本文介绍了在java中获取具有命名空间的XML节点的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有下一个 XML:
<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
<Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2"
xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"
xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2"
xmlns:ccts="urn:un:unece:uncefact:documentation:2"
xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
xmlns:ext="urn:oasis:names:specification:ubl:schema:xsd:CommonExtensionComponents-2"
xmlns:qdt="urn:oasis:names:specification:ubl:schema:xsd:QualifiedDatatypes-2"
xmlns:sac="urn:sunat:names:specification:ubl:peru:schema:xsd:SunatAggregateComponents-1"
xmlns:udt="urn:un:unece:uncefact:data:specification:UnqualifiedDataTypesSchemaModule:2"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<ext:UBLExtensions>
<ext:UBLExtension>
<ext:ExtensionContent>
<!-- SOME CODE HERE -->
</ext:ExtensionContent>
</ext:UBLExtension>
<ext:UBLExtension>
<ext:ExtensionContent>
<!-- I WANT TO GET THIS NODE -->
</ext:ExtensionContent>
</ext:UBLExtension>
</ext:UBLExtensions>
我怎样才能得到这个节点?我试过了
How can I get this node? I've tried
Document doc = dbf.newDocumentBuilder().parse(new FileInputStream(PATH_TO_MY_XML));
NodeList nodes = doc.getDocumentElement().getElementsByTagNameNS("*", "UBLExtension");
但它返回一个空数组.我该怎么做?
but it returns an empty array. How can I do it?
推荐答案
A - Demo Code
import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class GetXMLNodeInJavaDemo {
public static void main(String[] args) {
try {
File fXmlFile = new File("sampleFile.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
dbFactory.setNamespaceAware(true);
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(fXmlFile);
doc.getDocumentElement().normalize();
printByElementTagname(doc);
} catch (Exception e) {
e.printStackTrace();
}
}
private static void printByElementTagname(Document doc) {
NodeList nodes = doc.getDocumentElement().getElementsByTagNameNS("*", "UBLExtension");
Node node;
for(int i = 0; i < nodes.getLength(); i++) {
node = nodes.item(i);
System.out.println(node.getNodeName() + " : " + node.getTextContent().trim());
}
}
}
B - 示例文件:sampleFile.xml
<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
<Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2"
xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"
xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2"
xmlns:ccts="urn:un:unece:uncefact:documentation:2"
xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
xmlns:ext="urn:oasis:names:specification:ubl:schema:xsd:CommonExtensionComponents-2"
xmlns:qdt="urn:oasis:names:specification:ubl:schema:xsd:QualifiedDatatypes-2"
xmlns:sac="urn:sunat:names:specification:ubl:peru:schema:xsd:SunatAggregateComponents-1"
xmlns:udt="urn:un:unece:uncefact:data:specification:UnqualifiedDataTypesSchemaModule:2"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<ext:UBLExtensions>
<ext:UBLExtension>
<ext:ExtensionContent>
Some Code
</ext:ExtensionContent>
</ext:UBLExtension>
<ext:UBLExtension>
<ext:ExtensionContent>
What you want
</ext:ExtensionContent>
</ext:UBLExtension>
</ext:UBLExtensions>
</Invoice>
C - 示例输出
ext:UBLExtension : Some Code
ext:UBLExtension : What you want
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