XPath-如何获取具有相同名称的多个标签的列表
<?xml version="1.0"?><shop>
<shoes>
<brand>Nike</brand>
<size>13</size>
<colour>White</colour>
<price>34.99</price>
<additional name="abc">123</additional>
<additional name="def">456</additional>
<additional name="ghi">789</additional>
<additional name="jkl">101</additional>
</shoes>
<trousers>
<brand>Levi</brand>
<size>36</size>
<legSize>33</legSize>
<colour>Stonewash</colour>
<price>69.99</price>
<additional name="mno">112</additional>
<additional name="pqr">131</additional>
<additional name="stu">415</additional>
<additional name="vwx">161</additional>
</trousers>
</shop>
给定上面的xml文件,我将如何检索<additional>
标签内所有标签的列表<shoes>
?我想获取“名称”的所有值以及标签之间的数字值。像这样:
abc, 123def, 456
ghi, 789
jkl, 101
问题是我不知道会有多少个附加标签。可能没有,也可能有20。我需要某种方法来对它们全部进行计数,然后删除信息。
回答:
这是一个使用XPath
JDK执行查询的示例。它假定变量xml
包含您的XML文档。
XPathFactory factory = XPathFactory.newInstance();XPath xPath = factory.newXPath();
NodeList nodeList = (NodeList) xPath.evaluate("//shoes/additional", new InputSource(new StringReader(xml)), XPathConstants.NODESET);
for (int i = 0; i < nodeList.getLength(); ++i) {
String name = nodeList.item(i).getAttributes().getNamedItem("name").getNodeValue();
String text = nodeList.item(i).getTextContent();
System.out.println(name + ", " + text);
}
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