文档 - 如何通过名称获取标记的值？

I'm using Java's DOM parser to parse an XML file.

我正在使用Java的DOM解析器来解析XML文件。

let's say I have the following XML

假设我有以下XML

<?xml version="1.0"?>

<config>
    <dotcms>
        <endPoint>ip</endPoint>
    </dotcms>
</config>

</xml>

I like to get the value of 'endPoint'. I can do it with the following code snippet. (assuming that I already parsed it with DocumentBuilder)

我喜欢得到'endPoint'的价值。我可以使用以下代码片段来完成它。（假设我已经用DocumentBuilder解析了它）

NodeList nodeList = this.doc.getElementByTagName("dotcms");
Node nValue = (Node) nodeList.item(0);
return nValue.getNodeValue();

Is it possible to get a value of a field by a field's name? Like....

是否可以通过字段名称获取字段的值？喜欢....

Node nValue = nodeList.getByName("endPoint") something like this...?

Node nValue = nodeList.getByName（“endPoint”）这样的东西......？

2 个解决方案

#1

You should use XPath for these sorts of tasks:

您应该将XPath用于这些类型的任务：

//endPoint/text()

or:

要么：

/config/dotcms/endPoint/text()

Of course Java has a built-in support for XPath:

当然Java有对XPath的内置支持：

XPath xpath = XPathFactory.newInstance().newXPath();
XPathExpression expr = xpath.compile("//endPoint/text()");
Object value = expr.evaluate(doc, XPathConstants.STRING);

#2

You could also use jOOX, a jquery-like DOM wrapper, to write even less code:

您还可以使用jOOX（一种类似jquery的DOM包装器）来编写更少的代码：

// Using css-style selectors
String text1 = $(document).find("endPoint").text();

// Using XPath
String text2 = $(document).xpath("//endPoint").text();

#1