taskparserbean.java

icsamples目录中有icsamples网络程序。 这个程序包括J2EE网络层的范例程序

/*
 * TaskParserBean.java
 *
 * Created on November 15, 2002, 12:11 PM
 */

package jwadbook.xml;

import java.io.*;
import java.util.*;
import org.xml.sax.*;
import org.xml.sax.helpers.DefaultHandler;
import javax.xml.parsers.SAXParserFactory;  
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;

public class TaskParserBean extends DefaultHandler implements java.io.Serializable {
   private Vector taskvect = new Vector();
   private TaskElement _task = null;
   private String character;
   private String fileName;
   public TaskParserBean() {
   }

   public void setFileName(String xmlname)
   {
       fileName = xmlname;
   }
   
   public Vector getTaskList()
   {
       try{
       parse(fileName);
       }
       catch (Exception  pec)
       {
           System.out.println(pec.toString());
       }
       return taskvect;
   }
   
   private Vector parse(String filename) throws Exception {
     SAXParserFactory spfact = 
      SAXParserFactory.newInstance(); 
     spfact.setValidating(false);
     SAXParser saxParser = spfact.newSAXParser(); 
     // create an XML reader
     XMLReader reader = saxParser.getXMLReader();
     FileReader file = new FileReader(filename);
     // set handler
     reader.setContentHandler(this);
     // call parse on an input source
     reader.parse(new InputSource(file));
     return taskvect;
   }
   
   public void startElement (String uri, String name,
    String qName, Attributes atts) {
      _task = new TaskElement(
      uri, name, qName, atts);
      taskvect.addElement(_task);
      character = new String();

   }

   // receive notification of the end of an element
   public void endElement (String uri, String name, String qName) {
     if(_task != null && character != null) {
        _task.setValue(character.trim());
     }
     _task = null;
   }
   
   // receive notification of character data
   public void characters (char ch[], int start, 
   int length) {
     if(_task != null && character != null) {
        String value = new String(
        ch, start, length);
        character += value;
     }
   }
}