Read XML using Java
Hi All,
Good Morning,
I have been working as a Manual Test engineer for last 4 years. Now i started learning java for automating some of the functionaries. And here goes my requirements.
Read huge complex xml and compare values with DB2 database and generate a report.
So First of all i need to read xml using java . i did good research in google and came to know that there are many ways to read using different API like SAX, DOM , XOM Jar, XML Beans Jar and so on...
So i request you all to suggest best way to read XML ie SAX or Dom ?
if possible sample code also.
WebTester.
View Answers
April 30, 2012 at 1:57 PM
import java.io.*;
import java.util.*;
import org.w3c.dom.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
public class ParseXmlFile{
public static void main(String argv[]){
ArrayList<Student> list=new ArrayList<Student>();
try{
File file = new File("c:\\file.xml");
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document document = db.parse(file);
document.getDocumentElement().normalize();
System.out.println("Root element "+ document.getDocumentElement().getNodeName());
NodeList node = document.getElementsByTagName("student");
System.out.println("Information of the students");
for(int i = 0; i < node.getLength(); i++){
Node firstNode = node.item(i);
if(firstNode.getNodeType()== Node.ELEMENT_NODE){
Element element = (Element) firstNode;
NodeList firstNameElemntList = element.getElementsByTagName("name");
Element firstNameElement = (Element) firstNameElemntList.item(0);
NodeList firstName = firstNameElement.getChildNodes();
Node n1=firstName.item(0);
String name=n1.getNodeValue();
NodeList lastNameElementList = element.getElementsByTagName("address");
Element lastNameElement = (Element)lastNameElementList.item(0);
NodeList lastName = lastNameElement.getChildNodes();
Node n2=lastName.item(0);
String address=n2.getNodeValue();
list.add(new Student(name,address));
}
}
for(Student st:list){
System.out.println(st.getName()+"\t"+st.getAddress());
}
}
catch (Exception e) {
e.printStackTrace();
}
}
}
April 30, 2012 at 1:58 PM
Parse XML using JDOM
import java.io.*;
import org.jdom.*;
import java.util.*;
import org.jdom.input.SAXBuilder;
public class ReadXMLUsingJDOM {
public static void main(String[] args) {
SAXBuilder builder = new SAXBuilder();
File xmlFile = new File("c:\\student.xml");
try {
Document document = (Document) builder.build(xmlFile);
Element rootNode = document.getRootElement();
List list = rootNode.getChildren("class");
for (int i = 0; i < list.size(); i++) {
Element node = (Element) list.get(i);
String classid = node.getAttribute("id").getValue();
String name = node.getChildText("Name");
System.out.println("Class ID: "+classid);
System.out.println("Name: "+name);
List list1 = node.getChildren("Student");
for (int j = 0; j < list1.size(); j++) {
Element node1 = (Element) list1.get(j);
String sid = node1.getAttribute("id").getValue();
String sname = node1.getChildText("Name");
System.out.println("Student ID: "+sid);
System.out.println("Student Name: "+sname);
List list2 = node1.getChildren("Address");
for (int k = 0; k < list2.size(); k++) {
Element node2 = (Element) list2.get(k);
String saddress = node2.getChildText("id");
System.out.println("Address: "+saddress);
}
}
}
}
catch(Exception e){
System.out.println("Execption " + e.getMessage());
}
}
}
April 30, 2012 at 2:00 PM
May 1, 2012 at 11:36 AM
Thanks a lot for the quick reply.
From above two codes i think reading xml using JDOM is simple. But my XML size ranges from 30 MB to 60 MB. Will JDOM handle such huge load ?
Thanks in advance
May 1, 2012 at 8:33 PM
Finally i decided to use JDOM .
i am using following xml
<Root>
<Maste-item-detail coder="afrffica">
Name1
description
description2
<Maste-item-detail coder="afrffica">
name2
description
description2
<Maste-item-detail coder="afrffica">
name3
description
description2
And my java code is here
SAXBuilder builder = new SAXBuilder();
File xmlFile = new File("H:\sample1.xml");
try {
Document document = (Document) builder.build(xmlFile);
Element rootNode = document.getRootElement();
System.out.println ("Root element of the doc is " + rootNode.getName());
List MasterItemlist = rootNode.getChildren("Maste-item-detail");
System.out.println("Total Single Items : " + MasterItemlist.size());
for (int i = 0; i < MasterItemlist.size(); i++) {
Element node = (Element) MasterItemlist.get(i);
Element innernode = (Element) node.getChildren("content");
List name = innernode.getChildren("name");
System.out.println("First Name : " + innernode.getChildText("name"));
}
and i am getting following error
Exception in thread "main" java.lang.ClassCastException: org.jdom.ContentList$FilterList cannot be cast to org.jdom.Element
at ReadXMLFile.main(ReadXMLFile.java:28)
Root element of the doc is Root
Total Single Items : 3
please help me to get it right
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