[英]Can't get NodeList from current node in java xml parser
So, I have this xml file: 所以,我有这个xml文件:
<Network id="TestSet01" description="Simple test set to begin development">
<node_list>
<node id="n0"/>
<node id="n1"/>
<node id="n2"/>
</node_list>
</Network>
And i have this code: 我有这段代码:
try {
File inputFile = new File("TestSet01_Network.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(inputFile);
doc.getDocumentElement().normalize();
NodeList rList = doc.getElementsByTagName("Network");
for (int h = 0; h < rList.getLength(); h++) {
Node rNode = rList.item(h);
String name = ((Element) rNode).getAttribute("id");
String description = ((Element) rNode).getAttribute("description");
NodeList nList = ((Element) rNode).getElementsByTagName("node_list"); //Doesn't work properly here
for (int i = 0; i < nList.getLength(); i++) {
//code
}
} catch (ParserConfigurationException | SAXException | IOException e) {
}
The problem I'm having is that I can't seem to get the NodeList containing the child nodes of the "node_list" node so I can iterate them individually in the "for" loop after. 我遇到的问题是,我似乎无法获得包含“ node_list”节点的子节点的NodeList,因此之后可以在“ for”循环中分别对其进行迭代。 The code seems to be correct but the list isn't right.
该代码似乎是正确的,但列表不正确。 I marked the line where I'm having this problem.
我在出现此问题的地方标记了一行。
NodeList rList = doc.getElementsByTagName("Network");
will return you the List containing 1 child : ... 将返回包含1个孩子的列表:...
and nodes are actually it's children So you just need to go 1 level deeper before starting a loop 和节点实际上是孩子,所以您只需要在开始循环之前再深入1级
Element root = doc.getDocumentElement(); //Network
for (int i = 0; i < root.getChildNodes().getLength(); i++) {
Node n = root.getChildNodes().item(i);
if (n instanceof Element) {
NodeList nodes = n.getChildNodes();
for (int j = 0; j < nodes.getLength(); j++) {
Node theNode = nodes.item(j);
if (theNode instanceof Element) {
System.out.println(((Element) theNode).getAttribute("id"));
}
}
}
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.