socket入门小结

1、创建socket server

public class Server {
    public static void main(String[] args) {
        try {
            ServerSocket ss = new ServerSocket(8888);
            System.out.println("启动服务器....");
            while(true) {
                Socket s = ss.accept();
                System.out.println("客户端:"+s.getInetAddress().getHostAddress()+"已连接到服务器");

                BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream()));
                //读取客户端发送来的消息
                String mess = br.readLine();
                System.out.println("客户端："+mess);
                BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
                bw.write("服务端收到后返回："+mess+"\n");
                bw.flush();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

2、创建socket client

public class Client {
    public static void main(String[] args) {
        try {
            Socket s = new Socket("127.0.0.1",51050);

            //构建IO
            InputStream is = s.getInputStream();
            OutputStream os = s.getOutputStream();
            BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(os));
            //向服务器端发送一条消息
            bw.write("测试客户端和服务器通信，服务器接收到消息返回到客户端\n");
            bw.flush();

            //读取服务器返回的消息
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            String mess = br.readLine();
            System.out.println("服务器："+new String(mess.getBytes("GBK"),"GBK"));
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}