给多少是多呢?(关于JAXP的访问XML节点的初级问题)

关于jaxp的sax,dom,程序员2001有一期(记得是蓝面子)讲的比较好,建议看一下.
JB6是集成了JAXP.没有向导.

解决方案 »

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<HTML>
<HEAD>
<TITLE>JSPㄏノXMLㄒ肈</TITLE>
</HEAD>
<BODY>
<%@ page errorPage="ErrPage.jsp"
         contentType="text/html;charset=Big5" %>
<%@ page import="java.io.*" %>
<%@ page import="java.util.Hashtable" %>
<%@ page import="org.w3c.dom.*" %>
<%@ page import="org.xml.sax.*" %>
<%@ page import="javax.xml.parsers.SAXParserFactory" %>
<%@ page import="javax.xml.parsers.SAXParser" %>
<%@ page import="SAXHandler" %>
<%
File file = new File("../howjsp/item.xml");
FileReader reader = new FileReader(file);
Parser parser;
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.newSAXParser();
SAXHandler handler = new SAXHandler();
sp.parse(new InputSource(reader), handler);
Hashtable cfgTable = handler.getTable();
out.println("<TABLE><CAPTION>XML ITEM ン</CAPTION>");
out.println("<TR><TD>ID</TD>" +
  "<TD>" +
  (String)cfgTable.get(new String("ID")) + "</TD></TR>");
out.println("<TR><TD>DESCRIPTION</TD>" +
  "<TD>" +
  (String)cfgTable.get(new String("DESCRIPTION"))+"</TD></TR>");
out.println("<TR><TD>PRICE</TD>" +
  "<TD>" +
  (String)cfgTable.get(new String("PRICE")) + "</TD></TR>");
out.println("<TR><TD>QUANTITY</TD>" +
  "<TD>" +
  (String)cfgTable.get(new String("QUANTITY")) + "</TD></TR>");
out.println("</TABLE>");
%>
</BODY>
</HTML>_______________________________________
//==================== SAXHandler.java ======================
import java.io.*;
import java.util.Hashtable;
import org.xml.sax.*;
public class SAXHandler extends HandlerBase
  {
  private Hashtable table = new Hashtable();
  private String currentElement = null;
  private String currentValue = null;
  public void setTable(Hashtable table)
    {
    this.table = table;
    }
  public Hashtable getTable()
    {
    return table;
    }
  public void startElement(String tag, AttributeList attrs)
  throws SAXException
    {
    currentElement = tag;
    }
  public void characters(char[] ch, int start, int length)
  throws SAXException
    {
    currentValue = new String(ch, start, length);
    }
  public void endElement(String name) throws SAXException
    {
    if (currentElement.equals(name))
      table.put(currentElement, currentValue);
    }
  }_________________________
//=================== XmlTest.java ===========================
import java.io.*;
import java.util.Hashtable;
import java.util.Enumeration;
import org.w3c.dom.*;
import org.xml.sax.*;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.SAXParser;
public class XmlTest
  {
  public static void main (String argv []) throws IOException
    {
    if (argv.length!=1)
      {
      System.err.println ("USAGE: java XmlTest filename");
      System.exit(1);
      }
    try
      {
      //String xmlResource = "file:" + new File(argv[0]).getAbsolutePath();
      String filename = argv[0];
      File file = new File(filename);
      FileReader reader = new FileReader(file);
      Parser parser;
      SAXParserFactory spf = SAXParserFactory.newInstance();
      SAXParser sp = spf.newSAXParser();
      SAXHandler handler = new SAXHandler();
      sp.parse(new InputSource(reader), handler);
      Hashtable cfgTable = handler.getTable();
      System.out.println("ID == " +
        (String)cfgTable.get(new String("ID")));
      System.out.println("DESCRIPTION == " +
        (String)cfgTable.get(new String("DESCRIPTION")));
      System.out.println("PRICE == " +
        (String)cfgTable.get(new String("PRICE")));
      System.out.println("QUANTITY == " +
        (String)cfgTable.get(new String("QUANTITY")));
      }
    catch (Exception e)
      {
      e.printStackTrace();
      }
    System.exit(0);
    }
  }
莫怪我这人挑剔,我想用DOM实现.牢您架!小弟后学末进,望各位兄弟姐妹给予帮助!