Java JDOM Parser – Query XML Document

Java JDOM Parser – Query XML Document

Demo Example

Here is the input xml file we need to query:

<?xml version="1.0"?>
<cars>
<supercars company="Ferrari">
<carname type="formula one">Ferarri 101</carname>
<carname type="sports car">Ferarri 201</carname>
<carname type="sports car">Ferarri 301</carname>
</supercars>
<supercars company="Lamborgini">
<carname>Lamborgini 001</carname>
<carname>Lamborgini 002</carname>
<carname>Lamborgini 003</carname>
</supercars>
<luxurycars company="Benteley">
<carname>Benteley 1</carname>
<carname>Benteley 2</carname>
<carname>Benteley 3</carname>
</luxurycars>
</cars>

Demo Example:

QueryXmlFileDemo.java

import java.io.File;
import java.io.IOException;
import java.util.List;

import org.jdom2.Attribute;
import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.JDOMException;
import org.jdom2.input.SAXBuilder;
public class QueryXmlFileDemo { public static void main(String[] args) { try { File inputFile = new File("input.txt"); SAXBuilder saxBuilder = new SAXBuilder(); Document document = saxBuilder.build(inputFile); System.out.println("Root element :" + document.getRootElement().getName()); Element classElement = document.getRootElement(); List<Element> supercarList = classElement.getChildren("supercars"); System.out.println("----------------------------"); for (int temp = 0; temp < supercarList.size(); temp++) { Element supercarElement = supercarList.get(temp); System.out.println("nCurrent Element :" + supercarElement.getName()); Attribute attribute = supercarElement.getAttribute("company"); System.out.println("company : " + attribute.getValue() ); List<Element> carNameList = supercarElement.getChildren("carname"); for (int count = 0; count < carNameList.size(); count++) { Element carElement = carNameList.get(count); System.out.print("car name : "); System.out.println(carElement.getText()); System.out.print("car type : "); Attribute typeAttribute = carElement.getAttribute("type"); if(typeAttribute !=null) System.out.println(typeAttribute.getValue()); else{ System.out.println(""); } } } }catch(JDOMException e){ e.printStackTrace(); }catch(IOException ioe){ ioe.printStackTrace(); } } }
This would produce the following result:
Root element :cars
----------------------------
Current Element :supercars
company : Ferrari
car name : Ferarri 101
car type : formula one
car name : Ferarri 201
car type : sports car
car name : Ferarri 301
car type : sports car

Current Element :supercars
company : Lamborgini
car name : Lamborgini 001
car type : 
car name : Lamborgini 002
car type : 
car name : Lamborgini 003
car type :

Was this article helpful?

Related Articles

Leave A Comment?