loginfrm.java

简单的聊天程序

import javax.swing.*;
import java.io.*;
import java.net.*;
import java.awt.event.*;
import java.awt.*;

public class LoginFrm {
	private JFrame f;
	private JButton set,login,request,setCfm;
	private JTextField numF;
	private JPasswordField pasF;
	private ConfrgDlg dlg;
	private String ip,port;
	private LoginAdapter loginApt;

	public LoginFrm(){
		buildGUI();
		hookEvent();
		init();
	}
	private void buildGUI(){
		f = new JFrame("QQ用户登陆");
		f.setSize(330,330);
		f.setResizable(false);
		f.setIconImage(
				new ImageIcon("Icon/titleIcon.gif").getImage());
		Container c = f.getContentPane();		
		c.setBackground(Color.CYAN);
		/**
		 * South panel
		 */
		JPanel pNth = new JPanel();
		pNth.setLayout(new GridLayout(3,1,0,0));
		JPanel numP = new JPanel();
		JPanel pasP = new JPanel();
		JPanel bar = new JPanel();
		GridBagLayout gb = new GridBagLayout();
		numP.setLayout(gb);
		pasP.setLayout(gb);
		GridBagConstraints gbc = new GridBagConstraints();
		JLabel numLab = new JLabel("QQ号码",SwingConstants.CENTER);
		JLabel pasLab = new JLabel("QQ密码",SwingConstants.CENTER);
		numF = new JTextField(20);
		pasF = new JPasswordField(20);
		MyUtilities.addGCmp(numP,numLab,gb,gbc,0,0,1,1,1,1);
		MyUtilities.addGCmp(numP,numF,gb,gbc,1,0,1,1,1,1);
		MyUtilities.addGCmp(pasP,pasLab,gb,gbc,0,0,1,1,1,1);
		MyUtilities.addGCmp(pasP,pasF,gb,gbc,1,0,1,1,1,1);
		pNth.add(numP);
		pNth.add(bar);
		pNth.add(pasP);
		c.add(pNth,BorderLayout.NORTH);
		/**
		 * Center panel
		 */
		ImageIcon bgImg = new ImageIcon("Icon/load.gif");
		JLabel bgLab = new JLabel(bgImg);
		c.add(bgLab,BorderLayout.CENTER);
		/**
		 * south panel
		 */
		JPanel pSouth = new JPanel();
		pSouth.setLayout(new FlowLayout(FlowLayout.CENTER,5,0));
		this.set = new JButton("设置");
		this.login = new JButton("登录");
		this.request = new JButton("申请号码");
		/**
		 * 设置对话框里面的按钮
		 */
		this.setCfm = new JButton("确定");
		pSouth.add(set);
		pSouth.add(request);
		pSouth.add(login);
		c.add(pSouth,BorderLayout.SOUTH);
		Dimension size = Toolkit.getDefaultToolkit().getScreenSize();
		/*居中*/
		f.setLocation( (size.width-f.getWidth())/2,
				(size.height-f.getHeight())/2);
		f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
		f.setVisible(true);
	}
	private void hookEvent(){
		this.login.addActionListener(new Adapter());
		this.set.addActionListener(new Adapter());
		this.request.addActionListener(new Adapter());
		this.setCfm.addActionListener(new Adapter());
		this.f.addComponentListener(new ComponentAdapter(){
			public void componentMoved(ComponentEvent e){
				if(dlg !=null){
					resetDlgLocation();
				}
			}
		});

	}
	private void init(){
		this.ip = "172.17.74.118";
		this.port= "9999";
	}
	private void login(){
		/**
		 * check null
		 */
		String number = this.numF.getText();
		String password = String.valueOf(this.pasF.getPassword());
		if(number.equals("")||
				password.equals("")){
			JOptionPane.showMessageDialog(null,"输入栏不能为空！",
					"输入有误",JOptionPane.ERROR_MESSAGE);
			return;
		}else{
			try{
				this.loginApt = new LoginAdapter();
			}catch (Exception e) {
				JOptionPane.showMessageDialog(
						null,"对不起，聊天服务器暂时没有开启","连接错误",
						JOptionPane.ERROR_MESSAGE);
				return;
			} 
			try{
				/**
				 * 验证客户的登录权限
				 */
				String feedBack = this.loginApt.checkInfo(number, password);
				/*登录失败 */
				if(feedBack.equals("Invalid")){
					JOptionPane.showMessageDialog(
							null,"用户名密码有误或者重复登录","登录失败",
							JOptionPane.ERROR_MESSAGE);
				}else if(feedBack.equals("valid")){
					/**
					 * 注销登录框,显示在线列表
					 */
					this.f.dispose();
					new OnLineFrm(this.loginApt.input,number,ip,port);
				}
			}catch(Exception e)
			{}

		} 
	}

	private void request() throws Exception{

		new RequestFrm(this.ip,this.port);
	}
	private void setConfirm(){
		//保存dlg中的有用信息
		this.ip = dlg.ipF.getText();
		this.port = dlg.portF.getText();
		dlg.dispose();
	}
	// 处理设置框的显示
	private void showDlg(){
		dlg = new ConfrgDlg();
		resetDlgLocation();
	}
	//归位
	private void resetDlgLocation(){
		int x = f.getLocation().x;
		int y = f.getLocation().y + f.getHeight();
		dlg.setLocation(x, y);
	}
	class LoginAdapter{
		private Socket connection;
		private ObjectInputStream input;
		private ObjectOutputStream output;
		public LoginAdapter()throws Exception{
			this.connectS();
			output = new ObjectOutputStream(
					this.connection.getOutputStream());
			input = new ObjectInputStream(
					this.connection.getInputStream());
		}
		/**
		 * 从服务器读出验证消息
		 */
		public String checkInfo(String num,String pas) throws Exception{

			String msg = null;
			String loginMsg = this.connection.getLocalAddress().getHostAddress()+
			" "+num+" "+pas;
			output.writeObject(new Message("登录",loginMsg));
			try{
				msg = ((Message)this.input.readObject()).sysMsg;
			}catch(Exception e)
			{}
			return msg;
		}
		/**
		 * 传给OnlineFrm
		 */
		public Socket getConnection(){return this.connection;}

		private void connectS()throws IOException
		{
			this.connection = new Socket(
					ip,Integer.parseInt(port));
		}
	}
	class Adapter implements ActionListener{
		public void actionPerformed(ActionEvent e){
			if(e.getActionCommand().equals("设置")){
				showDlg();
			}
			else if(e.getActionCommand().equals("登录")){
				login();
			}
			else if(e.getActionCommand().equals("确定")){
				setConfirm();
			}
			else if(e.getActionCommand().equals("申请号码")){
				try{
					request();
				}catch(Exception c){
					JOptionPane.showMessageDialog(null,"申请号码失败");
				}
			}

		}
	}
	class ConfrgDlg extends JDialog{
		private JTextField ipF,portF;
		public ConfrgDlg(){
			this.setResizable(false);
			this.setUndecorated(true);
			JLabel ipLab = new JLabel("请输入服务器IP: ");
			JLabel portLab = new JLabel("请输入服务器port: ");
			ipF = new JTextField(20);
			portF = new JTextField(20);
			ipF.setText("172.17.74.118");
			portF.setText("9999");
			/**
			 * buttonPane
			 */
			JPanel buttonP = new JPanel();
			buttonP.setLayout(new FlowLayout(FlowLayout.CENTER));
			buttonP.add(setCfm);

			GridBagLayout gb = new GridBagLayout();
			GridBagConstraints gbc = new GridBagConstraints();
			this.setLayout(gb);
			MyUtilities.addGCmp(this,ipLab,gb,gbc,0,0,1,1,1,1);
			MyUtilities.addGCmp(this,ipF,gb,gbc,1,0,1,1,1,1);
			MyUtilities.addGCmp(this,new JPanel(),gb,gbc,0,1,2,1,1,1);
			MyUtilities.addGCmp(this,portLab,gb,gbc,0,2,1,1,1,1);
			MyUtilities.addGCmp(this,portF,gb,gbc,1,2,1,1,1,1);
			MyUtilities.addGCmp(this,buttonP,gb,gbc,0,3,2,1,1,1);
			this.pack();
			this.setVisible(true);
		}
	}
	public static void main(String[] args){
		LoginFrm f = new LoginFrm();
	}

}