基于GUI的网络通信程序设计(Java)

使用 socket 实现了服务端与多个客户端之间的双向通信

服务端

package exp;import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.HashMap;public class ServerFrame extends Frame implements ActionListener{Panel pNorth, pSouth;Label portLabel, sayLabel;TextField portTf, sayTf;   Button startBtn, sayBtn;TextArea ta;Choice socketChoice = new Choice();static int clientNum = 0;ServerSocket serverSocket;HashMap<String, Socket> socketMap = new HashMap<String, Socket>();ServerListenThread serverListenThread = new ServerListenThread();ServerFrame(String name) {super(name);}void draw() {pNorth = new Panel();portLabel = new Label("Port:");           pNorth.add(portLabel);portTf = new TextField("8080", 60);        pNorth.add(portTf);startBtn = new Button("Start");           pNorth.add(startBtn);startBtn.addActionListener(this);this.add(pNorth, "North");ta = new TextArea(10, 80);this.add(ta, "Center");pSouth = new Panel();socketChoice.add("choose");                   pSouth.add(socketChoice);sayTf = new TextField("", 60);          pSouth.add(sayTf);sayBtn = new Button("Say");                pSouth.add(sayBtn);sayBtn.addActionListener(this);this.add(pSouth, "South");  this.setSize(650, 400);this.setVisible(true);}@Overridepublic void actionPerformed(ActionEvent e) {Object source = e.getSource();if (source == startBtn) {ServerListenThread t = new ServerListenThread();t.start();ta.append("Server is listening on port:" + portTf.getText() + "\n");startBtn.setEnabled(false);} else if (source == sayBtn){OutputStream output;try {String toClient = socketChoice.getSelectedItem();Socket socket = socketMap.get(toClient);OutputStream out = socket.getOutputStream();BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out, "GBK"));String msg = sayTf.getText();sayTf.setText("");ta.append("Server: " + msg + "\n");writer.write(msg);writer.newLine();writer.flush();               } catch (Exception e2) {e2.printStackTrace();}}}class ServerListenThread extends Thread {@Overridepublic void run() {try {int port = Integer.parseInt(portTf.getText());serverSocket = new ServerSocket(port);while(true) {Socket s =  serverSocket.accept();clientNum++;String clientName = "client-" + clientNum; ta.append(clientName + "connect\n");socketMap.put(clientName, s);socketChoice.add(clientName);ServerRecvThread t = new ServerRecvThread(s, clientNum);t.start();} } catch(Exception e) {e.printStackTrace();}}}class ServerRecvThread extends Thread {Socket s1;int num = 0;public ServerRecvThread(Socket s1, int num) {this.s1 = s1;this.num = num;}@Overridepublic void run (){InputStream in;try {in = s1.getInputStream();BufferedReader reader = new BufferedReader(new InputStreamReader(in, "GBK"));String msg = reader.readLine();ta.append("client-" + num + ": " + msg + "\n");} catch (IOException e) {e.printStackTrace();}}}public static void main(String[] args) {ServerFrame sf = new ServerFrame("服务端");sf.draw();}
}

客户端

package exp;import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.Socket;public class ClientFrame extends Frame implements ActionListener{Socket s;Panel pNorth, pSouth;TextField ipTf, portTf, sayTf;Label topLabel, ipLabel, portLabel, sayLabel;Button connectBtn, sayBtn;TextArea ta;Choice socketChoice;ClientFrame(String name) {super(name);}public static void main(String[] args) {ClientFrame cf = new ClientFrame("å®¢æˆ·ç«¯");cf.draw();}void draw() {pNorth = new Panel();ipLabel = new Label("Server IP:");          pNorth.add(ipLabel);ipTf = new TextField("127.0.0.1", 20);       pNorth.add(ipTf);portLabel = new Label("Server Port: ");     pNorth.add(portLabel);portTf = new TextField("8080", 20);            pNorth.add(portTf);connectBtn = new Button("Connect");           pNorth.add(connectBtn);connectBtn.addActionListener(this);this.add(pNorth, "North");ta = new TextArea(10, 80);this.add(ta, "Center");pSouth = new Panel();sayLabel = new Label("Say:");                pSouth.add(sayLabel);sayTf = new TextField("", 64);              pSouth.add(sayTf);sayBtn = new Button("Say");                    pSouth.add(sayBtn);sayBtn.addActionListener(this);socketChoice = new Choice();             pSouth.add(socketChoice);this.add(pSouth, "South");this.pack();this.setSize(650, 400);this.setVisible(true);}@Overridepublic void actionPerformed(ActionEvent e) {Object source = e.getSource();if (source == connectBtn) {String ip = ipTf.getText();int port = Integer.parseInt(portTf.getText());try {s = new Socket(ip, port);ta.append("connect to the server..\n");ClientRecvThread t = new ClientRecvThread();t.start();} catch (Exception e2) {e2.printStackTrace();}connectBtn.setEnabled(false);} else if (source == sayBtn){try {OutputStream output = s.getOutputStream();BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(output, "GBK"));String msg = sayTf.getText();sayTf.setText("");ta.append(msg + "\n");writer.write(msg);writer.newLine();writer.flush(); } catch (Exception e2) {e2.printStackTrace();}}}class ClientRecvThread extends Thread {@Override       public void run() {try {while(true) {InputStream input = s.getInputStream();BufferedReader br = new BufferedReader(new InputStreamReader(input, "GBK"));String msg = br.readLine();ta.append("Server: " + msg + "\n");   }} catch (Exception e) {e.printStackTrace();}}  }
}

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