服务端与客户端的创建

ServerSocket server = new ServerSocket(9999); //创建客户端，端口为9999

Socket socket = server.accept(); //客户端与服务端连接

InputStream in = socket.getInputStream();

BufferedReader br = new BufferedReader (new InputStreamReader(in));//将字节流转化为字符流，用缓冲流接收

String line = br.readLine();

System.out.println(("服务端接收到的客户端请求" + line));

OutputStream out = new OutputStream();

out.write("".getBytes());

socket.shutdownOutput(); //关闭输出流

socket.shutdownInput();//关闭输入流

Socket socket = new Socket(InetAddress.getByName("127.0.0.1"),9999); //创建客户端，IP地址为本机地址，连接端口为9999的服务端。

OutputStream out = socket.getOutputStream();

out.write();

InputStream in = socket.getInputStream(); //接收服务端响应的内容。

BufferedReader br = new BufferedReader (new InputStreamReader(in));//将字节流转化为字符流，用缓冲流接收。

String line = br.readLine();

System.out.println(("服务端响应" + line));

socket.close(); //关闭流

in.close();

br.close（）；