login.java

上传的聊天系统程序与QQ程序差不多,只是功能没有QQ那么强大

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

public class login extends JFrame implements ActionListener
{
   JFrame frame = new JFrame();
   JPanel contentPane;
   JPanel loginpanel;        
        
   TextField name_txt; //用户名
   JPasswordField password_txt;   //密码
   JButton log_in ,cancel,apply;
   JLabel label1,label2;
   Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); //获得屏幕尺寸   
   
   Socket soc=null;                   //定义连接套接字
   DataInputStream dis=null;          //定义用来实现客户端接受服务器数据的输入流
   DataOutputStream dos=null;          //定义用来实现从客户端发送数据到服务器的输出流
   chatfram login1=null;
   applynum applyframe=null;
   
   public login()
   {
   	  contentPane = (JPanel) frame.getContentPane();
      contentPane.setLayout(null);
      contentPane.setBackground(new Color(240,248,255));

      loginpanel = new JPanel();        
      loginpanel.setLayout(null);  
      loginpanel.setBounds(16,16,300,200);
      loginpanel.setBackground(new Color(240,248,255));
   	  
   	  frame.setTitle("PP用户登录");
   	  frame.setResizable(false);
	  
	  label1 = new JLabel();
	  label1.setText("PP号码");
	  label1.setBounds(30,40,60,25);
	  loginpanel.add(label1);
   	  
   	  label2 = new JLabel();
   	  label2.setText("PP密码");
   	  label2.setBounds(30,90,60,25);
   	  loginpanel.add(label2);
   	  
   	  log_in = new JButton();            //登录按钮
   	  log_in.setLabel("登录");
   	  log_in.setToolTipText("点击后连接服务器验证信息"); 
   	  log_in.setBounds(80,130,65,25);  	  
   	  log_in.setBackground(new Color(169,215,255));
   	  log_in.setBorder(new BevelBorder(BevelBorder.RAISED));
   	  log_in.addActionListener(this);
   	  loginpanel.add(log_in);
   	  
   	  cancel = new JButton();              //取消按钮
   	  cancel.setLabel("取消");
   	  cancel.setToolTipText("点击退出程序");
   	  cancel.setBounds(150,130,65,25);
   	  cancel.setBackground(new Color(169,215,255));
   	  cancel.setBorder(new BevelBorder(BevelBorder.RAISED));
   	  cancel.addActionListener(this);
   	  loginpanel.add(cancel);
   	  
   	  apply = new JButton();              //注册按钮
   	  apply.setLabel("申请号码");
   	  apply.setToolTipText("点击进入号码申请界面");
   	  apply.setBounds(218,38,65,25);
   	  apply.setBackground(new Color(169,215,255));
   	  apply.setBorder(new BevelBorder(BevelBorder.RAISED));
   	  apply.addActionListener(this);
   	  loginpanel.add(apply);
   	  
   	  name_txt = new TextField();       //帐号输入区域
   	  name_txt.setText(null);
   	  name_txt.setBounds(80,40,120,20);
   	  loginpanel.add(name_txt);
   	  
   	  password_txt = new JPasswordField();   //密码输入区域
   	  password_txt.setText(null);
	  password_txt.setBounds(80,90,120,20);
	  password_txt.setBorder(new BevelBorder(BevelBorder.LOWERED));
	  loginpanel.add(password_txt);
	  
	  contentPane.add(loginpanel);
   	  frame.setSize(330,250);
   	  frame.addWindowListener(new WindowAdapter()
      {  
         public void windowClosing(WindowEvent e)
         {  
            disconnect();
            System.exit(0);
         }
      });
   	  frame.setLocation(screenSize.width/2-175,screenSize.height/2-125);  //使得窗口居中显示
   	  frame.setVisible( true );
   	
   }
   
   public void actionPerformed(ActionEvent e)
    {
		  if(e.getSource()==log_in)            
		  {
	          
	        try{
   	  	       soc=new Socket("localhost",1234);    //使用端口1234实例化一个本地套接字
		       System.out.println(soc);                             //在控制台打印实例化的结果
			   dis=new DataInputStream(soc.getInputStream());           //将dis指向soc的输入流
              dos=new DataOutputStream(soc.getOutputStream());           //将dos指向soc的输出流
   	           }
   	          catch(Exception event){}
	          if(name_txt.getText().equals("")==false&&password_txt.getText().equals("")==false)
	          {
	           	 try
	           	 {
					 dos.writeUTF("Confim:"+name_txt.getText()+":"+password_txt.getText()+":"+InetAddress.getLocalHost().toString());
		           	 String confim=dis.readUTF();
		           	 System.out.println(confim);
		           	 String[] shortString=confim.split(":");
		           	 String cnum=shortString[0];
		           	 String cps=shortString[1];
		           	 if(shortString[0].equals("true")&&shortString[1].equals("true"))
		           	 {
			           	 login1=new chatfram(name_txt.getText(),dis,dos);
			             frame.setVisible(false); 
			         }
			         else if(shortString[0].equals("false")&&shortString[1].equals("false"))
		           	 {
			           	 dos.writeUTF("QUIT");
			           	 JFrame ff=new JFrame();
		           	     JOptionPane.showMessageDialog(ff,"此PP帐号不存在！","警告",JOptionPane.WARNING_MESSAGE);  
			         }
			         else if(shortString[0].equals("true")&&shortString[1].equals("false"))
		           	 {
			           	 dos.writeUTF("QUIT");
			           	 JFrame ff=new JFrame();
		           	     JOptionPane.showMessageDialog(ff,"您输入的密码错误,请重新输入！","警告",JOptionPane.WARNING_MESSAGE);
			         }
			     }
			     catch (Exception event){}
	          } 
	          else if(name_txt.getText().equals("")==true||password_txt.getText().equals("")==true)
	          {
	           	  JFrame ff=new JFrame();
	           	  JOptionPane.showMessageDialog(ff,"帐号或者密码不能为空,请正确填写！","警告",JOptionPane.WARNING_MESSAGE);
	          }
	          else
	          {
	           	  JFrame ff=new JFrame();
	           	  JOptionPane.showMessageDialog(ff,"帐号或者密码错误,请重新输入！","警告",JOptionPane.WARNING_MESSAGE);
	          }
		  }//end of if
		  else if(e.getSource()==cancel) 
		  {
		      System.exit(0); 	 
		  } 
		  else if(e.getSource()==apply) 
		  {
		  	  frame.setVisible(false);  
		      applyframe=new applynum(frame);  
		  }
      }
   
   public void disconnect()                                         //客户端点击断开连接要运行的方法
   {
      if(soc!=null)
	  {
	     try
		 {
			dos.writeUTF("QUIT");                                    //用输出流发送QUIT信息通知服务器断开此次通信
			soc.close();                                           //关闭套接字
		    soc=null;
         }
		 catch(IOException e)
		 {
		     System.out.println("Error:"+e);
		 }
	  }// end of if
   }
   
   public static void main(String[] args) 
   {
     login cc=new login();
     
   }		
 }