Client端：
1 package mylab; 2 3 import java.awt.BorderLayout; 4 import java.awt.Dimension; 5 import java.awt.event.ActionEvent; 6 import java.awt.event.ActionListener; 7 import java.io.BufferedReader; 8 import java.io.IOException; 9 import java.io.InputStreamReader; 10 import java.io.PrintWriter; 11 import java.net.Socket; 12 13 import javax.swing.JButton; 14 import javax.swing.JFrame; 15 import javax.swing.JPanel; 16 import javax.swing.JScrollPane; 17 import javax.swing.JTextArea; 18 import javax.swing.ScrollPaneConstants; 19 20 public class Client extends JFrame implements ActionListener { 21 JTextArea input; 22 JTextArea output; 23 JButton close; 24 JButton send; 25 JScrollPane top = new JScrollPane(); 26 JPanel medium, bottom; 27 28 String inMessage, outMessage; 29 30 String s = null; 31 Socket mysocket; 32 BufferedReader br = null; 33 PrintWriter pw = null; 34 35 /** 36 * @param args 37 */ 38 public Client() { 39 super(); 40 setTitle("客户端"); 41 setVisible(true); 42 setBounds(200, 150, 350, 400); 43 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 44 45 top = new JScrollPane(); 46 top.setPreferredSize(new Dimension(300, 200)); 47 top.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED); 48 output = new JTextArea(6, 25); 49 top.setViewportView(output); 50 51 medium = new JPanel(); 52 medium.setPreferredSize(new Dimension(300, 120)); 53 input = new JTextArea(4, 27); 54 medium.add(input); 55 56 bottom = new JPanel(); 57 bottom.setPreferredSize(new Dimension(300, 60)); 58 close = new JButton("关闭"); 59 close.addActionListener(this); 60 send = new JButton("发送"); 61 send.addActionListener(this); 62 bottom.add(close); 63 bottom.add(send); 64 65 getContentPane().add(top, BorderLayout.NORTH); 66 getContentPane().add(medium, BorderLayout.CENTER); 67 getContentPane().add(bottom, BorderLayout.SOUTH); 68 } 69 70 public static void main(String[] args) { 71 // TODO Auto-generated method stub 72 Client client = new Client(); 73 client.run(); 74 } 75 76 public void run() { 77 78 try { 79 80 mysocket = new Socket("127.0.0.1", 2222); 81 br = new BufferedReader(new InputStreamReader( 82 mysocket.getInputStream())); 83 pw = new PrintWriter(mysocket.getOutputStream(), true); 84 while ((inMessage = br.readLine()) != null) { 85 output.append("服务器说：" + inMessage + "\n"); 86 } 87 88 } catch (Exception e) { 89 } 90 } 91 92 @Override 93 public void actionPerformed(ActionEvent e) { 94 // TODO Auto-generated method stub 95 if (close.hasFocus()) { 96 try { 97 mysocket.close(); 98 System.out.println("客户端已关闭"); 99 } catch (IOException e1) {100 // TODO Auto-generated catch block101 e1.printStackTrace();102 }103 }104 if (send.hasFocus()) {105 outMessage = input.getText();106 input.setText(null);107 output.append("客户端说：" + outMessage + "\n");108 pw.println(outMessage);109 pw.flush();110 }111 }112 113 } Server端：
1 package mylab; 2 3 import java.awt.BorderLayout; 4 import java.awt.Dimension; 5 import java.awt.event.ActionEvent; 6 import java.awt.event.ActionListener; 7 import java.io.BufferedReader; 8 import java.io.IOException; 9 import java.io.InputStreamReader; 10 import java.io.PrintWriter; 11 import java.net.ServerSocket; 12 import java.net.Socket; 13 14 import javax.swing.JButton; 15 import javax.swing.JFrame; 16 import javax.swing.JPanel; 17 import javax.swing.JScrollPane; 18 import javax.swing.JTextArea; 19 import javax.swing.ScrollPaneConstants; 20 21 public class Server extends JFrame implements ActionListener { 22 JTextArea input;//显示信息 23 JTextArea output;//输入信息 24 JButton close;//关闭按钮 25 JButton send;//发动按钮 26 JScrollPane top = new JScrollPane();//放input的滚动面板 27 JPanel medium, bottom;//放output，关闭按钮，发送按钮 28 29 String inMessage, outMessage; 30 ServerSocket server = null; 31 Socket you = null; 32 String s = null; 33 PrintWriter pw = null; 34 BufferedReader br = null; 35 36 /** 37 * @param args 38 */ 39 public Server() { 40 super(); 41 setTitle("服务器"); 42 setVisible(true); 43 setBounds(600, 150, 350, 400); 44 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 45 46 top = new JScrollPane(); 47 top.setPreferredSize(new Dimension(300, 200)); 48 top.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED); 49 output = new JTextArea(6, 25); 50 top.setViewportView(output); 51 52 medium = new JPanel(); 53 medium.setPreferredSize(new Dimension(300, 120)); 54 input = new JTextArea(4, 27); 55 medium.add(input); 56 57 bottom = new JPanel(); 58 bottom.setPreferredSize(new Dimension(300, 60)); 59 close = new JButton("关闭"); 60 close.addActionListener(this); 61 send = new JButton("发送"); 62 send.addActionListener(this); 63 bottom.add(close); 64 bottom.add(send); 65 66 getContentPane().add(top, BorderLayout.NORTH); 67 getContentPane().add(medium, BorderLayout.CENTER); 68 getContentPane().add(bottom, BorderLayout.SOUTH); 69 } 70 71 public static void main(String[] args) { 72 // TODO Auto-generated method stub 73 Server sever = new Server(); 74 sever.run(); 75 } 76 77 public void run() { 78 79 try { 80 81 server = new ServerSocket(2222); 82 } catch (IOException e) { 83 System.out.println(e); 84 } 85 try { 86 you = server.accept(); 87 br = new BufferedReader(new InputStreamReader(you.getInputStream())); 88 pw = new PrintWriter(you.getOutputStream(), true); 89 while ((inMessage = br.readLine()) != null) { 90 output.append("客户端说：" + inMessage + "\n"); 91 } 92 } catch (Exception e) { 93 } 94 95 } 96 97 @Override 98 public void actionPerformed(ActionEvent e) { 99 // TODO Auto-generated method stub100 if (close.hasFocus()) {101 try {102 server.close();103 System.out.println("服务器已关闭");104 } catch (IOException e1) {105 // TODO Auto-generated catch block106 e1.printStackTrace();107 }108 }109 if (send.hasFocus()) {110 outMessage = input.getText();111 input.setText(null);112 output.append("服务器说：" + outMessage + "\n");113 pw.println(outMessage);114 pw.flush();115 }116 }117 118 }