Changing an existing XML-File

Hello everybody,
is there any way to change an existing xml file (adding an xml element, for example), without copy the hole file?
I've found kxml2 which can parse the xml files or build new xml files, but it doesn't support changing...
Thank you
Micha

Pradeep thank you for your response. it was helpful. However, I also found the responses to both my questions.
i. The null pointer exception was due to using a complex query I was using in the LOV query. I tried a simple query and that worked fine.
ii. For modifying the user defined attributes one can consult the following forum post:
OIM 11g - Change UDF Field Type form String to LOV
Thanks

Similar Messages

How do i update an existing XML File?

Hello, I have the following xml file gps.xml:<?xml version="1.0"?>
<!DOCTYPE gps SYSTEM "gps.dtd">
<gps>
   <latitude>43.00000</latitude>
   <longitude>-83.00000</longitude>
</gps> I already have methods written to get the values. But how can I change these values and update the file to reflect these changes?
thanks for your help!

Hi, I already have this following code. I would just like to add a method to it to update the existing XML file with different lat/lon coordinates. Could you please help me out with it? thanks
import java.io.*;
import java.io.PrintWriter;
import java.net.MalformedURLException;
import java.net.URL;
import javax.xml.parsers.*;
import org.w3c.dom.*;
import org.xml.sax.*;
public class Gps implements java.io.Serializable {
    private double latitude_;
    private double longitude_;
    public Gps(Document doc) {
        setup(doc.getDocumentElement());
    public Gps(String uri) throws IOException, SAXException, ParserConfigurationException {
        setup(uri);
    public void setup(Document doc) {
        setup(doc.getDocumentElement());
    public void makeElement(Node parent) {
        Document doc;
        if (parent instanceof Document) {
            doc = (Document)parent;
        } else {
            doc = parent.getOwnerDocument();
        Element element = doc.createElement("gps");
        int size;
        URelaxer.setElementPropertyByDouble(element, "latitude", this.latitude_);
        URelaxer.setElementPropertyByDouble(element, "longitude", this.longitude_);
        parent.appendChild(element);
     public Document makeDocument() throws ParserConfigurationException {
        Document doc = UJAXP.makeDocument();
        makeElement(doc);
        return (doc);
    public final double getLatitude() {
        return (latitude_);
    public final void setLatitude(double latitude) {
        this.latitude_ = latitude;
    public final double getLongitude() {
        return (longitude_);
    public final void setLongitude(double longitude) {
        this.longitude_ = longitude;
   public final void updateXmlFile(double latitude, double longitude) {
     // something???
    public final void updateXmlFile(double latitude, double longitude) {
        this.latitude_ = latitude;
        this.longitude_ = longitude;
    public String makeTextDocument() {
        StringBuffer buffer = new StringBuffer();
        makeTextElement(buffer);
        return (new String(buffer));
    public void makeTextElement(StringBuffer buffer) {
        int size;
        buffer.append("<gps");
        buffer.append(">");
        buffer.append("<latitude>");
        buffer.append(Double.toString(getLatitude()));
        buffer.append("</latitude>");
        buffer.append("<longitude>");
        buffer.append(Double.toString(getLongitude()));
        buffer.append("</longitude>");
        buffer.append("</gps>");
    public String toString() {
        try {
            return (makeTextDocument());
        } catch (Exception e) {
            return (super.toString());
}

How to update Elements value inside existing xml file

Hi Gurus,
Am somehow new to java and working on xml with java, i have a scenario where i want to update the elements of my existing xml file, i know its possible as i have posted one code on this forum which updates the values of the arrtibutes of existing xml file. Ref :
http://forum.java.sun.com/thread.jsp?forum=34&thread=186091&start=15&range=15&hilite=false&q=
But am not able to use the same code to update the vlaues of the attribute.
if i have this xml file :
<?xml version="1.0"?>
<RootElement>
<Transaction>
<Task9>
<TaskID>Task9</TaskID>
<Description>My Test Case</Description>
<Time>12/12/2004</Time>
</Task9>
</Transaction>
<Transaction>
<Task2>
<TaskID>Task2</TaskID>
<Description>Testing my xml</Description>
<Time>12/12/2004</Time>
</Task2>
</Transaction>
</RootElemen>
Now i want to update teh </Description> and </Time> field using the code that i have given above in the link.
If any one can help me ill really appreciate.

The value of an element is stored in a child node of that element. For example, let's say that "e" references the node <Description> then:
e.getFirstChild().getNodeValue() => "My Test Case"

Updating an existing xml file using java code

hi friends,
I have simple problem, I have an existing xml file and I want to update some of the values in the file.
can any one send me the java code for that.
bye.
-harish

org.w3c.dom.Document d = parseXmlFile("D:/www/Detailcache/detail.xml", false);
public static Document parseXmlFile(String filename, boolean validating) {
try {
// Create a builder factory
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setValidating(validating);
// Create the builder and parse the file
Document doc = factory.newDocumentBuilder().parse(new File(filename));
return doc;
} catch (Exception e) {
System.out.println("ERROR-->");e.printStackTrace();
return null;
look at .. for more related examples
http://javaalmanac.com/egs/javax.xml.parsers/BasicDom.html?l=rel

Changes in the xml file AFTER submitting to store

hi,
I recently added a Podcast for BMWGroup.com to the iTunes store, which hasn't been released yet.
What I want to know is, whether changes in the xml file, that i made AFTER submitting it will be taken over when the feeds are going to be released.
For example a different categorie or image..
and if not? how can i change categorie or image later? does it update from the xml?
does anyone know?
thx,
best regards,
oliver
thx,

Oliver:
The simple answer is yes. Any changes you make to your RSS feed file (xml file) will eventually be updated by ITMS. Usually ITMS updates feed changes within 24 hours. However, the most recent changes I made in my feed files took almost 8 days before ITMS refreshed my listing.
One issue is clear. If you make changes to your image file, there is a high probability that when ITMS updates your database record, your listing in ITMS will show the broken link image for awhile. I've changed my image file twice, and each time, my ITMS listing showed the broken link image. Eventually the new image shows up, but it does take a long time for this day and age.
Good luck!

I am unabele to create nodes to existing xml file

I want to append and update the nodes and attributes to existing xml file.
presently am using dom api, am i do that with dom or sax,if so how can i plz ...

http://java.sun.com/xml/tutorial_intro.html

How I can append new node in existing XML file

I've just begun learning DOM XML , so I'm currently at a very beginner level.
I have an existing XML file that I would like to add an additional node to before saving it to another variable.
how I can append new node in this file.
now this code is overwrite new data over old data
The code looks like this:
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerFactoryConfigurationError;
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;
public class VerbXMLWriter
    static String EVerb3;
    static String englishTranslate3;
    public void VerbXMLWriter(String EVerb, String englishTranslate )
         EVerb3 = EVerb;
         englishTranslate3=englishTranslate;
    File xmlFile = new File("VerbDB.xml");
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    try
     DocumentBuilder builder = factory.newDocumentBuilder();
     Document document = builder.newDocument();
    Element root = document.createElement("Verb");
     document.appendChild(root);
     Element verb = document.createElement(EVerb3);
     verb.setAttribute("EnglishTranslate",englishTranslate3);
     root.appendChild(verb);
     Source xmlSource = new DOMSource( document );
     Result result = new StreamResult( new FileOutputStream(xmlFile) );
    TransformerFactory transformerFactory = TransformerFactory.newInstance();
    Transformer transformer =
    transformerFactory.newTransformer();
    transformer.setOutputProperty( "indent", "yes" );
     transformer.transform( xmlSource, result );
catch(TransformerFactoryConfigurationError factoryError )
    factoryError.printStackTrace();
   catch (ParserConfigurationException pc)
       pc.printStackTrace();
   catch (IOException io)
      io.printStackTrace();
   catch(Exception excep )
       excep.printStackTrace();
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<Verb>
<Play EnglishTranslate="playing" />
</Verb>Edited by: itb402 on Mar 9, 2008 6:05 AM

in your code you are already appending new nodes to the root node. so what exactly is your problem? The following steps are usually taken for appending a new node:
1. Read the XML document
2. Build a DOM tree
3. Navigate to the node under which you want to insert the new node
4. Create a new node.
5. Insert the new node to the node selected in point #3.
~Debopam

Updating an existing xml file in java

Hi,
i need to update an existing xml file with new nodes. But i don.t know how to do that. i can read and write a new xml file . But updaton seems too difficult for me.
my xml structure is like this
<main_node>
<node1>
<name> name1</name1>
<id>ID</id>
</node1>
<node2>
<name2> name2</name2.
<id>ID</id>
</node2.
</main_node>
i want to insert node3 in this structure.
please help, it,s urgent;
Thanks in Advance

here is the code if ur using dom..
Node node4 = doc.createTextNode(name3);
Element element4=doc.createElement("name3");
element4.append(node4);
c one thing that u should take care here is that u have created and is reflected on ly in ur document object and not in xml..for that u have to write some more code like this
// This method writes a DOM document to a file
public static void writeXmlFile(Document doc, String filename) {
try {
// Prepare the DOM document for writing
Source source = new DOMSource(doc);
// Prepare the output file
File file = new File(filename);
Result result = new StreamResult(file);
// Write the DOM document to the file
Transformer xformer = TransformerFactory.newInstance().newTransformer();
xformer.transform(source, result);
} catch (TransformerConfigurationException e) {
} catch (TransformerException e) {
look this code..that will help u
regards
[email protected]

How can I affix Data to a existing XML file?

Hallo.
I have to write Data to an XML file. This I have to in a stacked Sequence within a while loop. How can I write my Data to my existing XML file without overwriting my existing Data from the loop before?
Thanks

I made the erroneous assumption that you were using your own XML creation code. The LabVIEW write to XML file VI overwrites the file every time. You can get around this behavior in a couple of ways.
Create your own write to XML VIs using the LabVIEW one as your base. The LabVIEW one write a header, writes your data, then writes the end tag. Split this up so that you open the file and write the header before your loop. During the loop, write your data. Write the end tag and close the file when you exit the loop. Don't overwrite the LabVIEW vi.lib function, or you will probably regret it. Copy it to a different location before you start your modifications.
Use the LabVIEW write to XML file for the first write of the loop. This will give you a file with a header and your first set of data. Still in the first loop iteration, reopen the file and position the file pointer on the start of the end tag (</LVData>). In subsequent loop operations, flatten your data to XML and write to the file directly using the file write primitive. When you exit your loop, write an end-of-line character and the end tag "</LVData>" and close the file.
If you need more detailed help on either of the above methods, let me know.
Out of curiosity, why are you saving your data as XML? There may be a better way to do it, depending on your application.
This account is no longer active. Contact ShadesOfGray for current posts and information.

Modify existing XML file

Ok I really need some help...What is the JAVA code that i need to add something to an existing XML file. Basically, I want to add a new tag at the end of another one. So I need to search the XML file for the end of one tag, and then add a new tag after that one. Please help.

Sounds like you think it's simple. There is a set of XML tutorials here:
http://java.sun.com/webservices/docs/1.0/tutorial/index.html
You probably need the one titled "Document Object Model" but it may help to read some of the others too.

How to modify an existing xml file from java code.

Hi
I have worked on creating a new xml file from java code using xmlbeans.But if i try to modify an already existing file using java code I am unable to get errorfree xmlfile.
For example if xml file(studlist.xml) is as below:
<?xml version="1.0" encoding="UTF-8"?>
<StudentList xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="D:\kchaitanya\xmlprac1\abc\Studlist.xsd">
     <Student>
          <Name>ram</Name>
          <Age>27</Age>
     </Student>
<Student>
          <Name>sham</Name>
          <Age>26</Age>
     </Student>
</StudentList>
Now suppose i have set name to victor using student.setName,
and set age to 20 using setAge from javacode,
the new xml file is as follows:
<?xml version="1.0" encoding="UTF-8"?>
<StudentList xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="D:\kchaitanya\xmlprac1\abc\Studlist.xsd">
     <Student>
          <Name>ram</Name>
          <Age>27</Age>
     </Student>
<Student>
          <Name>sham</Name>
          <Age>26</Age>
     </Student>
</StudentList>
<Student>
          <Name>victor</Name>
          <Age>20</Age>
     </Student>
As observed this is not a valid xml file.But how can i modify without any errors?

I know it's an old post, but I found this while doing a google search for something else, and don't like to leave it un-aswered
Just in case anyone has a similar problem... In this case the new elements have been appended outside of the root element
What you need to do is first get the root element and then append the new children to that, there are several ways of getting the root element, which depend on what you want to do with the elements you get back here's a simple (incomplete) way.
// gets the root element of the specified file (code not shown)
Element rootElement= new SAXReader().read(file).getRootElement();Then just append the new elements as below (this is non-generic code and would need to be modified for your situation)
// write a new student element
Element student = document.createElement("Student"); // creates the new student
rootElement.appendChild(student); // ***appends it to the root element***
Element name = document.createElement("Name"); // creates the name element
name.appendChild(document.createTextNode("Fred")); // adds the name text to the name element
student.appendChild(name); // appends the name to the student
Element age= document.createElement("Age"); // creates the age element
age.appendChild(document.createTextNode("26")); // adds the age text to the age element
student.appendChild(age); // appends the name to the studentThen flush ya buffers or whatever and write the file
Edited by: Dream-Scourge on Apr 23, 2008 11:10 AM

How to Update existing XML File Using Java Swing

Hi,
I am reading XML file and getting keywords into JList. When i add some keywords into JList through textfield and remove keywords JList, then after click on save button it should update xml file. How can i do it ?
Please provide me some code tips for updating xml file
This is the code that i am using for reading XML File:
import javax.swing.*;
import java.awt.event.*;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import java.io.IOException;
import java.util.*;
import java.text.Collator;
import java.util.regex.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import com.cloudgarden.layout.AnchorConstraint;
import com.cloudgarden.layout.AnchorLayout;
public class getKeywords extends JFrame implements ActionListener
static JPanel p;
static JLabel lbl;
static JButton btnSave,btnAdd,btnRemove;
static String path;
static Vector v;
static JList lstCur;
static JTextField txtKey;
Document dom;
static image imgval;
NodeList nodelstImage;
static AnchorLayout anchorLay;
private DefaultListModel lstCurModel;
public getKeywords()
     super("Current Keywords");
    v=new Vector();
    p=new JPanel();
    txtKey=new JTextField(10);
    btnAdd=new JButton("Add");
    btnRemove=new JButton("Remove");
    btnSave=new JButton("Save");
    lbl=new JLabel("Current Keywords");
    lstCurModel=new DefaultListModel();
        lstCur=new JList();
        JScrollPane scr=new JScrollPane(lstCur);
    runExample();
     lstCur.setModel(lstCurModel);
     p.add(lbl);
     p.add(scr);
     p.add(txtKey);
     p.add(btnAdd);
     p.add(btnRemove);
     p.add(btnSave);
     add(p);
     btnAdd.addActionListener(this);
     btnRemove.addActionListener(this);
     btnSave.addActionListener(this);
     setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
public static void main(String arg[])
     getKeywords g=new getKeywords();
     g.resize(250,400);
     g.setVisible(true);
public void actionPerformed(ActionEvent ae)
     if(ae.getSource()==btnAdd)
          lstCurModel.addElement(txtKey.getText());
     if(ae.getSource()==btnRemove)
          lstCurModel.remove(lstCur.getSelectedIndex());
     if(ae.getSource()==btnSave)
          //Code to Write
     public void runExample()
          //Parse the XML file and get the DOM object
          ParseXMLFile();
          //Get the Detail of the Image Document
          parseImageDocument();
          //Get the Detail of the LML Document
          //parseLMLDocument();
          //System.out.println(lmlval.Title);
     public void ParseXMLFile()
          //Get the Factory
          DocumentBuilderFactory builderFac = DocumentBuilderFactory.newInstance();
          try
               //Using factory get an instance of the Document Builder
               DocumentBuilder builder = builderFac.newDocumentBuilder();
               //parse using builder to get DOM representation of the XML file
               dom = builder.parse("LML.xml");
          catch(ParserConfigurationException pce)
               pce.printStackTrace();
          catch(SAXException sax)
               sax.printStackTrace();
          catch(IOException ioex)
               ioex.printStackTrace();
     public void parseImageDocument()
          //Get the root element
          Element docImgEle = dom.getDocumentElement();
          //Get a nodelist for <Image> Element
          nodelstImage = docImgEle.getElementsByTagName("Image");
          if(nodelstImage != null && nodelstImage.getLength() > 0)
               for(int i = 0; i < nodelstImage.getLength(); i++)
                    //Get the LML elements
                    Element el = (Element)nodelstImage.item(i);
                    //Get the LML object
                    getImage myImgval = new getImage();
                    imgval = myImgval.getimage(el);
                    v.addElement(new String(imgval.Thumb));
                    String[] x = Pattern.compile(",").split(imgval.Keys);
                    for (int s=0; s<x.length; s++)
                    lstCurModel.addElement(x[s].trim());
                    //System.out.println(x[s].trim());
}     Thanks
Nitin

You should update your DOM document to represent the changes that you want made.
Then, using the Transformation API you simply transform your document onto a stream representing your file. Something like this:
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
// TODO - set indentation amount!
Source source = new DOMSource(dom);
Result result = new StreamResult(file);
transformer.transform(source, result);Hope this helps.

Wrong path changes in Itunes XML file

hi there,
My Itunes library (9.0.2) is stored locally on my macbook, although actual files are on a network attached storage that I access through AFP. This share is mounted automatically when the mac starts. Everything was working perfectly fine until a few days ago (no major change to the library or mac), when my iphone synchonization started to report impossible to read on the device files.
After a few more investigations, I pinpointed some of the missing files, which were not missing but were replaced by other files (absolutely not linked to my media files).
the <key>Location</key> in the xml file was, for example
<key>Location</key><string>file://localhost/Volumes/David/docs/Me%CC%81dias/src/elodie2.jpg</string>
where it should have been something like
<key>Location</key><string>file://localhost/Volumes/David/media/music/albums/Damien%20Rice/9/09%20-%20Accid ental%20Babies.mp3</string>
Does anyone have a clue about what went wrong and how to circumvent this in the future ?
Thanks in advance

Oliver:
The simple answer is yes. Any changes you make to your RSS feed file (xml file) will eventually be updated by ITMS. Usually ITMS updates feed changes within 24 hours. However, the most recent changes I made in my feed files took almost 8 days before ITMS refreshed my listing.
One issue is clear. If you make changes to your image file, there is a high probability that when ITMS updates your database record, your listing in ITMS will show the broken link image for awhile. I've changed my image file twice, and each time, my ITMS listing showed the broken link image. Eventually the new image shows up, but it does take a long time for this day and age.
Good luck!

BC4J can't find existing xml file

hi, following a debug output with a "file not found" error.
the problem is, the file exist.
is it possible the container look in root directory?
[76] No xml file: /com/eautop/bc/master/master.xml, metaobj = com.eautop.bc.master.masterot directory
following the line around the error. i assume the outofmemory exception will be a follow up to the previous one.
any hints?
regards
wolfgang gillich
[65] Diagnostic Properties: Timing:false Functions:false Linecount:true Threshold:6
[66] JavaVMVersion: 1.3.0-1
[67] JavaVMVendor: Compaq Computer Corp.
[68] JavaVMName: Classic VM
[69] OperatingSystemName: OSF1
[70] OperatingSystemVersion: V4.0
[71] OperatingSystemUsername: oracle
[72] Connected to Oracle JBO Server - Version: 3.2.9.76.3
[73] {{+++ id=10000 type: 'BC4J_CREATE_ROOTAM' Create Root Application Module 'com.eautop.bc.master.MasterAppModule'
[74] {{+++ id=10001 type: 'METAOBJECT_LOAD' Loading meta-object: com.eautop.bc.master.MasterAppModule
[75] {{+++ id=10002 type: 'METAOBJECT_LOAD' Loading meta-object: com.eautop.bc.master.master
[76] No xml file: /com/eautop/bc/master/master.xml, metaobj = com.eautop.bc.master.master
[77] CSMessageBundle (language base) being initialized
[78] }}+++ End Event10003 null
[79] Cannot Load parent Package : com.eautop.bc.master.master
[80] Business Object Browsing may be unavailable
[81] No xml file: /com/eautop/bc/master/MasterAppModule.xml, metaobj = com.eautop.bc.master.MasterAppModule
[82] }}+++ End Event10002 null
java

Hello,
I'm trying to learn how to use an xml file to store user settings for an add in I'm creating. Up to this point, I've just used simple text files in the past that were structured a specific way. I thought I would try and learn to use XML for this after doing
some research online and came across this tutorial:
http://www.codeproject.com/Articles/8554/Application-Settings-the-NET-way-INI-Registry-or-X
I add the DataSet to my project, but when I get to the step where I'm supposed to add an element to the blank DataSet, I can't find the XML Schema toolbox items. I tried to manually add the toolbox items but couldn't find them. Does anyone know where they
are located so I can add them to my toolbox? Or perhaps another similar tutorial I could follow for creating an XML settings file that I can save to and read from easily for my add in. Since it is a dll, I can't use My.Settings, had already looked into that.
I appreciate any help offered, Thank you.
Is there a reason that you don't want to use Application Settings?
By the way - it's saved in XML format, not that that's really important.
Still lost in code, just at a little higher level.

Can we change the web.xml file name???????

can we change the name web.xml and struts-config.xml file to other name.....if yes, then how..........

you can change the name of struts-congig.xml file
and change the strut-config file name in web.xml also.
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <servlet>
        <servlet-name>action</servlet-name>
        <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
        <init-param>
            <param-name>config</param-name>
            <param-value>/WEB-INF/struts-config.xml</param-value>
        </init-param>And you also try rename the file web.xml and run the application and check what is happening...

Changing an existing XML-File

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