java版两人聊天程序

server.java

 1 import java.io.*;

 2 import java.net.*;

 3 import java.text.SimpleDateFormat;

 4 import java.util.*;

 5 import java.awt.*;

 6 import java.awt.event.ActionEvent;

 7 import java.awt.event.ActionListener;

 8 

 9 import javax.swing.*;

10 

11 @SuppressWarnings("serial")

12 public class Server extends JFrame {

13     DataInputStream inputFromClient;

14     DataOutputStream outputToClient;

15     // Button for send massage

16     private JButton jbSend = new JButton("Send");

17     // Text area for displaying contents

18     private JTextArea jta = new JTextArea();

19     // Text field for receiving radius

20     private JTextField jtf = new JTextField();

21     SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

22     Date d = new Date();

23     String time = format.format(d);

24 

25     public static void main(String[] args) {

26         new Server();

27     }

28 

29     public Server() {

30         // Place text area on the frame

31         setLayout(new BorderLayout());

32         add(new JScrollPane(jta), BorderLayout.CENTER);

33         JPanel p = new JPanel();

34         p.setLayout(new BorderLayout());

35         p.add(new JLabel("Message"), BorderLayout.WEST);

36         p.add(jtf, BorderLayout.CENTER);

37         jtf.setHorizontalAlignment(JTextField.LEFT);

38         p.add(jbSend, BorderLayout.EAST);

39         add(p, BorderLayout.SOUTH);

40         jtf.addActionListener(new ButtonListener()); // Register listener

41         jbSend.addActionListener(new ButtonListener()); // Register listener

42         setTitle("Server");

43         setSize(500, 300);

44         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

45         setVisible(true); // It is necessary to show the frame here!

46 

47         try {

48             // Create a server socket

49             ServerSocket serverSocket = new ServerSocket(8001);

50             jta.append(" ***Server started at  " + time +"***"+ '\n');

51 

52             // Listen for a connection request

53             Socket socket = serverSocket.accept();

54 

55             // Create data input and output streams

56             inputFromClient = new DataInputStream(socket.getInputStream());

57             outputToClient = new DataOutputStream(socket.getOutputStream());

58 

59             while (true) {

60                 // Receive message from the client

61                 String message = inputFromClient.readUTF();

62                 jta.append(" " + time + '\n');

63                 jta.append(" Message: " + message + '\n');

64             }

65         } catch (IOException ex) {

66             jta.append(" ***端口已被占用!*** " + '\n');

67         }

68     }

69 

70     public class ButtonListener implements ActionListener {

71         public void actionPerformed(ActionEvent e) {

72             try {

73                 // Get the message from the text field

74                 String message = jtf.getText().trim();

75 

76                 // Send the radius to the server

77                 outputToClient.writeUTF(message);

78                 outputToClient.flush();

79 

80                 // Display to the text area

81                 jta.append(" " + time + '\n');

82                 jta.append(" MyMessage: " + message + "\n");

83                 jtf.setText(null);

84             } catch (IOException ex) {

85                 System.err.println(ex);

86             }

87         }

88     }

89 

90 }

client.java

 1 import java.io.*;

 2 import java.net.*;

 3 import java.text.SimpleDateFormat;

 4 import java.util.Date;

 5 import java.awt.*;

 6 import java.awt.event.*;

 7 import javax.swing.*;

 8 

 9 @SuppressWarnings("serial")

10 public class Client extends JFrame {

11     // Text field for receiving message

12     private JTextField jtf = new JTextField();

13 

14     // Text area to display contents

15     private JTextArea jta = new JTextArea();

16     // Button for send massage

17     private JButton jbSend = new JButton("Send");

18     // IO streams

19     private DataOutputStream toServer;

20     private DataInputStream fromServer;

21     SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

22     Date d = new Date();

23     String time = format.format(d);

24     

25     public static void main(String[] args) {

26         new Client();

27     }

28 

29     public Client() {

30         // Panel p to hold the label and text field

31         JPanel p = new JPanel();

32         p.setLayout(new BorderLayout());

33         p.add(new JLabel("Message"), BorderLayout.WEST);

34         p.add(jtf, BorderLayout.CENTER);

35         jtf.setHorizontalAlignment(JTextField.LEFT);

36         p.add(jbSend, BorderLayout.EAST);

37         setLayout(new BorderLayout());

38         add(p, BorderLayout.SOUTH);

39         add(new JScrollPane(jta), BorderLayout.CENTER);

40 

41         jtf.addActionListener(new ButtonListener()); // Register listener

42         jbSend.addActionListener(new ButtonListener()); // Register listener

43 

44         setTitle("Client");

45         setSize(500, 300);

46         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

47         setVisible(true); // It is necessary to show the frame here!

48 

49         try {

50             // Create a socket to connect to the server

51             Socket socket = new Socket("localhost", 8001);

52 

53             // Create an input stream to receive data from the server

54             fromServer = new DataInputStream(socket.getInputStream());

55 

56             // Create an output stream to send data to the server

57             toServer = new DataOutputStream(socket.getOutputStream());

58 

59             while (true) {

60                 // Get message from the server

61                 String message2 = fromServer.readUTF();

62                 jta.append(" " + time + '\n');

63                 jta.append(" Message: " + message2 + '\n');

64             }

65         } catch (IOException ex) {

66             jta.append(" ***连接服务器失败!*** "+ '\n');

67         }

68     }

69 

70     public class ButtonListener implements ActionListener {

71         public void actionPerformed(ActionEvent e) {

72             try {

73                 // Get the message from the text field

74                 String message = jtf.getText().trim();

75 

76                 // Send the message to the server

77                 toServer.writeUTF(message);

78                 toServer.flush();

79                 

80                 // Display to the text area

81                 jta.append(" " + time + '\n');

82                 jta.append(" MyMessage: " + message + "\n");

83                 jtf.setText(null);

84             } catch (IOException ex) {

85                 System.err.println(ex);

86             }

87         }

88     }

89 }

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