//1、创建一个服务器，绑定一个指定的端口
            ServerSocket serverSocket = new ServerSocket(5555);
            //2、调用ServerSocket的accept方法，等待客户端连接
            System.out.println("**********等待连接*********");
            Socket socket = serverSocket.accept();
            //3、获取输入流，读取客户端信息
            InputStream is = socket.getInputStream();
            BufferedReader isr = new BufferedReader(
                    new InputStreamReader(is));
            String str;
            while ((str = isr.readLine()) != null) {
                System.out.println("客户端：" + str);
            }
            socket.shutdownInput();//关闭输入流
            
            //4、关闭资源
            isr.close();
            is.close();
            socket.close();
            System.out.println("连接关闭！");
            
            
     //1、建立客户端Socket对象
            Socket socket = new Socket("localhost", 5555);
            //2、获取输入流，向服务器请求登录
            OutputStream os = socket.getOutputStream();
            PrintWriter pw = new PrintWriter(os);
            pw.write("Gust：admin;Password:123");
            socket.shutdownOutput();
            
            //3、关闭相关资源
            pw.flush();
            pw.close();
            os.close();
            System.out.println("连接关闭！");

server端

*********等待连接*********
连接关闭！

client端

连接关闭！