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.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
public class TryDOM implements ErrorHandler {
public static void main(String args[]) throws Exception {
DocumentBuilderFactory builderFactory = DocumentBuilderFactory
.newInstance();
builderFactory.setNamespaceAware(true);
builderFactory.setValidating(true);
builderFactory.setIgnoringElementContentWhitespace(true);
DocumentBuilder builder = null;
builder = builderFactory.newDocumentBuilder();
builder.setErrorHandler(new TryDOM());
Document xmlDoc = builder.parse(new File("y.xml"));
DocumentType doctype = xmlDoc.getDoctype();
System.out.println("DOCTYPE node:\n" + getDoctypeString(doctype));
listNodes(xmlDoc.getDocumentElement(), "");
}
private static String getDoctypeString(DocumentType doctype) {
String str = doctype.getName();
StringBuffer doctypeStr = new StringBuffer("<!DOCTYPE ").append(str);
final char QUOTE = '\"';
if ((str = doctype.getSystemId()) != null)
doctypeStr.append(" SYSTEM ").append(QUOTE).append(str).append(QUOTE);
else if ((str = doctype.getPublicId()) != null) // Check for a public ID
doctypeStr.append(" PUBLIC ").append(QUOTE).append(str).append(QUOTE);
if ((str = doctype.getInternalSubset()) != null)
doctypeStr.append('[').append(str).append(']');
return doctypeStr.append('>').toString(); // Append '>', return the string
}
static void listNodes(Node node, String indent) {
String nodeName = node.getNodeName();
System.out.println(indent + nodeName + " Node, type is "
+ node.getClass().getName() + ":");
System.out.println(node);
if (node instanceof Element && node.hasAttributes()) {
NamedNodeMap attrs = node.getAttributes();
for (int i = 0; i < attrs.getLength(); i++) {
Attr attribute = (Attr) attrs.item(i);
System.out.println(indent + attribute.getName() + "="
+ attribute.getValue());
}
}
NodeList list = node.getChildNodes();
if (list.getLength() > 0) {
System.out.println(indent + "Child Nodes of " + nodeName + " are:");
for (int i = 0; i < list.getLength(); i++)
listNodes(list.item(i), indent + " ");
}
}
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());
}
}
<?xml version="1.0"?>
<!DOCTYPE circle
[
<!ELEMENT circle (position)>
<!ATTLIST circle
radius CDATA #REQUIRED
>
<!ELEMENT position EMPTY>
<!ATTLIST position
x CDATA #REQUIRED
y CDATA #REQUIRED
>
]>
<circle radius="15">
<position x="30" y="50"/>
</circle>
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