hello can anybody help me with this issue i have java code to print information that exists in XML file i will paste it here, so i want to print the information based on user input , as example the user enter the Id number then the program should print all information relative to that Id
so my java code is :
package parse;
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 Parse {
public static void main(String[] args) {
try{
File inputFile = new File("C:\\Users\\Abdal\\Documents\\NetBeansProjects\\Creation\\user_info.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
// this class is to initialize the usage and dealing of the XML file.
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(inputFile);
// parse method actually parses (understands) the XML file, the whole sturucture
// of the XML file is copied inside a Document object, inour case doc.
// doc becomes a tree (to be traversed)
doc.getDocumentElement().normalize();
// normalization for tags, the same tags are (grouped) in one group.
System.out.println("Root element :" + doc.getDocumentElement().getNodeName());
System.out.println(doc.getDocumentElement().hasAttribute("id"));
NodeList nList = doc.getElementsByTagName("user");
//NodeList is data structure that used to create a list nList
//nList will contain a list of student tags.
//nList is a list of nodes, each node has its own elements and data
System.out.println(nList.getLength());
System.out.println("----------------------------");
for (int temp = 0; temp < nList.getLength(); temp++) {
Node nNode = nList.item(temp);
// load the node with number temp
System.out.println("\nCurrent Element :" + nNode.getNodeName());
System.out.println("Parent Node is:"+ nNode.getParentNode().getNodeName());
System.out.println("Element type=" + nNode.getNodeType());
if (nNode.getNodeType() == Node.ELEMENT_NODE) {
//getNodeType() returns the type of the node.
// Node is a class, and ELEMENT_NODE is is a constant memebr variable, its value is 1
Element eElement = (Element) nNode;
// casting from nNode to Element object
// Element class has extra methods related to XML functions
System.out.println("Id : " + eElement.getAttribute("id"));
System.out.println("Username : " + eElement.getElementsByTagName("username").item(0).getTextContent());
System.out.println("Password : " + eElement.getElementsByTagName("password").item(0).getTextContent());
System.out.println("Address : " + eElement.getElementsByTagName("address").item(0).getTextContent());
//System.out.println("Marks : " + eElement.getElementsByTagName("marks").item(0).getTextContent());
//System.out.println("Address : " + eElement.getElementsByTagName("address").item(0).getTextContent());
}
}
}catch(Exception e){
System.out.println(e.toString());
}
}
}the XML file structure is :
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<users>
<user id="1">
<username>ahmad</username>
<password>1234</password>
<address>nablus</address>
</user>
</users>also i will paste here my XML file creation code :
package creation;
import java.io.File;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
public class Creation {
public static void main(String[] args) throws SAXException, IOException, TransformerConfigurationException, TransformerException {
try {
String xmlFilePath = "user_info.xml";
DocumentBuilderFactory documentFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder documentBuilder = documentFactory.newDocumentBuilder();
Document document = documentBuilder.newDocument();
Element root = document.createElement("users");
document.appendChild(root);
// user element
Element user = document.createElement("user");
Attr attr = document.createAttribute("id");
attr.setValue("1");
user.setAttributeNode(attr);
root.appendChild(user);
Element username = document.createElement("username");
username.appendChild(document.createTextNode("ahmad"));
user.appendChild(username);
Element password = document.createElement("password");
password.appendChild(document.createTextNode("1234"));
user.appendChild(password);
Element address = document.createElement("address");
address.appendChild(document.createTextNode("nablus"));
user.appendChild(address);
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
DOMSource domSource = new DOMSource(document);
StreamResult streamResult = new StreamResult(new File(xmlFilePath));
// If you use
// StreamResult result = new StreamResult(System.out);
// the output will be pushed to the standard output ...
// You can use that for debugging
transformer.transform(domSource, streamResult);
System.out.println("Done creating XML File");
}
catch (ParserConfigurationException pce) {
pce.printStackTrace();
}
}
}