/**
* title: Books
*@date: Sep 16, 2004
* @author: MinHuaHuang
* @ID: 66283
*/
package huan66283.Sep16;
import java.io.*;
import java.net.*;
import java.util.*;
import javax.xml.parsers.*;
import org.xml.sax.*;
import org.xml.sax.helpers.*;
public class Books extends DefaultHandler {
StringBuffer htmlOut;
private HashMap items = new HashMap();
private float Total = 0;
public String toString() {
if (htmlOut != null)
return htmlOut.toString();
return super.toString();
}
public void startElement(String namespace,
String localName,
String qName,
Attributes atts) {
if (localName.equals("book"))
{
String id = atts.getValue("id");
String title = atts.getValue("title");
String author = atts.getValue("author");
String isbn = atts.getValue("ISBN");
String html = atts.getValue("htmlURL");
String text = atts.getValue("textURL");
String book = new String("Book:
Title:'" + title + "'
Author:" + author);
items.put(id, book);
}
if (localName.equals("item"))
{
String id = atts.getValue("id");
float price = Float.parseFloat(atts.getValue("prize"));
int quantity = Integer.parseInt(atts.getValue("quantity"));
float itemTotal = price * quantity;
Total += itemTotal;
htmlOut.append("\n| \n");
htmlOut.append((String)items.get(id));
htmlOut.append("\n | \n$");
htmlOut.append(price);
htmlOut.append("\n | \n");
htmlOut.append(quantity);
htmlOut.append("\n | \n$");
htmlOut.append(itemTotal);
htmlOut.append("\n |
\n");
}
}
public void processWithSAX(String urlString) throws Exception {
System.out.println("Processing URL " + urlString);
htmlOut = new StringBuffer("My Shopping Cart\n\n");
htmlOut.append("The books for fall 2004 semester
\n");
htmlOut.append("\n");
htmlOut.append("| Description: | \n");
htmlOut.append("Unit Price | \n");
htmlOut.append("Quantity | \n");
htmlOut.append("$ Item Total |
\n");
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.newSAXParser();
ParserAdapter pa = new ParserAdapter(sp.getParser());
pa.setContentHandler(this);
pa.parse(urlString);
htmlOut.append("\n| Total: | \n");
htmlOut.append("\n");
htmlOut.append(Total);
htmlOut.append("\n |
\n");
htmlOut.append("
\n");
htmlOut.append("
by Min Hua Huang
\n");
htmlOut.append("(This program uses SAX generate html from xml)
\n");
htmlOut.append("\n");
}
public static void main(String[] args) {
try {
Books book = new Books();
book.processWithSAX("My_Data/"+ args[0]);
String output = book.toString();
System.out.println("Saving result to " + args[1]);
FileWriter fw = new FileWriter(new File("My_Data/",args[1]));
fw.write(output, 0, output.length());
fw.flush();
}
catch (Throwable t) {
t.printStackTrace();
}
}
}