Source Code : Use DOM parser to deal with XML document with attributes

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Use DOM parser to deal with XML document with attributes

         

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 MainClass 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 MainClass());
    Document xmlDoc = builder.parse(new File("y.xml"));
    DocumentType doctype = xmlDoc.getDoctype();
    System.out.println("DOCTYPE node:
" + doctype);
    listNodes(xmlDoc.getDocumentElement(), "");
  }

  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(indent + " " + node);

    if (node instanceof Element && node.hasAttributes()) {
      System.out.println(indent + "Element Attributes are:");
      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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