| | | DOM parser with all its actions displayed |
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import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.DocumentType;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Text;
import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
public class MainClass implements ErrorHandler {
public static void main(String args[]) throws Exception {
DocumentBuilderFactory builderFactory = DocumentBuilderFactory
.newInstance();
builderFactory.setNamespaceAware(true);
builderFactory.setValidating(true);
DocumentBuilder builder = null;
builder = builderFactory.newDocumentBuilder();
builder.setErrorHandler(new MainClass());
Document xmlDoc = null;
xmlDoc = builder.parse(new File("y.xml"));
listNodes(xmlDoc);
}
static void listNodes(Node node) {
String nodeName = node.getNodeName();
if (node instanceof Element) {
if (node.hasAttributes()) {
NamedNodeMap attrs = node.getAttributes();
for (int i = 0; i < attrs.getLength(); i++) {
Attr attribute = (Attr) attrs.item(i); // Get an attribute
System.out.println(" "+ attribute.getName()+ "="+attribute.getValue());
}
}
System.out.println(indent + "<" + nodeName + ">");
} else if (node instanceof Text) {
System.out.println(((Text) node).getData());
} else if (node instanceof DocumentType) {
System.out.println(getDoctypeString((DocumentType) node));
}
indent.append(' ');
NodeList list = node.getChildNodes();
if (list.getLength() > 0) {
for (int i = 0; i < list.getLength(); i++) {
listNodes(list.item(i));
}
}
System.out.println("</" + nodeName + ">");
}
public void fatalError(SAXParseException spe) throws SAXException {
System.out.println("Fatal error at line " + spe.getLineNumber());
System.out.println(spe.getMessage());
throw spe;
}
public void warning(SAXParseException spe) {
System.out.println("Warning at line " + spe.getLineNumber());
System.out.println(spe.getMessage());
}
public void error(SAXParseException spe) {
System.out.println("Error at line " + spe.getLineNumber());
System.out.println(spe.getMessage());
}
static StringBuffer indent = new StringBuffer("");
private static String getDoctypeString(DocumentType doctype) {
String str = doctype.getName();
StringBuffer doctypeStr = new StringBuffer("<!DOCTYPE ").append(str);
if ((str = doctype.getSystemId()) != null) {
doctypeStr.append(" SYSTEM ").append('\"').append(str).append('\"');
}
if ((str = doctype.getPublicId()) != null) {
doctypeStr.append(" PUBLIC ").append('\"').append(str).append('\"');
}
if ((str = doctype.getInternalSubset()) != null) {
doctypeStr.append('[').append(str).append(']');
}
return doctypeStr.append('>').toString();
}
}
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