服务器端（单线程）

public class MySocketServer1 {private int port;private ServerSocket serverSocket;DataInputStream in;DataOutputStream out;public MySocketServer1(int port) throws IOException {this.port = port;serverSocket = new ServerSocket(port);}public void start() throws IOException {Socket socket = null;for (; ; ) {try {if (socket == null) socket = serverSocket.accept();in = new DataInputStream(socket.getInputStream());System.out.println("收到: " + socket.getInetAddress().getHostAddress() + "\n消息: " + in.readUTF() + "\n");out = new DataOutputStream(socket.getOutputStream());out.writeUTF("服务器已收到");} catch (Exception e) {e.printStackTrace();if (socket != null) {socket.close();socket = null;}}}}public static void main(String[] args) throws IOException {new MySocketServer1(4399).start();}
}

服务器端（多线程）

public class MySocketServer2 implements Runnable {private int port;private ServerSocket serverSocket;DataInputStream in;DataOutputStream out;ExecutorService executorService = Executors.newFixedThreadPool(2);public MySocketServer2(int port) throws IOException {this.port = port;serverSocket = new ServerSocket(port);}public void start() throws IOException {executorService.execute(this);executorService.execute(this);}@Overridepublic void run() {Socket socket = null;for (; ; ) {try {if (socket == null) socket = serverSocket.accept();in = new DataInputStream(socket.getInputStream());System.out.println("收到: " + socket.getInetAddress().getHostAddress() + "\n消息: " + in.readUTF() + "\n");out = new DataOutputStream(socket.getOutputStream());out.writeUTF("服务器已收到");} catch (Exception e) {e.printStackTrace();if (socket != null) {try {socket.close();} catch (IOException ioException) {ioException.printStackTrace();}socket = null;}}}}public static void main(String[] args) throws IOException {new MySocketServer2(4399).start();}
}

客户端

public class MySocketClient1 {private int port;Socket client;DataInputStream in;DataOutputStream out;public MySocketClient1(int port) throws IOException {this.port = port;client = new Socket("127.0.0.1", port);}public void start() throws IOException, InterruptedException {int n = 0;for (int i = 0; i < 3; i++) {out = new DataOutputStream(client.getOutputStream());out.writeUTF("hello" + " " + n++);in = new DataInputStream(client.getInputStream());System.out.println("收到: " + client.getRemoteSocketAddress() + "\n消息: " + in.readUTF() + "\n");Thread.sleep(2000);}client.close();}public static void main(String[] args) throws IOException, InterruptedException {new MySocketClient1(4399).start();}
}

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Java网络编程——Socket

文章目录

服务器端（单线程）

服务器端（多线程）

客户端

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