Mega Code Archive
Extends DefaultHandler to create a XML binding
<![CDATA[
import java.io.File;
import java.util.ArrayList;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.helpers.DefaultHandler;
public class SAXSample {
public static void main(String[] args) throws Exception {
File file = new File("book.xml");
SAXParserFactory factory = SAXParserFactory.newInstance();
MyHandler handler = new MyHandler();
SAXParser saxParser = factory.newSAXParser();
saxParser.parse(file, handler);
SAXBooks books = handler.getBooks();
for (int i = 0; i < books.getBookSize(); i++) {
SAXBook book = books.getBook(i);
System.out.println(book);
}
}
}
class MyHandler extends DefaultHandler {
private SAXBooks books;
private boolean readingAuthor;
private boolean readingTitle;
private boolean readingPrice;
public SAXBooks getBooks() {
return this.books;
}
public void startElement(String uri, String localName, String qName, Attributes attributes) {
if (qName.equalsIgnoreCase("books")) {
books = new SAXBooks();
} else if (qName.equalsIgnoreCase("book")) {
SAXBook book = new SAXBook();
for (int i = 0; i < attributes.getLength(); i++) {
if (attributes.getQName(i).equalsIgnoreCase("category")) {
book.setCategory(attributes.getValue(i));
}
}
books.addBook(book);
} else if (qName.equalsIgnoreCase("author")) {
this.readingAuthor = true;
} else if (qName.equalsIgnoreCase("title")) {
this.readingTitle = true;
} else if (qName.equalsIgnoreCase("price")) {
this.readingPrice = true;
} else {
System.out.println("Unknown element: " + qName);
}
}
public void startDocument() {
}
public void endDocument() {
}
public void characters(char[] ch, int start, int length) {
String chars = new String(ch, start, length).trim();
if (chars.length() == 0) {
return;
}
SAXBook book = books.getLastBook();
if (readingAuthor) {
book.setAuthor(chars);
} else if (readingTitle) {
book.setTitle(chars);
} else if (readingPrice) {
book.setPrice(Float.parseFloat(chars));
}
}
public void endElement(String uri, String localName, String qName) {
if (qName.equalsIgnoreCase("author")) {
this.readingAuthor = false;
} else if (qName.equalsIgnoreCase("title")) {
this.readingTitle = false;
} else if (qName.equalsIgnoreCase("price")) {
this.readingPrice = false;
}
}
}
class SAXBook {
private String title;
private String author;
private String category;
private float price;
public SAXBook() {
}
public SAXBook(String title, String author, String category, float price) {
this.title = title;
this.author = author;
this.category = category;
this.price = price;
}
public String getTitle() {
return this.title;
}
public void setTitle(String title) {
this.title = title;
}
public String getAuthor() {
return this.author;
}
public void setAuthor(String author) {
this.author = author;
}
public String getCategory() {
return this.category;
}
public void setCategory(String category) {
this.category = category;
}
public float getPrice() {
return this.price;
}
public void setPrice(float price) {
this.price = price;
}
public String toString() {
return "Book: " + title + ", " + category + ", " + author + ", " + price;
}
}
class SAXBooks {
private ArrayList<SAXBook> bookList = new ArrayList<SAXBook>();
public SAXBooks() {
}
public void addBook(SAXBook book) {
this.bookList.add(book);
}
public SAXBook getBook(int index) {
if (index >= bookList.size()) {
return null;
}
return (SAXBook) bookList.get(index);
}
public SAXBook getLastBook() {
return this.getBook(this.getBookSize() - 1);
}
public int getBookSize() {
return bookList.size();
}
}
<books>
<book category="fiction">
<title>title 1</title>
<author>Tim Lahaye</author>
<price>14.95</price>
</book>
<book category="science fiction">
<title>title 2</title>
<author>Tim Lahaye</author>
<price>14.95</price>
</book>
</books>
]]>