Java编程实现基于TCP协议的Socket聊天室示例

package com.han;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.*;
import java.net.*;
import javax.swing.JDialog;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
/**
 * 本程序实现了一个TCP程序的服务器编程部分。
 * 使用Socket套接字进行编程，完成的是基于TCP可靠服务实现与客户端的双通信。
 * 客户端的编程见本包中的类Client
 * @author HAN
 *
 */
@SuppressWarnings("serial")
public class Server extends JDialog{
  private BufferedReader reader;
  private PrintWriter writer;
  private ServerSocket server;
  private Socket socket;
  private JTextArea ta=new JTextArea();
  private JScrollPane sp=new JScrollPane(ta);
  private JTextField tf=new JTextField();
  Container cc;
  public Server(String title) {
    setTitle(title);
    addWindowListener(new WindowAdapter() {
      public void windowClosing (WindowEvent we) {
        dispose(); //撤销dialog一切相关资源
        System.exit(0); //正常退出程序
      }
    });
    cc=getContentPane();
    setLayout(null);
    ta.setLineWrap(true);
    ta.setEditable(false);
    sp.setBounds(0,0,300,342);
    tf.setBounds(0,342,300,25);
    cc.add(sp);
    cc.add(tf);
    tf.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent e){
        try {
          writer=new PrintWriter(socket.getOutputStream(),true);
        } catch (IOException e1) {
          // TODO Auto-generated catch block
          e1.printStackTrace();
        }
        writer.println(tf.getText());
        ta.append("User1："+tf.getText()+'\n');
        tf.setText("");
      }
    });
  }
  void getserver(){
    try{
      server=new ServerSocket(8998);
      ta.append("服务器套接字已经创建成功\n");
      while(true){
        ta.append("等待客户机的连接\n");
        socket=server.accept();
        ta.append("客户机已连接\n");
        reader=new BufferedReader(new InputStreamReader(socket.getInputStream()));
        getClientMessage();
      }
    }catch(Exception e){
      e.printStackTrace();
    }
  }
  private void getClientMessage(){
    try {
      while(true){
        String news=reader.readLine();
        if(news!=null){
          ta.append("User2："+news+"\n");
        }else{
          ta.append("User2（客户端） 已断开链接\n");
          break;
        }
      }
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    try{
      if(reader!=null){
        reader.close();
      }
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    if(socket!=null){
      try {
        socket.close();
      } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
    }
  }
  public static void main(String[] args) {
    Server user1=new Server("User1");
    user1.setBounds(0,0,300,400);
    user1.setResizable(false);
    user1.setVisible(true);
    user1.getserver();
  }
}

package com.han;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import javax.swing.*;
/**
 * 本程序实现了一个TCP程序的客户端编程部分。
 * 使用Socket套接字进行编程，完成的是基于TCP可靠服务实现与服务器的双通信。
 * 服务器的编程见本包中的类Server
 * 可以在不同的平台与不同的机器上运行，只是要把代码中写的IP地址修改为运行服务器程序Server的机器的IP地址。
 * @author HAN
 *
 */
@SuppressWarnings("serial")
public class Client extends JDialog{
  private BufferedReader reader;
  private PrintWriter writer;
  private Socket socket;
  private JTextArea ta=new JTextArea();
  private JScrollPane sp=new JScrollPane(ta);
  private JTextField tf=new JTextField();
  Container cc;
  public Client(String title) {
    setTitle(title);
    addWindowListener(new WindowAdapter() {
      public void windowClosing (WindowEvent we) {
        dispose(); //撤销dialog一切相关资源
        System.exit(0); //正常退出程序
      }
    });
    cc=getContentPane();
    setLayout(null);
    ta.setLineWrap(true);
    ta.setEditable(false);
    sp.setBounds(0,0,300,342);
    tf.setBounds(0,342,300,25);
    cc.add(sp);
    cc.add(tf);
    tf.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent e){
        writer.println(tf.getText());
        ta.append("User2："+tf.getText()+'\n');
        tf.setText("");
      }
    });
  }
  private void connect(){
    ta.append("尝试连接\n");
    try {
      socket=new Socket("192.168.1.3",8998);
    } catch (UnknownHostException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    try {
      writer=new PrintWriter(socket.getOutputStream(),true);
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    ta.append("完成连接\n");
  }
  private void getClientMessage(){
    try {
      reader=new BufferedReader(new InputStreamReader(socket.getInputStream()));
      while(true){
        String news=reader.readLine();
        if(news!=null){
          ta.append("User1："+news+"\n");
        }else{
          ta.append("User1（服务器） 已断开链接，等待服务器重连之时，重启User2（客户端）进行通信\n");
          break;
        }
      }
    } catch (IOException e) {
      // TODO Auto-generated catch block
      ta.append("User1（服务器） 已断开链接，等待服务器重连之时，重启User2（客户端）进行通信\n");
      e.printStackTrace();
    }
    try{
      if(reader!=null){
        reader.close();
      }
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    if(socket!=null){
      try {
        socket.close();
      } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
    }
  }
  public static void main(String[] args) {
    Client user2=new Client("User2");
    user2.setBounds(0,0,300,400);
    user2.setVisible(true);
    user2.setResizable(false);
    user2.connect();
    user2.getClientMessage();
  }
}