developdocumentviewer.java

java图形化界面编程 功能和记事本通讯录相似 记录通讯人的姓名和联系方法等信息并提供查询

package elegate.cn.edu.nju;

import javax.swing.*;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;
import java.awt.*;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.*;
import java.net.*;
import java.util.Stack;

/**
 * a editor to display the html file
 * @author Elegate,[e-mail]
 * @author cs department of NJU
 */
public class DevelopDocumentViewer extends JFrame
{
	public static void main(String[] args)
	{
		JFrame f=new DevelopDocumentViewer("doc/index.html");
		f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	

	private static final long serialVersionUID = 1L;
	private JEditorPane editorPane;
	private Stack<URL> urlStack;
	private JButton btnBack;
	private JButton btnReload;
	private int HEIGHT=600;
	private int WIDTH=800;
	
	public DevelopDocumentViewer(final String path)
	{
		super("Develop Document");
		urlStack=new Stack<URL>();
		editorPane=new JEditorPane();
		editorPane.setEditable(false);
		editorPane.addHyperlinkListener(new MyHyperlinkListener());
		try
		{
			File file=new File(path);
			editorPane.setPage(file.toURL());
		}
		catch(Exception e)
		{
			editorPane.setText("Exception:"+e);
		}
		btnBack=new JButton("Back");
		btnBack.setMnemonic('B');
		btnBack.setToolTipText("Back to the last page");
		btnBack.addActionListener(new BtnBackL());
		btnReload=new JButton("Reload");
		btnReload.setMnemonic('R');
		btnReload.setToolTipText("Reload the URL");
		btnReload.addActionListener(new ActionListener(){

			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				try
				{
					File file=new File(path);
					urlStack.removeAllElements();
					//System.out.println("reload "+file.toURL());
					editorPane.setPage(file.toURL());
				}
				catch(Exception ex)
				{
					editorPane.setText("Exception:"+ex.toString());
				}
			}
			
		});
		JToolBar toolBar=new JToolBar();
		toolBar.add(btnBack);
		toolBar.add(btnReload);
		this.getContentPane().add(toolBar,BorderLayout.NORTH);
		this.getContentPane().add(new JScrollPane(editorPane),BorderLayout.CENTER);
		this.pack();
		Dimension d=Toolkit.getDefaultToolkit().getScreenSize();
		this.setSize(this.WIDTH,this.HEIGHT);
		this.setLocation((d.width-WIDTH)/2,(d.height-HEIGHT)/2);
		this.setVisible(true);
	}
	
	class BtnBackL implements ActionListener
	{

		public void actionPerformed(ActionEvent e) 
		{
			if(urlStack.size()<1)
				return;
			try
			{
				URL url=urlStack.pop();
				editorPane.setPage(url);
			}
			catch(Exception ex)
			{
				editorPane.setText("Exception:"+e);
			}
		}
		
	}
	class MyHyperlinkListener implements HyperlinkListener 
	{
		public void hyperlinkUpdate(HyperlinkEvent e)
		{
			if(e.getEventType()==HyperlinkEvent.EventType.ACTIVATED)
			{
				try
				{
					urlStack.push(editorPane.getPage());
					editorPane.setPage(e.getURL());
				}
				catch(IOException ex)
				{
					//editorPane=new JEditorPane();
					//editorPane.setEditable(false);
					//editorPane.addHyperlinkListener(new MyHyperlinkListener());
					editorPane.setText("Exception:"+e);
				}
			}
		}
	}
}