[网络协议]Java SE|基于Socket的TCP编程流程练习

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客户端

四个基本步骤：

1.创建Socket

2.打开 连接到Socket的 输入流/出流：

3.按照协议对Socket进行 读/写 操纵

4.关闭Socket：

服务器端

四个基本步骤：

1.调用ServerSocket(int prot):

2.调用accept():

3.调用该Socket类对象的getOutputStream和getInputStream():

4.关闭ServerSocket和Socket对象：

练习代码如下：

    @Test
    public void client() throws IOException {
        //1. creat Socket
        Socket socket = new Socket("127.0.0.1",8868);

        //2. get ops from Socket
        OutputStream ops = socket.getOutputStream();

        //3. reading or writing by protocol
        ops.write("有趣".getBytes(StandardCharsets.UTF_8));

        //4. close Socket
        socket.close();

    }
    @Test
    public void server() throws IOException {
        //1.creat ServerSocket
        ServerSocket serverSocket = new ServerSocket(8868);

        //2.creat Socket by method of ServerSocket
        Socket socket = serverSocket.accept();

        //3.reading or writing
        InputStream inputStream = socket.getInputStream();
        int len;
        ByteArrayOutputStream bais = new ByteArrayOutputStream();
        while ((len = inputStream.read()) != -1){
            bais.write(len);
        }
        System.out.println(bais.toString());

        //4.close
        serverSocket.close();
        socket.close();

    }