 str 进入时，其中没有任何名称空间，因此我要测试的xml是:

The problem is when the str comes in it doesn't have any sort of namespace in it so the xml that I would be testing would be:

<Random>
  <tns:node />
</Random>

和 str 将成为节点.所以nodelist现在为null，因为它期望tns:node但我传入了node.而且我知道忽略名称空间不是很好，但在这种情况下很好.我的问题是我不知道如何在忽略命名空间的同时在Node上搜索元素.我还考虑过将名称空间添加到出现的str中，但是我也不知道该怎么做.

and the str will be node. So nodelist is now null because its expecting tns:node but I passed in node. And I know its not good to ignore the namespace but in this instance its fine. My problem is that I don't know how to search the Node for an element while ignoring the namespace. I also thought about adding the namespace to the str that comes in but I have no idea how to do that either.

任何帮助将不胜感激，

谢谢-乔什

推荐答案

为匹配名称为'str'的所有节点，而与命名空间无关，请使用以下命令:

In order to match all nodes whose name is 'str' regardless of namespace use the following:

NodeList nodes = doc.getDocumentElement().getElementsByTagNameNS("*", str);

通配符"*"将匹配任何名称空间.请参阅

The wildcard "*" will match any namespace. See Element.getElementsByTagNameNS(...).

编辑:此外，@ Wheezil如何在注释中正确说明，您必须调用 DocumentBuilderFactory.setNamespaceAware(true)才能正常工作，否则命名空间将无法正常工作被发现.

Edit: in addition, how @Wheezil correctly stated in a comment, you have to call DocumentBuilderFactory.setNamespaceAware(true) for this to work, otherwise namespaces will not be detected.

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