JDOM与XML的案例

2019-11-18 14:49:00

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import java.io.IOException;
import java.util.Iterator;
import java.util.List;

import org.jdom.Comment;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.PRocessingInstrUCtion;
import org.jdom.input.DOMBuilder;
import org.jdom.input.SAXBuilder;
import org.jdom.output.DOMOutputter;

/*
* Simple demo of JDOM
*/
public class JDOMDemo {

    public static void main(String[] args) {
    // Must be at least one file or URL argument
        if (args.length == 0) {
            System.out.println("Usage: java JDOMDemo URL [...]");
        }
        SAXBuilder saxBuilder = new SAXBuilder();
        DOMBuilder domBuilder = new DOMBuilder();
        for (int i = 0; i < args.length; i++) {
            try {
                Document jdomDocument = saxBuilder.build(args[i]);

                DOMOutputter domOutputter = new DOMOutputter();

                /*
                 * Test getting DOM Document from JDOM Document
                org.w3c.dom.Document domDocument = domOutputter.output(doc);
                 */

                /*
                 * Test getting DOM Element from JDOM Element
                 */
                org.w3c.dom.Element domElement =
                  domOutputter.output(jdomDocument.getRootElement());

                /*
                 * Test getting JDOM Element from DOM Element
                 */
                org.jdom.Element jdomElement = domBuilder.build(domElement);
                demo(jdomElement);

            } catch (JDOMException e) { // indicates a well-formedness or other error
                System.out.println(args[i] + " is not a well formed xml document.");
                System.out.println(e.getMessage());
            } catch (IOException ex) {
        System.out.println("Input or Output error:" +
          args[i] + ": " + ex);
      }
        }
    }

    public static void demo(Document doc) {

        List children = doc.getContent();
        Iterator iterator = children.iterator();
        while (iterator.hasNext()) {
            Object o = iterator.next();
            if (o instanceof Element) {
                demo((Element) o);
            }
            else if (o instanceof Comment)
        doComment((Comment) o);
            else if (o instanceof ProcessingInstruction)
        doPI((ProcessingInstruction) o);
        }
    }

    public static void demo(Element element) {
    System.out.println("Element " + element);

        List attributes = element.getAttributes();
        List children = element.getContent();
        Iterator iterator = children.iterator();
        while (iterator.hasNext()) {
            Object o = iterator.next();
            if (o instanceof Element) {
                demo((Element) o);
            }
            else if (o instanceof Comment)
        doComment((Comment)o);
            else if (o instanceof ProcessingInstruction)
        doPI((ProcessingInstruction)o);
            else if (o instanceof String) {
                System.out.println("String: " + o);
            }
        }
    }

  public static void doComment(Comment c) {
    System.out.println("Comment: " + c);
  }

  public static void doPI(ProcessingInstruction pi) {
    System.out.println("PI: " + pi);
  }
}
// demo xml file
/*
<?xml version="1.0"?>
<people>
<person>
  <name>Ian Darwin</name>
  <email>http://www.darwinsys.com/</email>
  <country>Canada</country>
</person>
<person>
  <name>Another Darwin</name>
  <email type="intranet">afd@node1</email>
  <country>Canada</country>
</person>
</people>

*/

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