• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

Getting Node Value using SAX

 
Ranch Hand
Posts: 265
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi

Can any body tell us how to get the node value using SAX.
I have one xml as follows
<One>
<TABLE name="dress">
<TR>
<TD name="id">18</TD>
<TD name="number">3</TD>
</TR>
</TABLE>
</One>

Can any body tell us where i am wrong with this code for geting the element node values (<TD> like 18 and 3 for the particular node <one>?


import java.util.*;
import java.io.*;
import org.xml.sax.*;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.ParserConfigurationException;

import java.text.DateFormat;
import java.text.SimpleDateFormat;


public class SaxReader implements ContentHandler {

boolean flag = false;

StringBuffer sbf = new StringBuffer();

/**
* Field tagName
*/
private String tagName_;

/**
* Field tagValue
*/
private StringBuffer tagValue_;

/**
* Field loanPurpose
*/
private String loanPurpose;

/**
* Field ErrorList
*/
private ArrayList ErrorList = new ArrayList();

/**
* Field Data
*/
private HashMap Data = new HashMap();

/**
* Constructor SAXDataSource
* @param xml java.io.Reader
* @throws IOException
*/

public SaxReader(Reader xml) throws IOException {

try {

SAXParserFactory saxParserFactory =
SAXParserFactory.newInstance();
saxParserFactory.setValidating(true);
SAXParser sp = saxParserFactory.newSAXParser();

ErrorHandler handler = new ErrorHandler() {
public void warning(SAXParseException e) throws
SAXException {
ErrorList.add(e.getMessage());
}
public void error(SAXParseException e) throws
SAXException {
ErrorList.add(e.getMessage());

}
public void fatalError(SAXParseException e)
throws SAXException {
ErrorList.add(e.getMessage());
throw e;
}
};

XMLReader parser = sp.getXMLReader();

parser.setContentHandler(this);
parser.setErrorHandler(handler);
parser.parse(new InputSource(xml));


} catch (IOException e) {
throw e;
} catch (SAXException e) {

e.getMessage();
} catch (Throwable x) {
x.printStackTrace();
}
}

public void startElement(String namespaceURI, String localName,String qName, Attributes atts) {


// Get the number of attribute

int length = atts.getLength();
System.out.println("length.."+length + "localname"+ localName);

// Process each attribute
for (int i=0; i<length; i++) {
// Get names and values for each attribute
String name = atts.getQName(i);
String value = atts.getValue(i);
System.out.println("name=="+name+">>"+value);
System.out.println("loop qname values.."+qName);
System.out.println("qName.."+qName +"sds" + atts.getValue(namespaceURI,qName));
// The following methods are valid only if the parser is namespace-aware
}
}
/**
* Method endElement
*/
int count=0;
public void endElement(String nsURI, String localName, String qName) throws SAXException {

if(count >0) {
count=0;
}
if (qName.equals("TABLE")) {
flag = false;
sbf.append("</" + qName + ">");
System.out.println(sbf.toString());
count=1;
sbf=new StringBuffer();

}

if (flag) {
sbf.append("</" + qName + ">");

}
}

/**
* Field echo
*/

private boolean echo = false;

/**
* Method characters This method is used to obtain the
value
for required Tags.
*
* @param chars char[]
* @param pos
* @param len
* @exception SAXException
*/

public void characters(char[] chars, int pos, int len)
throws SAXException {

if (tagName_ != null && tagValue_ != null) {
String value = new String(chars, pos, len);
System.out.println("this is new...."+ value);
tagValue_.append(value);
Data.put(tagName_, tagValue_);

tagName_ = null;
tagValue_ = null;
}

if (flag) {
String value = new String(chars, pos, len);
sbf.append(value.trim());

}

}

/**
* Method getData This method returns the
* @return HashMap
*/

public HashMap getData() {
return this.Data;
}

public void endDocument() throws SAXException {
}
public void endPrefixMapping(String arg1) throws SAXException {
}
public void ignorableWhitespace(char[] chars, int pos, int len)
throws SAXException {
}
public void processingInstruction(String arg1, String arg2)
throws SAXException {
}
public void setDocumentLocator(Locator arg1) {
}
public void skippedEntity(String arg1) throws SAXException {
}
public void startDocument() throws SAXException {
}
public void startPrefixMapping(String arg1, String arg2)
throws SAXException {
}

/**
* Method main for Testing
*
*/

public static void main(String[] args) {
try {

SaxReader ds = new SaxReader(new FileReader("one.xml"));
} catch (Throwable x) {
x.printStackTrace();
}
}
}


With the above i am getting output like this

name
id
-----
name
number


Regards
Reddy
 
Consider Paul's rocket mass heater.
reply
    Bookmark Topic Watch Topic
  • New Topic