usebrowser.java

也就是说

import com.ms.xml.ParseException;
import com.ms.xml.Document;
import com.ms.xml.Element;

import java.util.Enumeration;
import java.awt.*;
import java.net.*;
import java.applet.Applet;

public class useBrowser extends Applet
{
    	Button button1;
    	static String filename;    
    	static String displayStrings[] = new String[100];
    	static int numberDisplayLines = 0;

    	public static void main(String args[])
    	{
        	browserFrame frame = new browserFrame("XML Browser");
        	frame.show();
        	frame.hide();
        	frame.resize(320, 300);
        	browser applet = new browser();
        	frame.add("Center", applet);
        	applet.init();
        	applet.start();
        	frame.show();
    	}

    	public void init()
    	{
        	button1 = new Button("Browse");
        	add(button1);
    	}

    	public boolean action (Event e, Object o)
    	{
        	URL url = null;
        	try 
        	{
            		url = new URL("file:////c://xml//useBrowser//useBrowser.xml");
        	} 
        	catch (MalformedURLException e1) 
        	{
            		System.out.println("Cannot create URL for: " + filename);
            		System.exit(0);
        	}
        	Document d = new Document(); 
        	try 
        	{
            	d.load(url);
        	}
        	catch (ParseException e3) 
        	{
            		d.reportError(e3, System.out);
        	}
        	if (d != null) 
        	{
        		//递归调用，分析XML文档内容
            		doTree(d.getRoot(), "");
            		repaint();
        	}
        	return true;
    	}

    	void doTree(Element elem, String indent)
    	{
        	if(elem.numElements() > 1)
        	{
            		Enumeration enum = elem.getChildren();
            		while (enum.hasMoreElements()) 
            		{
                		Element elem2 = (Element)enum.nextElement();
                		doTree(elem2, indent + "   ");
            		}
        	}
        	else
        	{
             		displayStrings[numberDisplayLines++] = indent + elem.getText();
        	}
    	}
	//绘制图形
    	public void paint(Graphics g)
    	{
        	int y = 0;
        	FontMetrics fontmetrics = getFontMetrics(getFont());
        	for(int index = 0; index < numberDisplayLines; index++)
        	{
            		y += fontmetrics.getHeight();
            		g.drawString(displayStrings[index], 0, y);
        	}
    	}
}    

class browserFrame extends Frame
{
    	public browserFrame(String str)
    	{
        	super (str);
    	}

    	public boolean handleEvent(Event evt)
	{		
		if(evt.id==Event.WINDOW_DESTROY)
		{
			dispose();
			System.exit(0);
			return true;
		}
		else
			return super.handleEvent(evt);		
	}

}