public class Server {

    public static void main(String[] args) {

        try {

            ServerSocket serverSocket = new ServerSocket(8888);

            System.out.println("服务器启动中....");

            //accept()是在一个套接口接受的一个连接。accept（）是c语言中网络编程的重要的函数，

            //本函数从s的等待连接队列中抽取第一个连接，创建一个与s同类的新的套接口并返回句柄。

            Socket socket = serverSocket.accept();//获取Socket

            InputStream is = socket.getInputStream();//获取输入流

            InputStreamReader isr = new InputStreamReader(is);//InputStreamReader类是从字节流到字符流的桥接器

            BufferedReader br = new BufferedReader(isr);//缓冲流

            System.out.println("客户端数据" + br.readLine());

            String info = null;

            while((info = br.readLine()) != null){

                System.out.println("客户端传递的信息" + info);

            }

            socket.shutdownInput();//shutdownInput和shutdownOutput只关闭相应的输入、输出流，不会同时关闭网络连接的功能。

            OutputStream os = socket.getOutputStream();

            PrintWriter pw = new PrintWriter(os);

            pw.write("欢迎您！！");

            pw.flush();//flush()是清空，而不是刷新    将缓冲区的内容输出

            pw.close();

            os.close();

            br.close();

            isr.close();

            is.close();

            socket.close();

            serverSocket.close();

        } catch (IOException e) {

            System.out.println(e.getMessage());

            e.printStackTrace();

        }

    }

}

public class Client {

    public static void main(String[] args) {

        try {

            Socket socket = new Socket("localhost", 8888);

            System.out.println("客户端启动中....");

            OutputStream os = socket.getOutputStream();

            PrintWriter pw = new PrintWriter(os);

            pw.write("admin");

            pw.flush();

            socket.shutdownOutput();

            InputStream is = socket.getInputStream();

            BufferedReader br = new BufferedReader(new InputStreamReader(is));

            String info = null;

            while((info = br.readLine()) != null){

                System.out.println("服务端返回的信息" + info);

            }

            os.close();

            pw.close();

            is.close();

            br.close();

            socket.close();

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

}