用java写的基于Socket的简单即时通讯程序
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/**//*
*服务端
*/
package edu.jlu.fuliang;
import java.io.*;
import java.net.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.*;
public class Server extends JFrame implements Runnable ...{
private ServerSocket server;
private Socket connection;
private OutputStream output;
private InputStream input;
private Thread outThread;
private JTextArea display;
private JTextField text1;
private JButton startButton;
public static void main(String args[]) ...{
Server s = new Server();
s.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public Server() ...{
super("Server");
startButton = new JButton("Start the server");
text1 = new JTextField(20);
display = new JTextArea(7, 30);
display.setEditable(false);
Container container = getContentPane();
container.setLayout(new BorderLayout());
container.add(startButton,BorderLayout.NORTH);
container.add(new JScrollPane(display),BorderLayout.CENTER);
container.add(text1,BorderLayout.SOUTH);
/**//*
* 给开始按钮添加监听器。
*/
startButton.addActionListener(new ActionListener()...{
public void actionPerformed(ActionEvent e) ...{
display.setText("启动服务器... ");
startButton.setEnabled(false);
try ...{
//端口设为5000,最大连接请求为100个
server = new ServerSocket(5000, 100);
connection = server.accept();
output = connection.getOutputStream();
input = connection.getInputStream();
output.write("连接成功! ".getBytes());
outThread = new Thread(Server.this);
outThread.start();
} catch (IOException ee) ...{
}
}
});
/**//*
/*给文本域添加键盘监听器,按回车发送信息。
*/
text1.addKeyListener(new KeyAdapter()...{
public void keyPressed(KeyEvent ke) ...{
if(ke.getKeyCode() == KeyEvent.VK_ENTER)...{
byte writeBytes[] = new byte[50];
String s = "Server: " + text1.getText() + "";
text1.setText("");
writeBytes = s.getBytes();
display.append(s+" ");
try ...{
output.write(writeBytes);
} catch (IOException ee) ...{
}
if (s.trim().equals("Server: exit")) ...{
outThread.stop();
quit();
}
}
}
});
setSize(300, 400);
setResizable(false);
setVisible(true);
}
public void run() ...{
while (true) ...{
byte readBytes[] = new byte[50];
try ...{
input.read(readBytes);//读去对方发送的消息
} catch (IOException e) ...{
}
String s = new String(readBytes);
display.append(s+" ");
if (s.trim().equals("Client: exit"))
break;
}
quit();
}
public void quit() ...{
try ...{
output.close();
input.close();
connection.close();
} catch (IOException e) ...{
}
startButton.setEnabled(true);
}
}
/**//*
*客户端
*/
package edu.jlu.fuliang;
import java.io.*;
import java.net.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.*;
public class Client extends JFrame implements Runnable ...{
private Socket client;
private OutputStream output;
private InputStream input;
private Thread outThread;
private JTextArea display;
private JTextField text1;
private JButton startButton;
private JMenu loginMenu = new JMenu("登录");
private JMenuItem register = new JMenuItem("注册");
private JMenuItem login = new JMenuItem("登录");
private JMenuBar bar = new JMenuBar();
private Register registerDlg ;
private Login loginDlg;
private RandomAccessFile file;
public static void main(String args[]) ...{
Client c = new Client();
c.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public Client() ...{
super("Client");
startButton = new JButton("Connect to server");
text1 = new JTextField(20);
display = new JTextArea(7, 30);
display.setEditable(false);
loginMenu.add(register);
loginMenu.add(login);
bar.add(loginMenu);
setJMenuBar(bar);
Container container = getContentPane();
container.setLayout(new BorderLayout());
container.add(startButton,BorderLayout.NORTH);
container.add(new JScrollPane(display),BorderLayout.CENTER);
container.add(text1,BorderLayout.SOUTH);
try ...{
file = new RandomAccessFile(new File("E://login.txt"),"rw");
} catch (IOException e1) ...{
e1.printStackTrace();
}
registerDlg = new Register(this,file);
loginDlg = new Login(this,file);
startButton.addActionListener(new ActionListener()...{
public void actionPerformed(ActionEvent e) ...{
display.setText("连接服务器...");
startButton.setEnabled(false);
try ...{
client = new Socket("127.0.0.1", 5000);
output = client.getOutputStream();
input = client.getInputStream();
outThread = new Thread(Client.this);
outThread.start();
} catch (IOException ee) ...{
}
}
});
text1.addKeyListener(new KeyAdapter()...{
public void keyPressed(KeyEvent ke) ...{
if(ke.getKeyCode() == KeyEvent.VK_ENTER)...{
byte writeBytes[] = new byte[50];
String s = loginDlg.getLoginName()+": " + text1.getText() + "";
text1.setText("");
writeBytes = s.getBytes();
display.append(s+" ");
try ...{
output.write(writeBytes);
} catch (IOException ee) ...{
}
if (s.trim().equals(loginDlg.getLoginName()+": exit")) ...{
outThread.stop();
quit();
}
}
}
});
register.addActionListener(new ActionListener()...{
public void actionPerformed(ActionEvent e) ...{
registerDlg.setVisible(true);
}
});
login.addActionListener(new ActionListener()...{
public void actionPerformed(ActionEvent e) ...{
loginDlg.setVisible(true);
}
});
setSize(300, 400);
setResizable(false);
setVisible(true);
}
public void run() ...{
while (true) ...{
byte readBytes[] = new byte[1024];
try ...{
input.read(readBytes);
} catch (IOException e) ...{
}
String s = new String(readBytes);
display.append(s+" ");
if (s.trim().equals("Server: exit"))
break;
}
quit();
}
public void quit() ...{
try ...{
output.close();
input.close();
client.close();
} catch (IOException e) ...{
}
startButton.setEnabled(true);
}
}
package edu.jlu.fuliang;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
public class Login extends JDialog...{
private JTextField textField;
private JButton loginButton;
private RandomAccessFile file;//保存注册信息的文件
private String loginName = "guest";//保存登录者的名字,为登陆为guest;
public Login(JFrame f,RandomAccessFile file)...{
super(f,"登陆",false);
this.file = file;
JPanel panel = new JPanel();
panel.add(new JLabel("昵称:"));
textField = new JTextField(10);
panel.add(textField);
Container container = getContentPane();
container.setLayout(new BorderLayout());
container.add(panel,BorderLayout.NORTH);
loginButton = new JButton("登陆");
container.add(loginButton,BorderLayout.SOUTH);
setVisible(false);
setBounds(100,200,200,200);
loginButton.addActionListener(new LoginListener());
}
public String getLoginName()...{
return loginName;
}
/**//*
* 登录监听器,当单击登陆按钮时,触发该事件
* 从文件中读取并查找是否注册过,如果没有找
* 到则弹出未注册警告。否则弹出欢迎对话框表
* 示欢迎
*/
private class LoginListener implements ActionListener...{
public void actionPerformed(ActionEvent e) ...{
boolean flag = false;
try ...{
String name = textField.getText().trim();
textField.setText("");
file.seek(0);
while(file.getFilePointer() < file.length())...{
String nik = file.readUTF();
if(nik.equals(name))...{
flag = true;
loginName = name;
break;
}
}
if(!flag)...{
String warning="没有找到你的账号请先注册!";
JOptionPane.showMessageDialog(Login.this,warning,"警告",JOptionPane.WARNING_MESSAGE);
}else...{
String welcome="欢迎来聊天!";
JOptionPane.showMessageDialog(Login.this,welcome,"欢迎",JOptionPane.WARNING_MESSAGE);
}
Login.this.setVisible(false);
} catch (IOException e1) ...{
e1.printStackTrace();
}
}
}
}
package edu.jlu.fuliang;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
public class Register extends JDialog...{
private String nickName;
private JTextField textField;
private JButton registerButton;
private RandomAccessFile file;////保存注册信息的文件
public Register(JFrame f,RandomAccessFile file)...{
super(f,"注册",false);
this.file = file;
JPanel panel = new JPanel();
panel.add(new JLabel("昵称:"));
textField = new JTextField(10);
panel.add(textField);
Container container = getContentPane();
container.setLayout(new BorderLayout());
container.add(panel,BorderLayout.NORTH);
registerButton = new JButton("注册");
container.add(registerButton,BorderLayout.SOUTH);
setVisible(false);
setBounds(100,200,200,200);
registerButton.addActionListener(new RegisterListener());
}
/**//*
* 注册监听器,当单击登注册按钮时,触发该事件
* 并向文件中写入注册信息。
*/
private class RegisterListener implements ActionListener...{
public void actionPerformed(ActionEvent e) ...{
try ...{
file.seek(file.length());
String str = textField.getText();
textField.setText("");
file.writeUTF(str);
Register.this.setVisible(false);
} catch (IOException e1) ...{
e1.printStackTrace();
}
}
}
}
*服务端
*/
package edu.jlu.fuliang;
import java.io.*;
import java.net.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.*;
public class Server extends JFrame implements Runnable ...{
private ServerSocket server;
private Socket connection;
private OutputStream output;
private InputStream input;
private Thread outThread;
private JTextArea display;
private JTextField text1;
private JButton startButton;
public static void main(String args[]) ...{
Server s = new Server();
s.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public Server() ...{
super("Server");
startButton = new JButton("Start the server");
text1 = new JTextField(20);
display = new JTextArea(7, 30);
display.setEditable(false);
Container container = getContentPane();
container.setLayout(new BorderLayout());
container.add(startButton,BorderLayout.NORTH);
container.add(new JScrollPane(display),BorderLayout.CENTER);
container.add(text1,BorderLayout.SOUTH);
/**//*
* 给开始按钮添加监听器。
*/
startButton.addActionListener(new ActionListener()...{
public void actionPerformed(ActionEvent e) ...{
display.setText("启动服务器... ");
startButton.setEnabled(false);
try ...{
//端口设为5000,最大连接请求为100个
server = new ServerSocket(5000, 100);
connection = server.accept();
output = connection.getOutputStream();
input = connection.getInputStream();
output.write("连接成功! ".getBytes());
outThread = new Thread(Server.this);
outThread.start();
} catch (IOException ee) ...{
}
}
});
/**//*
/*给文本域添加键盘监听器,按回车发送信息。
*/
text1.addKeyListener(new KeyAdapter()...{
public void keyPressed(KeyEvent ke) ...{
if(ke.getKeyCode() == KeyEvent.VK_ENTER)...{
byte writeBytes[] = new byte[50];
String s = "Server: " + text1.getText() + "";
text1.setText("");
writeBytes = s.getBytes();
display.append(s+" ");
try ...{
output.write(writeBytes);
} catch (IOException ee) ...{
}
if (s.trim().equals("Server: exit")) ...{
outThread.stop();
quit();
}
}
}
});
setSize(300, 400);
setResizable(false);
setVisible(true);
}
public void run() ...{
while (true) ...{
byte readBytes[] = new byte[50];
try ...{
input.read(readBytes);//读去对方发送的消息
} catch (IOException e) ...{
}
String s = new String(readBytes);
display.append(s+" ");
if (s.trim().equals("Client: exit"))
break;
}
quit();
}
public void quit() ...{
try ...{
output.close();
input.close();
connection.close();
} catch (IOException e) ...{
}
startButton.setEnabled(true);
}
}
/**//*
*客户端
*/
package edu.jlu.fuliang;
import java.io.*;
import java.net.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.*;
public class Client extends JFrame implements Runnable ...{
private Socket client;
private OutputStream output;
private InputStream input;
private Thread outThread;
private JTextArea display;
private JTextField text1;
private JButton startButton;
private JMenu loginMenu = new JMenu("登录");
private JMenuItem register = new JMenuItem("注册");
private JMenuItem login = new JMenuItem("登录");
private JMenuBar bar = new JMenuBar();
private Register registerDlg ;
private Login loginDlg;
private RandomAccessFile file;
public static void main(String args[]) ...{
Client c = new Client();
c.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public Client() ...{
super("Client");
startButton = new JButton("Connect to server");
text1 = new JTextField(20);
display = new JTextArea(7, 30);
display.setEditable(false);
loginMenu.add(register);
loginMenu.add(login);
bar.add(loginMenu);
setJMenuBar(bar);
Container container = getContentPane();
container.setLayout(new BorderLayout());
container.add(startButton,BorderLayout.NORTH);
container.add(new JScrollPane(display),BorderLayout.CENTER);
container.add(text1,BorderLayout.SOUTH);
try ...{
file = new RandomAccessFile(new File("E://login.txt"),"rw");
} catch (IOException e1) ...{
e1.printStackTrace();
}
registerDlg = new Register(this,file);
loginDlg = new Login(this,file);
startButton.addActionListener(new ActionListener()...{
public void actionPerformed(ActionEvent e) ...{
display.setText("连接服务器...");
startButton.setEnabled(false);
try ...{
client = new Socket("127.0.0.1", 5000);
output = client.getOutputStream();
input = client.getInputStream();
outThread = new Thread(Client.this);
outThread.start();
} catch (IOException ee) ...{
}
}
});
text1.addKeyListener(new KeyAdapter()...{
public void keyPressed(KeyEvent ke) ...{
if(ke.getKeyCode() == KeyEvent.VK_ENTER)...{
byte writeBytes[] = new byte[50];
String s = loginDlg.getLoginName()+": " + text1.getText() + "";
text1.setText("");
writeBytes = s.getBytes();
display.append(s+" ");
try ...{
output.write(writeBytes);
} catch (IOException ee) ...{
}
if (s.trim().equals(loginDlg.getLoginName()+": exit")) ...{
outThread.stop();
quit();
}
}
}
});
register.addActionListener(new ActionListener()...{
public void actionPerformed(ActionEvent e) ...{
registerDlg.setVisible(true);
}
});
login.addActionListener(new ActionListener()...{
public void actionPerformed(ActionEvent e) ...{
loginDlg.setVisible(true);
}
});
setSize(300, 400);
setResizable(false);
setVisible(true);
}
public void run() ...{
while (true) ...{
byte readBytes[] = new byte[1024];
try ...{
input.read(readBytes);
} catch (IOException e) ...{
}
String s = new String(readBytes);
display.append(s+" ");
if (s.trim().equals("Server: exit"))
break;
}
quit();
}
public void quit() ...{
try ...{
output.close();
input.close();
client.close();
} catch (IOException e) ...{
}
startButton.setEnabled(true);
}
}
package edu.jlu.fuliang;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
public class Login extends JDialog...{
private JTextField textField;
private JButton loginButton;
private RandomAccessFile file;//保存注册信息的文件
private String loginName = "guest";//保存登录者的名字,为登陆为guest;
public Login(JFrame f,RandomAccessFile file)...{
super(f,"登陆",false);
this.file = file;
JPanel panel = new JPanel();
panel.add(new JLabel("昵称:"));
textField = new JTextField(10);
panel.add(textField);
Container container = getContentPane();
container.setLayout(new BorderLayout());
container.add(panel,BorderLayout.NORTH);
loginButton = new JButton("登陆");
container.add(loginButton,BorderLayout.SOUTH);
setVisible(false);
setBounds(100,200,200,200);
loginButton.addActionListener(new LoginListener());
}
public String getLoginName()...{
return loginName;
}
/**//*
* 登录监听器,当单击登陆按钮时,触发该事件
* 从文件中读取并查找是否注册过,如果没有找
* 到则弹出未注册警告。否则弹出欢迎对话框表
* 示欢迎
*/
private class LoginListener implements ActionListener...{
public void actionPerformed(ActionEvent e) ...{
boolean flag = false;
try ...{
String name = textField.getText().trim();
textField.setText("");
file.seek(0);
while(file.getFilePointer() < file.length())...{
String nik = file.readUTF();
if(nik.equals(name))...{
flag = true;
loginName = name;
break;
}
}
if(!flag)...{
String warning="没有找到你的账号请先注册!";
JOptionPane.showMessageDialog(Login.this,warning,"警告",JOptionPane.WARNING_MESSAGE);
}else...{
String welcome="欢迎来聊天!";
JOptionPane.showMessageDialog(Login.this,welcome,"欢迎",JOptionPane.WARNING_MESSAGE);
}
Login.this.setVisible(false);
} catch (IOException e1) ...{
e1.printStackTrace();
}
}
}
}
package edu.jlu.fuliang;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
public class Register extends JDialog...{
private String nickName;
private JTextField textField;
private JButton registerButton;
private RandomAccessFile file;////保存注册信息的文件
public Register(JFrame f,RandomAccessFile file)...{
super(f,"注册",false);
this.file = file;
JPanel panel = new JPanel();
panel.add(new JLabel("昵称:"));
textField = new JTextField(10);
panel.add(textField);
Container container = getContentPane();
container.setLayout(new BorderLayout());
container.add(panel,BorderLayout.NORTH);
registerButton = new JButton("注册");
container.add(registerButton,BorderLayout.SOUTH);
setVisible(false);
setBounds(100,200,200,200);
registerButton.addActionListener(new RegisterListener());
}
/**//*
* 注册监听器,当单击登注册按钮时,触发该事件
* 并向文件中写入注册信息。
*/
private class RegisterListener implements ActionListener...{
public void actionPerformed(ActionEvent e) ...{
try ...{
file.seek(file.length());
String str = textField.getText();
textField.setText("");
file.writeUTF(str);
Register.this.setVisible(false);
} catch (IOException e1) ...{
e1.printStackTrace();
}
}
}
}
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