[英]Get XML child nodes when using DOM parser
我在Java
使用DOM
解析器,并试图返回子节点元素。 这是我的XML的样子:
<?xml version="1.0" encoding="UTF-8"?>
<body>
<group name="Recently Added">
<item>
<asset>138682</asset>
<date>Mar 05, 2015</date>
<artist>
<![CDATA[Marlin G. Meharry, D.D.S]]>
</artist>
<album>
<![CDATA[Career Day - Marlin G. Meharry, D.D.S]]>
</album>
<url>
<![CDATA[http://web2.puc.edu/Departments/Media_Services/file/2015/CarDayMarlinGMeharryDDS.mp3]]>
</url>
<length>
<![CDATA[36:48]]>
</length>
</item>
<item>
<asset>140705</asset>
<date>Jan 01, 2000</date>
<artist>
<![CDATA[John Nunes]]>
</artist>
<album>
<![CDATA[Educator of the Year]]>
</album>
<url>
<![CDATA[http://web2.puc.edu/Departments/Media_Services/file/2015/2015-4-2LloydBest.mp3]]>
</url>
<length>
<![CDATA[40:46]]>
</length>
</item>
</group>
<group name="Heubach Lectureship Series">
<item>
<asset>48041</asset>
<date>Mar 07, 2009</date>
<artist>
<![CDATA[Barry C. Black, United States Senate Chaplain]]>
</artist>
<album>
<![CDATA[Heubach Lecture]]>
</album>
<url>
<![CDATA[http://web2.puc.edu/Departments/Media_Services/file/2009/HeubachLecture030709.mp3]]>
</url>
<length>
<![CDATA[1:12:57]]>
</length>
</item>
</group>
</body>
因此,在我的根元素下方,我有类似于数组的组节点,因为它们包含项节点。 我需要到达项目节点以获取其数据。 到目前为止,这是我想出的,但是仍然不确定下一步该怎么做:
URLConnection urlConnection = url.openConnection();
InputStream in = new BufferedInputStream(urlConnection.getInputStream());
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(in);
NodeList categoryList = doc.getElementsByTagName("group");
for (int categoryNo=0; categoryNo<categoryList.getLength(); categoryNo++) {
//Element categoryNode = (Element)categoryList.item(categoryNo);
Node node = categoryList.item(categoryNo);
NodeList childNodes = categoryList.item(categoryNo).getChildNodes();
for (int childNo = 0; childNo < childNodes.getLength(); childNo++) {
Node childNode = childNodes.item(childNo);
if (childNode.getNodeType() == Node.ELEMENT_NODE) {
Element elem = (Element) childNode;
Log.d(elem.getNodeValue(), "Zed");
}
}
}
关于如何获得资产,艺术家,专辑等项目节点的任何提示?
由于elem
对应于XML中的item
元素,因此可以使用Element#getElementsByTagName(String elementName)
检索子元素,类似于获取group
元素的操作。 然后,您可以使用Node#getTextContent()
检索元素的内容。 例如:
Element elem = (Element) childNode;
NodeList assetNodes = elem.getElementsByTagName("asset");
if(assetNodes.getLength() > 0) {
// get the text content of the first node
String asset = assetNodes.item(0).getTextContent();
...
}
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