www.pudn.com > chap1.rar > LibraryJDOMCreator.java

package chap1; 
 
import java.io.*; 
import java.util.*; 
import org.jdom.DocType; 
import org.jdom.Document; 
import org.jdom.Element; 
import org.jdom.output.XMLOutputter; 
 
/** 
 * An example from Chapter 1. Creates the library XML file using JDOM. 
 */ 
public class LibraryJDOMCreator { 
 
    public Document createDocument(Library library) { 
        Element root = new Element("library"); 
        // JDOM supports the  
        DocType dt = new DocType("library", "library.dtd"); 
        Document doc = new Document(root, dt); 
 
        // add  children to the  element 
        Iterator publisherIter = library.getPublishers().iterator(); 
        while (publisherIter.hasNext()) { 
            Publisher pub = (Publisher) publisherIter.next(); 
            Element pubElem = createPublisherElement(pub); 
            root.addContent(pubElem); 
        } 
 
        // now add  children to the  element 
        Iterator bookIter = library.getBooks().iterator(); 
        while (bookIter.hasNext()) { 
            Book book = (Book) bookIter.next(); 
            Element bookElem = createBookElement(book); 
            root.addContent(bookElem); 
        } 
 
        return doc; 
    } 
 
    private Element createPublisherElement(Publisher pub) { 
        Element pubElem = new Element("publisher"); 
 
        pubElem.addAttribute("id", pub.getId()); 
        pubElem.addContent(new Element("name").setText(pub.getName())); 
        pubElem.addContent(new Element("street").setText(pub.getStreet())); 
        pubElem.addContent(new Element("city").setText(pub.getCity())); 
        pubElem.addContent(new Element("state").setText(pub.getState())); 
        pubElem.addContent(new Element("postal").setText(pub.getPostal())); 
 
        return pubElem; 
    } 
 
    private Element createBookElement(Book book) { 
        Element bookElem = new Element("book"); 
 
        // add publisher="oreilly" and isbn="1234567" attributes 
        // to the  element 
        bookElem.addAttribute("publisher", book.getPublisher().getId()) 
                .addAttribute("isbn", book.getISBN()); 
 
        // now add an  element to  
        bookElem.addContent(new Element("edition").setText( 
                Integer.toString(book.getEdition()))); 
 
        Element pubDate = new Element("publicationDate"); 
        pubDate.addAttribute("mm", 
                Integer.toString(book.getPublicationMonth())); 
        pubDate.addAttribute("yy", 
                Integer.toString(book.getPublicationYear())); 
        bookElem.addContent(pubDate); 
 
        bookElem.addContent(new Element("title").setText(book.getTitle())); 
        bookElem.addContent(new Element("author").setText(book.getAuthor())); 
 
        return bookElem; 
    } 
 
    public static void main(String[] args) throws IOException { 
        Library lib = new Library(); 
        LibraryJDOMCreator ljc = new LibraryJDOMCreator(); 
        Document doc = ljc.createDocument(lib); 
 
        // Write the XML to System.out, indent two spaces, include 
        // newlines after each element 
        new XMLOutputter("  ", true, "UTF-8").output(doc, System.out); 
    } 
}