我有一个这样的 XML 文件:
<?xml version="1.0" encoding="utf-8"?>
<RootElement>
<Achild>
.....
</Achild>
</RootElement>
如何检查文件是否包含Achild
元素..?
final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
// Use the factory to create a builder
try {
final DocumentBuilder builder = factory.newDocumentBuilder();
final Document doc = builder.parse(configFile);
final Node parentNode = doc.getDocumentElement();
final Element childElement = (Element) parentNode.getFirstChild();
if(childElement.getNodeName().equalsIgnoreCase(....
但是它在 childElement 上给我的错误是 null....