chat.java

使用swt（java图形界面编程）实现的一个简单的局域网聊天程序

import java.io.BufferedInputStream;
import java.io.InputStream;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.ShellAdapter;
import org.eclipse.swt.events.ShellEvent;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.ColorDialog;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.FontDialog;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;


public class Chat
{

	/**
	 * Launch the application
	 * @param args
	 */
	public String yourip;
	public static void main(String[] args) {
		final Display display = Display.getDefault();
		final Shell chatApplicationShell = new Shell(SWT.MIN);
		chatApplicationShell.addShellListener(new ShellAdapter() {
			public void shellClosed(final ShellEvent e) {System.exit(0);}
		});
		chatApplicationShell.setFont(new Font(display,"微软雅黑", 10, SWT.NONE));
		chatApplicationShell.setSize(500, 430);
		chatApplicationShell.setText("Chat Application");
		//

		chatApplicationShell.open();
		final Label Label = new Label(chatApplicationShell, SWT.NONE);
		final Text text_in = new Text(chatApplicationShell, SWT.WRAP | SWT.V_SCROLL | SWT.MULTI | SWT.BORDER);
		final Text text_out = new Text(chatApplicationShell, SWT.WRAP | SWT.V_SCROLL | SWT.MULTI | SWT.BORDER);
		
		Label.setFont(new Font(display,"微软雅黑", 9, SWT.NONE));
		Label.setText("输入对方IP：");
		Label.setBounds(33, 10, 71, 17);
		final Text text_yourip = new Text(chatApplicationShell, SWT.BORDER);
		text_yourip.setBounds(110, 9, 143, 18);
		final Label label = new Label(chatApplicationShell, SWT.NONE);
		label.setFont(new Font(display,"微软雅黑", 9, SWT.NONE));
		label.setText("本机IP：");
		label.setBounds(259, 10, 46, 17);
		final Text text_myip = new Text(chatApplicationShell, SWT.BORDER);
		text_myip.setBackground(new Color(display,255, 255, 255));
		text_myip.setEditable(false);
		text_myip.setBounds(311, 9, 143, 18);
		InetAddress myip=null;
		try{myip=InetAddress.getLocalHost();}
		catch(Exception e) {}
		text_myip.setText(myip.toString());
		

		
		text_in.setFont(new Font(display,"微软雅黑", 10, SWT.NONE));
		text_in.setBackground(new Color(display,255, 255, 255));
		text_in.setEditable(false);
		text_in.setBounds(10, 46, 472, 138);

		final Composite composite = new Composite(chatApplicationShell, SWT.NONE);
		composite.setBounds(10, 183, 472, 20);

		final Button Button_textoutColor = new Button(composite, SWT.NONE);
		Button_textoutColor.addMouseListener(new MouseAdapter() {
			public void mouseDown(final MouseEvent e) {
				ColorDialog cd = new ColorDialog(chatApplicationShell,SWT.NONE);
				cd.setText("Sample Color Dialog");
				RGB rgb = cd.open();
				if(rgb!=null)
				{
					text_out.setBackground(new Color(display, rgb.red,rgb.green,rgb.blue));
				}
			}
		});
		Button_textoutColor.setText("C2");
		Button_textoutColor.setBounds(100, 0, 24, 20);

		final Button Button_fontColor = new Button(composite, SWT.NONE);
		Button_fontColor.addMouseListener(new MouseAdapter() {
			public void mouseDown(final MouseEvent e) {
				FontDialog fd = new FontDialog(chatApplicationShell, SWT.NONE);
				fd.setText("Sample Font Dialog");
				FontData d = fd.open();
				if(d!=null)
				{
					text_out.setFont(new Font(display,d));
					text_in.setFont(new Font(display,d));
				}
			}
		});
		
		Button_fontColor.setText("A");
		Button_fontColor.setBounds(40, 0, 24, 20);

		final Button Button_textinColor = new Button(composite, SWT.NONE);
		Button_textinColor.addMouseListener(new MouseAdapter() {
			public void mouseDown(final MouseEvent e) {
				ColorDialog cd = new ColorDialog(chatApplicationShell,SWT.NONE);
				cd.setText("Sample Color Dialog");
				RGB rgb = cd.open();
				if(rgb!=null)
				{
					text_in.setBackground(new Color(display, rgb.red,rgb.green,rgb.blue));
				}
			}
		});
		Button_textinColor.setText("C1");
		Button_textinColor.setBounds(70, 0, 24, 20);

		final Button pingButton = new Button(composite, SWT.FLAT);
		pingButton.addMouseListener(new MouseAdapter() {
			public void mouseDown(final MouseEvent e) {
				String regex="\\d{1,}\56\\d{1,}\56\\d{1,}\56\\d{1,}";
				String yourip=text_yourip.getText().toString();
				if(yourip.matches(regex))
				{
					try
					{
						Runtime ce=Runtime.getRuntime();
						InputStream in=(InputStream) ce.exec("ping "+text_yourip.getText().toString()).getInputStream();
						BufferedInputStream bin=new BufferedInputStream(in);
						byte pingInfo[]=new byte[100];
						int n;
						while((n=bin.read(pingInfo,0,100))!=-1)
						{
							String s=null;
							s=new String(pingInfo,0,n);
							text_in.append(s);
						}
						text_in.append("Over!\n\n");
					}
					catch(Exception ee)
					{
						System.out.println(ee);
					}
				}
				else
				{
					text_in.append("提示：你输入的对方ip不正确，请重新输入\n");
				}
			}
		});
		pingButton.setText("ping");
		pingButton.setBounds(183, 0, 44, 20);

		final Button backgroundButton = new Button(composite, SWT.NONE);
		backgroundButton.addMouseListener(new MouseAdapter() {
			public void mouseDown(final MouseEvent e) {
				ColorDialog cd = new ColorDialog(chatApplicationShell,SWT.NONE);
				cd.setText("Sample Color Dialog");
				RGB rgb = cd.open();
				if(rgb!=null)
				{
					chatApplicationShell.setBackground(new Color(display, rgb.red,rgb.green,rgb.blue));
				}
			}
		});
		backgroundButton.setText("B");
		backgroundButton.setBounds(130, 0, 24, 20);

		
		text_out.setFont(new Font(display,"微软雅黑", 10, SWT.NONE));
		text_out.setBounds(10, 203, 472, 154);

		final Button button_close = new Button(chatApplicationShell, SWT.NONE);
		button_close.addMouseListener(new MouseAdapter() {
			public void mouseUp(final MouseEvent e) {
				System.exit(0);
			}
		});
		button_close.setText("关闭");
		button_close.setBounds(339, 363, 44, 23);

		final Button button_send = new Button(chatApplicationShell, SWT.NONE);
		button_send.addMouseListener(new MouseAdapter() {
			public void mouseDown(final MouseEvent e) {
				String regex="\\d{1,}\56\\d{1,}\56\\d{1,}\56\\d{1,}";
				String yourip=text_yourip.getText().toString();
				if(yourip.matches(regex))
				{
					byte buffer[]=text_out.getText().trim().getBytes();
					try
					{
						InetAddress address=InetAddress.getByName(text_yourip.getText().toString());
						DatagramPacket data_pack=new DatagramPacket(buffer,buffer.length,address,2009);
						DatagramSocket mail_data=new DatagramSocket();
						mail_data.send(data_pack);
						text_in.append("我："+text_out.getText()+"\n");
						text_out.setText("");
					}
					catch(Exception ee) {}
					}
				else
				{
					text_in.append("提示：你输入的对方ip不正确，请重新输入\n");
				}
			}
		});
		button_send.setText("发送");
		button_send.setBounds(406, 363, 44, 23);
		chatApplicationShell.layout();
		
		new Thread()//接收数据包线程
		{
				public void run()
				{
					DatagramPacket pack=null;
					DatagramSocket mail_data=null;
					byte data[]=new byte[8192];
					try
					{
						pack=new DatagramPacket(data,data.length);
						mail_data=new DatagramSocket(2008);
						
					}
					catch(Exception e) {System.out.println(""+e.toString());}
					while(true)
					{	
						if(mail_data==null) {break;}
						else
						{
							try
							{
								mail_data.receive(pack);
								int length=pack.getLength();
								final String message=new String(pack.getData(),0,length);
								display.asyncExec(new Runnable() {
									public void run() {
									text_in.append("对方："+message+"\n");
									}
									});
							}
							catch(Exception ee) {System.out.println(""+ee.toString());}
						}
					}
				}
		}.start();
		
		while (!chatApplicationShell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
	}
}