Java Buzz Forum - Java XML parsing using DOM parser

Employees.xml:

Employee.java

package javaXMLParsing;
public class Employee {
String id;
String firstName;
String lastName;
String location;
@Override
public String toString() {
return firstName+" "+lastName+"("+id+")"+location;
}
}

Java Example program to parse XML using DOM parser:

DOMParserDemo.java

package javaXMLParsing;
import java.util.ArrayList;
import java.util.List;
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 DOMParserDemo {
public static void main(String[] args) throws Exception {
//Create object of DOM Builder Factory class By using
//DocumentBuilderFactory.newInstance() method
DocumentBuilderFactory factoryobj =
DocumentBuilderFactory.newInstance();
//Create DOM Builder Object from DocumentBuilderFactory object
DocumentBuilder builder = factoryobj.newDocumentBuilder();
//Load the XML document and parse it
Document documentobj =
builder.parse(
ClassLoader.getSystemResourceAsStream("javaXMLParsing/Employee.xml"));
List<Employee> empList = new ArrayList<>();
//Iterating through the nodes and extracting the data.
NodeList nodeList = documentobj.getDocumentElement().getChildNodes();
for (int i = 0; i < nodeList.getLength(); i++) {
//We have encountered an <employee> tag.
Node node = nodeList.item(i);
if (node instanceof Element) {
Employee emp = new Employee();
emp.id = node.getAttributes().
getNamedItem("id").getNodeValue();
NodeList childNodes = node.getChildNodes();
for (int j = 0; j < childNodes.getLength(); j++) {
Node cNode = childNodes.item(j);
//Identifying the child tag of employee every employee .
if (cNode instanceof Element) {
String content = cNode.getLastChild().
getTextContent().trim();
switch (cNode.getNodeName()) {
case "firstName":
emp.firstName = content;
break;
case "lastName":
emp.lastName = content;
break;
case "location":
emp.location = content;
break;
}
}
}
empList.add(emp);
}
}
//Printing the Employee list by using for each loop.
for (Employee emp : empList) {
System.out.println(emp);
}
}
}

Output:

saidesh kilaru(001)Bangalore
ajay chanukya(002)Chicago
Vinod Gandrakoti(003)Hyderabad


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