How to parse nested xml file using dom
i want to parse nested xml file
please tell me how to parse nested xml
for eg.
<xml>
<row>
<name>Rahul<name>
<row><newXml>
<newXML>
<Row>
<code>12</code>
</Row>
<newXML>
<XML>
please tell how to parse this file
Normally if you have no idea about X, the first thing you should do is google "X tutorial". You will find plenty of them out there. And the advantage is, they are better written than whatever we spend two minutes throwing together here. Not to mention that it saves us the two minutes.
But if you have specific questions with your SAX parser when you get it going, then ask them here. Actually, ask them in the XML forum here, not this one.
Similar Messages
-
How to Parse an XML file using SAXParser in java.
Hi all
Am a bit new to XML files and have no idea about SAXParsers ... Now my problem is to parse this XML file below
<?xml version="1.0" encoding="UTF-8"?>
<sc:memory_segmentation xmlns:sc="sc_memory_segmentation.xsd">
<sc:architecture name="MPC55xx"></sc:architecture>
<sc:derivative name=""></sc:derivative>
<sc:configuration name=""></sc:configuration>
<sc:memory name="Internal ROM" type="ROM">
<sc:area-list>
<sc:area name="Bootmanager" type="BOOTMANAGER">
<sc:segment-list>
<sc:segment name="ROM page 1">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
</sc:segment-list>
</sc:area>
<sc:area name="Bootloader SWE" type="BOOTLOADER">
<sc:segment-list>
<sc:segment name="ROM page 2">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
<sc:segment name="ROM page 3">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
</sc:segment-list>
</sc:area>
<sc:area name="Application SWE 1" type="APPLICATION">
<sc:segment-list>
<sc:segment name="ROM page 4">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
<sc:segment name="ROM page 5">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
<sc:segment name="ROM page 6">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
<sc:segment name="ROM page 7">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
</sc:segment-list>
</sc:area>
<sc:area name="Application SWE 2" type="APPLICATION">
<sc:segment-list>
<sc:segment name="ROM page 8">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
</sc:segment-list>
</sc:area>
<sc:area name="Application SWE 3" type="APPLICATION">
<sc:segment-list>
<sc:segment name="ROM page 9">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
</sc:segment-list>
</sc:area>
<sc:area name="Application SWE 4" type="APPLICATION">
<sc:segment-list>
<sc:segment name="ROM page 10">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
</sc:segment-list>
</sc:area>
</sc:area-list>
</sc:memory>
<sc:memory name="Internal RAM" type="RAM">
<sc:area-list>
<sc:area name="RAM" type="RAM">
<sc:segment-list>
<sc:segment name="RAM page 1">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
<sc:segment name="RAM page 2">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
<sc:segment name="RAM page 3">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
<sc:segment name="RAM page 4">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
<sc:segment name="RAM page 5">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
</sc:segment-list>
</sc:area>
</sc:area-list>
</sc:memory>
<sc:memory name="Internal EEPROM" type="EEPROM">
<sc:area-list>
<sc:area name="EEPROM" type="EEPROM">
<sc:segment-list>
<sc:segment name="EEPROM page 1">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
<sc:segment name="EEPROM page 2">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
<sc:segment name="EEPROM page 3">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
<sc:segment name="EEPROM page 4">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
<sc:segment name="EEPROM page 5">
<sc:start></sc:start>
<sc:end></sc:end>
</sc:segment>
</sc:segment-list>
</sc:area>
</sc:area-list>
</sc:memory>
</sc:memory_segmentation> And from this file I need to make 3 Hashtables out of it one for ROM , RAM and EEPROM containg Segment information i.e. Segment start and end addresses and Area type of the segment....
If anyone could at least guide me with the basic commands and structure of the parser it would be really really great ...
Thanks a lot
AnishaNormally if you have no idea about X, the first thing you should do is google "X tutorial". You will find plenty of them out there. And the advantage is, they are better written than whatever we spend two minutes throwing together here. Not to mention that it saves us the two minutes.
But if you have specific questions with your SAX parser when you get it going, then ask them here. Actually, ask them in the XML forum here, not this one. -
How to parse the xml file using servlet
My scenario is like this:
<b>FILE-->XI-->J2EE Application</b>
XI sends the xml file to j2ee application. My servlet receives the file in HTTPRequest string.
How to parse that file using servlets.I should get the xml file as it is and should be displayed in the browser.
Can anyone please help me with code, its urgent.
Please help me!Download this java code
http://java.sun.com/webservices/jaxp/dist/1.1/docs/tutorial/sax/work/Echo02.java
in your servlet code you can write
public void doPost(req,resp){
DefaultHandler handler = new Echo02();
handler.parse(req.getInputStream());
Offcourse you will need to modify the code of Echo02 class a bit to suit your requirement which would finally retrun you a string and you can then write it using
respose.getWriter().write(responseString); -
Updating XML file using DOM parser
Hi,
Can someone help me, how to update following XML file using DOM parser.
The following is my XML file.
<students>
<student>
<id>1</id>
<name>abc</name>
</student>
<student>
<id>2</id>
<name>xyz</name>
</student>
<student>
<id>3</id>
<name/>
</student>
<student>
<id>4</id>
<name>ijk</name>
</student>
<student>
<id>5</id>
<name></name>
</student>
</students>Consider, I will input 2 fields, ie., id & name. For the matching Id, the name has to be updated.
Though, I have achieved this, but I am unable to update the value for 3rd record, & 5th record ie., id=3 & id=5. Since, these are blank.
Thanks.Some <name> elements have a child node which is a text node. From what you say it appears you know how to change those text nodes.
The other <name> elements don't have any child nodes. But you want one. This suggests to me that you need code that creates a text node and adds it to the <name> element as its child. -
I am a new learner to XML & JAVA,I dont't know how to parse the XML file using JAXP,Who can tell me,Who can write an Example?
thx
Best Regards.Using the SAXParser in JAXP the parsing of the XML file is event driven.
Instantiate the parser:
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
InputSource is = new InputSource(new FileReader(theXML));call the parse method:
parser.parse(is, this);The following events are fired as the parser works through the XML public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws org.xml.sax.SAXException
public void endElement(String namespaceURI, String localName, String qName) throws org.xml.sax.SAXException
characters(char[] ch, int start, int length)etc.
You write what you want within each of these sections to handle the structure of your data. Keep in mind SAX is useful only when you know the structure of your XML. -
Parsing an xml file using xerces DOM parser
Hi
I want to parse a simple xml file using DOM parser.
The file is
<Item>
<SubItem>
<title>SubItem0</title>
<attr1>0</attr1>
<attr2>0</attr2>
<attr3>0</attr3>
</SubItem>
<SubItem>
<title>SubItem1</title>
<attr1>1</attr1>
<attr2>0</attr2>
<attr3>0</attr3>
</SubItem>
<SubItem>
<title>SubItem2</title>
<attr1>1</attr1>
<attr2>1</attr2>
<attr3>0</attr3>
<SubItem>
<title>SubItem20</title>
<attr1>2</attr1>
<attr2>1</attr2>
<attr3>0</attr3>
</SubItem>
<SubItem>
<title>SubItem21</title>
<attr1>1</attr1>
<attr2>1</attr2>
<attr3>0</attr3>
</SubItem>
</SubItem>
</Item>
I just want to parse this file and want to store the values in desired datastructures,
I am trying using DOM parser, since it gives a tree structure, which is ok in this case.
public void init()
InputReader ir =new InputReader("Habsys");
Document doc =ir.read("Habitat");
System.out.println(doc);
traverse(doc);
private void traverse(Document idoc)
NodeList lchildren=idoc.getElementsByTagName("SubItem");
for(int i=0;i<lchildren.getLength();i++)
String lgstr=lchildren.item(i).getNodeName();
if(lgstr.equals("SubItem"))
traverse(lchildren.item(i));
private void traverse (Node node) {
int type = node.getNodeType();
if (type == Node.ELEMENT_NODE)
System.out.println ("Name :"+node.getNodeName());
if(!node.hasChildNodes())
System.out.println ("Value :"+node.getNodeValue());
NodeList children = node.getChildNodes();
if (children != null) {
for (int i=0; i< children.getLength(); i++)
traverse (children.item(i));
But I am not getting required results, a lot of values I am getting as null
Could anybody tell me how to retrieve the data from the xml file, I simply want to read data and store it in data structures. For eg, for tag Subitem with title as ' SubItem1' has attr1 as '1', attr2 as'0' and attr3 as '0'.
Thanks
GauravCheck This Sample Code....
public void amethod(){
DocumentBuilderFactory dbf = null;
DocumentBuilder docBuilder = null;
Document doc = null;
try{
dbf = DocumentBuilderFactory.newInstance();
db = dbf.newDocumentBuilder();
doc = db.parse(New File("path/to/your/file"));
Node root = doc.getDocumentElement();
System.out.println("Root Node = " + root.getNodeName());
readNode(root);
}catch(FactoryConfigurationError fce){ fce.printStackTrace();
}catch(ParserConfigurationException pce){ pce.printStackTrace();
}catch(IOException ioe){ ioe.printStackTrace();
}catch(SAXException saxe){ saxe.printStackTrace();
private void readNode(Node node) {
System.out.println("Current Node = " + node.getNodeName());
readAttributes(node);
readChildren(node);
private void readAttributes(Node node) {
if (!node.hasAttributes())
return;
System.out.println("Attributes:");
NamedNodeMap attrNodes = node.getAttributes();
for (int i=0; i<attrNodes.getLength(); i++) {
Attr attr = (Attr)attrNodes.item(i);
System.out.println(attr.getNodeName() + " => " + attr.getNodeValue());
private void readChildren(Node node) {
if (!node.hasChildNodes())
return;
System.out.println("Value/s:");
NodeList childNodes = node.getChildNodes();
for (int i=0; i<childNodes.getLength(); i++) {
Node child = (Node)childNodes.item(i);
if (child.getNodeType() == Node.ELEMENT_NODE) {
readNode(child);
continue;
if (child.getNodeType() == Node.TEXT_NODE) {
if (child.getNodeValue()!=null)
System.out.println(child.getNodeValue()); -
How to create new XML file using retreived XML content by using SAX API?
hi all,
* How to create new XML file using retreived XML content by using SAX ?
* I have tried my level best, but output is coming invalid format, my code is follows,
XMLFileParser.java class :-
import java.io.StringReader;
import java.io.StringWriter;
import javax.xml.transform.OutputKeys;
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.DOMResult;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.sax.TransformerHandler;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.XMLFilterImpl;
public class PdfParser extends XMLFilterImpl {
private TransformerHandler handler;
Document meta_data;
private StringWriter meta_data_text = new StringWriter();
public void startDocument() throws SAXException {
void startValidation() throws SAXException {
StreamResult streamResult = new StreamResult(meta_data_text);
SAXTransformerFactory factory = (SAXTransformerFactory) SAXTransformerFactory.newInstance();
try
handler = factory.newTransformerHandler();
Transformer transformer = handler.getTransformer();
transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
handler.setResult(streamResult);
handler.startDocument();
catch (TransformerConfigurationException tce)
System.out.println("Error during the parse :"+ tce.getMessageAndLocation());
super.startDocument();
public void startElement(String namespaceURI, String localName,
String qualifiedName, Attributes atts) throws SAXException {
handler.startElement(namespaceURI, localName, qualifiedName, atts);
super.startElement(namespaceURI, localName, qualifiedName, atts);
public void characters(char[] text, int start, int length)
throws SAXException {
handler.characters(text, start, length);
super.characters(text, start, length);
public void endElement(String namespaceURI, String localName,
String qualifiedName) throws SAXException {
super.endElement("", localName, qualifiedName);
handler.endElement("", localName, qualifiedName);
public void endDocument() throws SAXException {
void endValidation() throws SAXException {
handler.endDocument();
try {
TransformerFactory transfactory = TransformerFactory.newInstance();
Transformer trans = transfactory.newTransformer();
SAXSource sax_source = new SAXSource(new InputSource(new StringReader(meta_data_text.toString())));
DOMResult dom_result = new DOMResult();
trans.transform(sax_source, dom_result);
meta_data = (Document) dom_result.getNode();
System.out.println(meta_data_text);
catch (TransformerConfigurationException tce) {
System.out.println("Error occurs during the parse :"+ tce.getMessageAndLocation());
catch (TransformerException te) {
System.out.println("Error in result transformation :"+ te.getMessageAndLocation());
} CreateXMLFile.java class :-
Sax.startDocument();
Sax.startValidation();
Sax.startElement("", "pdf", "pdf", new AttributesImpl());
Sax.startElement("", "basic-metadata", "basic-metadata", new AttributesImpl());
String xmp_str = new String(meta_data.getByteArray(),"UTF8");
char[] xmp_arr = xmp_str.toCharArray();
Sax.characters(xmp_arr, 0, xmp_arr.length);
Sax.endElement("", "pdf", "pdf");
Sax.endValidation();
Sax.endDocument();
Sax.endElement("", "basic-metadata", "basic-metadata");* In CreateXMLFile.java
class, I have retreived the xml content in the meta_data object, after that i have converted into character array and this will be sends to SAX
* In this case , the XML file created successfully but the retreived XML content added as an text in between basic-metadata Element, that is, retreived XML content
is not an XML type text, it just an Normal text Why that ?
* Please help me what is the problem in my code?
Cheers,
JavaImranSax.startDocument();
Sax.startValidation();
Sax.startElement("", "pdf", "pdf", new AttributesImpl());
Sax.startElement("", "basic-metadata", "basic-metadata", new AttributesImpl());
String xmp_str = new String(meta_data.getByteArray(),"UTF8");
char[] xmp_arr = xmp_str.toCharArray();
Sax.characters(xmp_arr, 0, xmp_arr.length);
</code><code>Sax.endElement("", "basic-metadata", "basic-metadata");</code>
<code class="jive-code jive-java">Sax.endElement("", "pdf", "pdf");
Sax.endValidation();
Sax.endDocument();
* I HAVE CHANGED MY AS PER YOUR SUGGESTION, NOW SAME RESULT HAS COMING.
* I AM NOT ABLE TO GET THE EXACT OUTPUT.,WHY THAT ?
Thanks,
JavaImran{code} -
Parsing a XML file using Jdom-Problem.
Hi all,
I am reposting it as I was told to format the code and send it again.
I am trying to parse a xml file using a jdom java code.This code works fine if I remove xmlns attribute in the root element. (I get the expected result) .If the "xmlns" attribute is put in the xml as it should be then the parsing and retrieving returns null. Please tell me how to fix this issue.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Xml
<process name="CreateKBEntryService" targetNamespace="http://serena.com/CreateKBEntryService" suppressJoinFailure="yes" xmlns:tns="http://serena.com/CreateKBEntryService" xmlns="http://schemas.xmlsoap.org/ws/2003/03/business-process/" xmlns:bpelx="http://schemas.oracle.com/bpel/extension" xmlns:ora="http://schemas.oracle.com/xpath/extension" xmlns:nsxml0="http://localhost:8080/axis/services/CreateKBEntryService" xmlns:nsxml1="http://DefaultNamespace" xmlns:bpws="http://schemas.xmlsoap.org/ws/2003/03/business-process/">
<partnerLinks>
<partnerLink name="client" partnerLinkType="tns:CreateKBEntryService" myRole="CreateKBEntryServiceProvider"/>
<partnerLink name="CreateKBEntryPartnerLink" partnerLinkType="nsxml0:CreateKBEntryLink" partnerRole="CreateKBEntryProvider"/>
</partnerLinks>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`
Java:
import java.io.*;
import java.util.*;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
public class sample1 {
public static void main(String[] args) throws Exception {
// create a XML parser and read the XML file
SAXBuilder oBuilder = new SAXBuilder();
Document oDoc = oBuilder.build(new File("**xml file location**"));
Element root = oDoc.getRootElement();
System.out.println(root.getName());
String tgtns= root.getAttributeValue("targetNamespace");
System.out.println("tgt ns "+ tgtns);
List list= root.getChildren("partnerLinks");
Iterator it1= list.iterator();
System.out.println("Iterator 1 - "+list.size());
while(it1.hasNext()){
Element partnerlinks = (Element)it1.next();
List list2= partnerlinks.getChildren("partnerLink");
System.out.println("iterator 2 - "+list2.size());
}~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Result:
Without Xmlns in xml file(Expected and correct output)
process
tgt ns http://serena.com/CreateKBEntryService
Iterator 1 - 1//expected and correct result that comes when I remove xmlns attribute from xml
iterator 2 - 2
Result with xmlns:
process
tgt ns http://serena.com/CreateKBEntryService
Iterator 1 - 0 //instead of 0 should return 1LOL
This is what you get for working 12 hours straight....
I changed:
xmlObject["mydoc"]["modelglue"]["event-handlers"]["event-handler"][i].xmlAttrib utes["name"]<br>
to:
#mydoc["modelglue"]["event-handlers"]["event-handler"][i].xmlAttrib utes["name"]#<br>
xmlObject is the name of my xml object in memory, and then you reference from the root of the xml doc down the chain.
Sorry for the inconvenience,
Rich -
How quickly parse big XML file (60 MB) ???
How quickly parse big XML file (60 MB) ???
I assume you mean load it into XML DB ?. Fundamentally your document is about the upper limit for 9.2.x. I would strongly recommend trying to break it up into a set of smaller documents using a SAX parser before trying to load it into XML DB. In 10g it should be possible to load much bigger documents than this.
-
Problem writing xml file using DOM
Hi,
I am trying to write a xml file using DOM. I am using xalan 2.5, xerces 1.4.4, jdk 1.3.1 in JRun 3 on windows.
The code where I get exception :
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer();
transformer.transform(new DOMSource(doc), new StreamResult("pr.xml"));
I get the runtime error as follows:
javax.servlet.ServletException: null
java.lang.NoSuchMethodError
at org.apache.xml.utils.DOM2Helper.getNamespaceOfNodeDOM2Helper.java:342)
at org.apache.xml.utils.TreeWalker.startNode(TreeWalker.java:387)
at org.apache.xml.utils.TreeWalker.traverse(TreeWalker.java:202)
at org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:343)
Thinking it is because of classpath, I placed xalan 2.5, xerces 1.4.4 jar files in jrun admin lib directory and in server lib directory as well. Still getting the same error.
Any suggestion?
Thanks in advancexalan is included in JRun 4. However JRun 3 does not.
However I tried with the same code in JRun3 in different system. The error is completely different. I understand this is because of different version of files. trying to solve ;)
Here my new exception
javax.servlet.ServletException: org/w3c/dom/ranges/DocumentRange
java.lang.NoClassDefFoundError: org/w3c/dom/ranges/DocumentRange
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:493)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:111)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:248)
at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:286)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:493)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:111)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:248)
at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:286)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
at org.apache.xerces.jaxp.DocumentBuilderImpl.(Unknown Source)
at org.apache.xerces.jaxp.DocumentBuilderFactoryImpl.newDocumentBuilder(Unknown Source)
at com.cybell.appl.deliveryorder.cmd.CreateXMLDOFile.createFile(CreateXMLDOFile.java:73)
at com.cybell.appl.deliveryorder.cmd.CreateXMLDOFile.execute(CreateXMLDOFile.java:36)
at com.cybell.appl.framework.cmd.BaseCommand.start(BaseCommand.java:50)
at com.cybell.appl.framework.control.BaseController.service(BaseController.java:38)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:865)
at allaire.jrun.servlet.JRunSE.service(../servlet/JRunSE.java:1013)
at allaire.jrun.servlet.JRunSE.runServlet(../servlet/JRunSE.java:925)
at allaire.jrun.servlet.JRunNamedDispatcher.forward(../servlet/JRunNamedDispatcher.java:34)
at allaire.jrun.servlet.Invoker.service(../servlet/Invoker.java:84)
at allaire.jrun.servlet.JRunSE.service(../servlet/JRunSE.java:1013)
at allaire.jrun.servlet.JRunSE.runServlet(../servlet/JRunSE.java:925)
at allaire.jrun.servlet.JRunRequestDispatcher.forward(../servlet/JRunRequestDispatcher.java:88)
at allaire.jrun.servlet.JRunSE.service(../servlet/JRunSE.java:1131)
at allaire.jrun.servlet.JvmContext.dispatch(../servlet/JvmContext.java:330)
at allaire.jrun.http.WebEndpoint.run(../http/WebEndpoint.java:107)
at allaire.jrun.ThreadPool.run(../ThreadPool.java:272)
at allaire.jrun.WorkerThread.run(../WorkerThread.java:75) -
SAX: How to create new XML file using SAX parser
Hi,
Please anybody help me to create a XML file using the Packages in the 5.0 pack of java. I have successfully created it reading the tag names and values from database using DOM but can i do this using SAX.
I am successful to read XML using SAX, now i want to create new XML file for some tags and its values using SAX.
How can i do this ?
Sachin KulkarniSAX is a parser, not a generator.Well,
you can use it to create an XML file too. And it will take care of proper encoding, thus being much superior to a normal textwriter:
See the following code snippet (out is a OutputStream):
PrintWriter pw = new PrintWriter(out);
StreamResult streamResult = new StreamResult(pw);
SAXTransformerFactory tf = (SAXTransformerFactory) TransformerFactory.newInstance();
// SAX2.0 ContentHandler.
TransformerHandler hd = tf.newTransformerHandler();
Transformer serializer = hd.getTransformer();
serializer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");//
serializer.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM,"pdfBookmarks.xsd");
serializer.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM,"http://schema.inplus.de/pdf/1.0");
serializer.setOutputProperty(OutputKeys.METHOD,"xml");
serializer.setOutputProperty(OutputKeys.INDENT, "yes");
hd.setResult(streamResult);
hd.startDocument();
//Get a processing instruction
hd.processingInstruction("xml-stylesheet","type=\"text/xsl\" href=\"mystyle.xsl\"");
AttributesImpl atts = new AttributesImpl();
atts.addAttribute("", "", "someattribute", "CDATA", "test");
atts.addAttribute("", "", "moreattributes", "CDATA", "test2");
hd.startElement("", "", "MyTag", atts);
String curTitle = "Something inside a tag";
hd.characters(curTitle.toCharArray(), 0, curTitle.length());
hd.endElement("", "", "MyTag");
hd.endDocument();
You are responsible for proper nesting. SAX takes care of encoding.
Hth
;-) stw -
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
NitinYou 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. -
How to retrieve data (xml file) using jsp
I am a newbie to xml. I have decided to store my information in the xml file. may I know how can I retrieve my information from the xml file?
Thanx in advance.I am a newbie to xml. I have decided to store my
information in the xml file. may I know how can I
retrieve my information from the xml file?
Thanx in advance.You can get the information from the XML file using one of the parsers available, such as Xerces http://xml.apache.org, and JDOM as an API.
Using this you have the option of having a SAXParser or a DOMParser.
SAX (Simple API for XML) is an event based parser, so if you know the XML structure, and need to find a certain element, you can just look for the element name,and retrieve the value of the element, it's attributes and its children.
DOM(Document Object Model)represents the XML as a tree, but uses more resources as it stores the entire tree in memory. But it is good in that you can traverse the whole tree.
JDOM would be a good idea too. If you download this, you can use it's API, which is very good, that will use the parser on your system (Xerces). I would definately recommend JDOM. -
I need to parse large xml file which contains following tag. The size of the file is upto 10MB-50MB or more.
<departments>
<department>
<a_depart id="124">
<b_depart id="Bss_253">
<bss_depart id="253">
<attributes>
<name_one>abc</name_one>
</attributes>
</bss_depart id="253">
</b_depart id="Bss_253">
</a_depart id="124">
</department>
<department>
<a_depart id="124">
<b_depart id="Bss_254">
<mss_depart id="253">
<attributes>
<name_one>abc</name_one>
<name_two>xyz</name_one>
</attributes>
</mss_depart>
</b_depart>
</a_depart>
</department>
<department>
<a_depart id="124">
<b_depart id="Bss_254">
<mss_depart id="255">
<attributes>
<name_one>abc</name_one>
<name_two>xyz</name_one>
</attributes>
</mss_depart>
</b_depart>
</a_depart>
</department>
<department>
<a_depart id="125">
<b_depart id="Bss_254">
<mss_depart id="253">
<attributes>
<name_one>abc</name_one>
<name_two>xyz</name_one>
</attributes>
</mss_depart>
</b_depart>
</a_depart>
</department>
I want to get the infomation for that xml file. like mss_depart id=233, building xpath dyanmically for every id and loading
that using dom4j. which is very very slow.
Is there any other solution for that to read the data using sax parser only.
I want to execute the xpath or data for the following way.
//a_depart/@id ------> all the ids of a_depart tags if it returns 3 values say 123,124,125
after that i want to execute
//a_depart[@id='123']/b_depart/@id like this ...to retrive the values of all the levels ...
I am executing following xpath for every unique ids at all levels.
List l = doc.selectNodes(xPathForID);
List l1 = doc.selectNodes(xPathForAttributes+attributes.get(j)+"/text()");
But it is very slow and taking lot of time.
Is there any other way to solve this problem. If any please mail me it is urgent.
I am using jdk1.4 and jdk1.5
Is there any support for sax parser to execute xpath in jdk1.5 direclty, with out using dom4j
Thanks in advance....I doubt you will find a preexisting solution to your problem.
SAX is usually recommended for processing big files (where "big" is undefined"). It works on big files by avoiding the messy problem of storing the data -- that is left as an exercise to you.
DOM (and its variants) works by building a Document object as the head of the tree of objects for the entire contents. With DOM, you can then use XPath, because there is something to search that is already in memory. To use XPath, you seem to have two choices, build a DOM-ish tree, or if you can find an XPath processor (I'm not sure if one exists) that can process the XML file directly, but it will be slow, since you are looking for "all" occurences of an attribute, and this means you have to read the entire file each time.
It might be worth exploring a hybrid approach -- use SAX to get some information, and build your own objects to store the data. Maybe a HashMap as the main index. But, that will keep you from using XPath, since you do not have the data structures it expects.
A third alternative would be to look at JAXB. It builds Java code from a Schema of your data and then when you import the data, it creates the necessary objects and fills in values. But, I don't think XPath woll work there either.
Dave Patterson -
Parsing a XML file using bracket notation
Hi Gang-
I have been given the task to parse a .xml file.
The xml file contains element names that contain hyphens, so I've read that bracket notation is the only way to go. According to Ben Forta I have built the following code, but because of what I believe to be a simple syntax issue that I simply cannot put my finger on I can not get it to work:
1. <cffile action="read" file="/Applications/Coldfusion8/wwwroot/config/ModelGlue.xml" variable="xmldoc">
2. <cfset mydoc=XmlParse(xmldoc)>
3. <cfset newLen=#arraylen(mydoc.modelglue.xmlchildren[2].xmlChildren)#>
4. <cfoutput>
5. <cfloop from="1" to="#newLen#" index="i">
6. xmlObject["mydoc"]["modelglue"]["event-handlers"]["event-handler"][i].xmlAttributes["name "]<br>
7. </cfloop>
8. </cfoutput>
When I run the code line 6 literally appears on screen the proper amount of times, according to the "to" value in my loop.
I tried putting pound signs around line 6 but it returns an error saying that "... xmlObject is undefined..."
Because of the hyphens it seems that I'm forced to use the bracket notation (I'm OK with that) but does anyone know how to render line 6 to obtain the value?
Thanks in advance,
RichLOL
This is what you get for working 12 hours straight....
I changed:
xmlObject["mydoc"]["modelglue"]["event-handlers"]["event-handler"][i].xmlAttrib utes["name"]<br>
to:
#mydoc["modelglue"]["event-handlers"]["event-handler"][i].xmlAttrib utes["name"]#<br>
xmlObject is the name of my xml object in memory, and then you reference from the root of the xml doc down the chain.
Sorry for the inconvenience,
Rich
Maybe you are looking for
-
Hww to implement Sender function in XSLT
Hi kindly any one give me a idea about implementing the sender function present in graphical mapping usinfg XSLT sender > fixedvalues> xxx(field in receiver) this flow is in graphical mapping. how will i implement the above logic using XSLT. kindly h
-
Connect with different server for debugging
hi to all, is it possible to connect to a different server for debugging? this is to share the development environment !! please advise.
-
Hi, We are trying evaluate the best command line PGP encryption software that we may be able to call from within PI 7.1I. Any recommendations regarding this are greatly appreciated. Thanks Teja
-
Producer content no showing after log on.
I created a federated portal network with a Producer EP7.0 SP9 and a Consumer EP7.0 SP10. Everything works fine, but .. On the consumer portal I have a test user assigned to a producer role. When I log on with the test user, no navigation or content
-
"No Mac Can Handle" professional Orchestral sample libraries?
Hi, What I do: Film / TV / Ensemble composer Sample Libraries I use: As my normal palate; Symphonic Choirs, LA Scoring Strings, Vienna Woodwinds, Project Sam Orchestral Brass, Storm Drum 2. Plus others for colour. I WILL be expanding this in the fut