I have an XML like the following,
<?xml version="1.0" encoding="utf-8"?>
<PaymentElement>
<Payment seqID="3">
<TPayment>
<Status>status</Status>
</TPayment>
</Payment>
</PaymentElement>
The question is how do I retrieve/extract seqID value which is 3 out of this via java.
I have tried the following way, but it doesn't work.
InputStream xml = conn.getInputStream();
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(xml);
NodeList list = doc.getElementsByTagName("PaymentElement");
for(int i=0; i<=list.getLength();i++){
NodeList paySeq=doc.getElementsByTagName("Payment seqID");
System.out.println("Payment seqID"+paySeq);
}
XPath xpath = XPathFactory.newInstance().newXPath();
XPathExpression expr = xpath.compile("/PaymentElement/Payment/@seqID");
Object result = expr.evaluate(doc, XPathConstants.STRING);
result
should be having 3
now.
Full Example
import java.io.*;
import javax.xml.xpath.*;
import org.xml.sax.InputSource;
public class Demo {
public static void main(String[] args) throws Exception {
InputStream inputStream = new FileInputStream("sample.xml");
InputSource inputSource = new InputSource(inputStream);
XPath xpath = XPathFactory.newInstance().newXPath();
XPathExpression expr = xpath.compile("/PaymentElement/Payment/@seqID");
Object result = expr.evaluate(inputSource, XPathConstants.STRING);
System.out.println(result);
}
}
try
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new File("1.xml"));
Element e = (Element)doc.getDocumentElement().getElementsByTagName("Payment").item(0);
String id = e.getAttribute("seqID");
System.out.println("Payment seqID = " + id);
output
Payment seqID = 3
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