Java socket(一)

服务器代码

    public static void main(String[] args) {
        try {
            ServerSocket serverSocket = new ServerSocket(8901);
            System.out.println("服务器已启动，等待连接......");
            Socket socket = serverSocket.accept();
            System.out.println("【客户端】：" + socket.getPort() + "已成功建立连接");
            DataInputStream inputStream = new DataInputStream(socket.getInputStream());
            DataOutputStream outputStream = new DataOutputStream(socket.getOutputStream());
            outputStream.writeUTF("与服务器建立连接【成功】");
            String fromClientMsg = inputStream.readUTF();
            System.out.println("【客户端】：" + fromClientMsg);
            outputStream.writeUTF("【服务器】：成功接收消息【" + fromClientMsg + "】");
            socket.close();
            serverSocket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

客户端代码

public static void main(String[] args) {
        System.out.println("客户端已启动，正在连接......");
        try {
            Socket socket = new Socket("localhost", 8089);
            DataInputStream inputStream = new DataInputStream(socket.getInputStream());
            DataOutputStream outputStream = new DataOutputStream(socket.getOutputStream());
            String fromServerMsg = inputStream.readUTF();
            System.out.println(fromServerMsg);
            Scanner scanner = new Scanner(System.in);
            String clientMsg = scanner.nextLine();
            outputStream.writeUTF(clientMsg);
            System.out.println(inputStream.readUTF());
            socket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }