stockquoteservice.jws

《java网络编程精解》的源代码

/*
 * The Apache Software License, Version 1.1
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 * Copyright (c) 2001 The Apache Software Foundation.  All rights 
 * reserved.
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 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
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 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
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 */

import org.apache.axis.utils.XMLUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

/**
 * See \samples\stock\readme for info.
 *
 * @author Sanjiva Weerawarana ([e-mail])
 * @author Doug Davis ([e-mail])
 */
public class StockQuoteService {
  public float getQuote (String symbol) throws Exception {
    // get a real (delayed by 20min) stockquote from 
    // http://www.xmltoday.com/examples/stockquote/. The IP addr 
    // below came from the host that the above form posts to ..

    if ( symbol.equals("XXX") ) return( (float) 66.25 );


    Document doc = null ;
    
    doc = XMLUtils.newDocument( "http://www.xmltoday.com/examples/" +
                                "stockquote/getxmlquote.vep?s="+symbol );

    Element  elem = doc.getDocumentElement();
    NodeList list = elem.getElementsByTagName("stock_quote");

    elem = (Element) list.item(0);
    list = elem.getElementsByTagName( "price" );
    elem = (Element) list.item( 0 );
    String quoteStr = elem.getAttribute("value");
    try {
      return Float.valueOf(quoteStr).floatValue();
    } catch (NumberFormatException e1) {
      // maybe its an int?
      try {
        return Integer.valueOf(quoteStr).intValue() * 1.0F;
      } catch (NumberFormatException e2) {
        return -1.0F;
      }
    }
  }
}